diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index b254d0ad..acedeb18 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -14,8 +14,8 @@
 
 # Versioning
 
-<!-- Update the version if you want the PR to be merged fast. Currently it's a manual 3-steps process:
-  * update version in `versioning.js` using semver principle. Just set the next patch (for fixes) or minor version (for new features)
+<!-- Update the VERSION if you want the PR to be merged. Currently it's a manual 3-steps process:
+  * update VERSION in `versioning.js` using semver principle
   * for all changed files update hash (the part after `?`) in place where file is requested (usually it's `index.html`)
   * if the change can be really interesting for end-users, describe it inside the `showUpdateWindow()` function in `versioning.js` -->
 
diff --git a/index.html b/index.html
index 1e1f219b..bfcaefc5 100644
--- a/index.html
+++ b/index.html
@@ -4846,7 +4846,11 @@
         <div id="zonesBottom">
           <button id="zonesEditorRefresh" data-tip="Refresh the Editor" class="icon-cw"></button>
           <button id="zonesEditStyle" data-tip="Edit zones style in Style Editor" class="icon-adjust"></button>
-          <button id="zonesLegend" data-tip="Toggle Legend box" class="icon-list-bullet"></button>
+          <button
+            id="zonesLegend"
+            data-tip="Toggle Legend box (shows all non-hidden zones)"
+            class="icon-list-bullet"
+          ></button>
           <button
             id="zonesPercentage"
             data-tip="Toggle percentage / absolute values views"
@@ -7985,13 +7989,14 @@
     <script src="utils/stringUtils.js?v=1.99.00"></script>
     <script src="utils/languageUtils.js?v=1.99.00"></script>
     <script src="utils/unitUtils.js?v=1.99.00"></script>
+    <script src="utils/pathUtils.js?v=1.100.00"></script>
     <script defer src="utils/debugUtils.js?v=1.99.00"></script>
 
     <script src="modules/voronoi.js"></script>
     <script src="config/heightmap-templates.js"></script>
     <script src="config/precreated-heightmaps.js"></script>
     <script src="modules/heightmap-generator.js?v=1.99.00"></script>
-    <script src="modules/ocean-layers.js?v=1.99.10"></script>
+    <script src="modules/ocean-layers.js?v=1.100.00"></script>
     <script src="modules/river-generator.js?v=1.99.05"></script>
     <script src="modules/lakes.js?v=1.99.00"></script>
     <script src="modules/biomes.js?v=1.99.00"></script>
@@ -8003,26 +8008,27 @@
     <script src="modules/religions-generator.js?v=1.99.05"></script>
     <script src="modules/military-generator.js?v=1.99.00"></script>
     <script src="modules/markers-generator.js?v=1.99.00"></script>
+    <script src="modules/zones-generator.js?v=1.100.00"></script>
     <script src="modules/coa-generator.js?v=1.99.00"></script>
-    <script src="modules/submap.js?v=1.99.00"></script>
+    <script src="modules/submap.js?v=1.100.00"></script>
     <script src="libs/polylabel.min.js"></script>
     <script src="libs/lineclip.min.js"></script>
     <script src="libs/alea.min.js"></script>
     <script src="modules/fonts.js?v=1.99.03"></script>
     <script src="modules/ui/layers.js?v=1.99.05"></script>
     <script src="modules/ui/measurers.js?v=1.99.00"></script>
-    <script src="modules/ui/stylePresets.js?v=1.99.10"></script>
+    <script src="modules/ui/style-presets.js?v=1.100.00"></script>
 
-    <script src="modules/ui/general.js?v=1.99.05"></script>
-    <script src="modules/ui/options.js?v=1.99.05"></script>
-    <script src="main.js?v=1.99.00"></script>
+    <script src="modules/ui/general.js?v=1.100.00"></script>
+    <script src="modules/ui/options.js?v=1.100.00"></script>
+    <script src="main.js?v=1.100.00"></script>
 
     <script defer src="modules/relief-icons.js?v=1.99.05"></script>
     <script defer src="modules/ui/style.js?v=1.99.12"></script>
     <script defer src="modules/ui/editors.js?v=1.99.05"></script>
-    <script defer src="modules/ui/tools.js?v=1.99.06"></script>
+    <script defer src="modules/ui/tools.js?v=1.100.00"></script>
     <script defer src="modules/ui/world-configurator.js?v=1.99.00"></script>
-    <script defer src="modules/ui/heightmap-editor.js?v=1.99.05"></script>
+    <script defer src="modules/ui/heightmap-editor.js?v=1.100.00"></script>
     <script defer src="modules/ui/provinces-editor.js?v=1.99.05"></script>
     <script defer src="modules/ui/biomes-editor.js?v=1.99.05"></script>
     <script defer src="modules/ui/namesbase-editor.js?v=1.99.00"></script>
@@ -8038,14 +8044,14 @@
     <script defer src="modules/ui/rivers-editor.js?v=1.99.00"></script>
     <script defer src="modules/ui/rivers-creator.js?v=1.99.00"></script>
     <script defer src="modules/ui/relief-editor.js?v=1.99.00"></script>
-    <script defer src="modules/ui/burg-editor.js?v=1.99.05"></script>
+    <script defer src="modules/ui/burg-editor.js?v=1.100.00"></script>
     <script defer src="modules/ui/units-editor.js?v=1.99.05"></script>
     <script defer src="modules/ui/notes-editor.js?v=1.99.06"></script>
     <script defer src="modules/ui/ai-generator.js?v=1.99.09"></script>
     <script defer src="modules/ui/diplomacy-editor.js?v=1.99.00"></script>
-    <script defer src="modules/ui/zones-editor.js?v=1.99.00"></script>
-    <script defer src="modules/ui/burgs-overview.js?v=1.99.05"></script>
-    <script defer src="modules/ui/routes-overview.js?v=1.99.02"></script>
+    <script defer src="modules/ui/zones-editor.js?v=1.100.00"></script>
+    <script defer src="modules/ui/burgs-overview.js?v=1.100.00"></script>
+    <script defer src="modules/ui/routes-overview.js?v=1.100.00"></script>
     <script defer src="modules/ui/rivers-overview.js?v=1.99.00"></script>
     <script defer src="modules/ui/military-overview.js?v=1.99.00"></script>
     <script defer src="modules/ui/regiments-overview.js?v=1.99.00"></script>
@@ -8060,9 +8066,9 @@
     <script defer src="modules/coa-renderer.js?v=1.99.00"></script>
     <script defer src="libs/rgbquant.min.js"></script>
     <script defer src="libs/jquery.ui.touch-punch.min.js"></script>
-    <script defer src="modules/io/save.js?v=1.99.00"></script>
-    <script defer src="modules/io/load.js?v=1.99.07"></script>
+    <script defer src="modules/io/save.js?v=1.100.00"></script>
+    <script defer src="modules/io/load.js?v=1.100.00"></script>
     <script defer src="modules/io/cloud.js?v=1.99.00"></script>
-    <script defer src="modules/io/export.js?v=1.99.14"></script>
+    <script defer src="modules/io/export.js?v=1.100.00"></script>
   </body>
 </html>
diff --git a/main.js b/main.js
index 12f75328..4263318e 100644
--- a/main.js
+++ b/main.js
@@ -62,7 +62,7 @@ let regions = viewbox.append("g").attr("id", "regions");
 let statesBody = regions.append("g").attr("id", "statesBody");
 let statesHalo = regions.append("g").attr("id", "statesHalo");
 let provs = viewbox.append("g").attr("id", "provs");
-let zones = viewbox.append("g").attr("id", "zones").style("display", "none");
+let zones = viewbox.append("g").attr("id", "zones");
 let borders = viewbox.append("g").attr("id", "borders");
 let stateBorders = borders.append("g").attr("id", "stateBorders");
 let provinceBorders = borders.append("g").attr("id", "provinceBorders");
@@ -662,7 +662,7 @@ async function generate(options) {
 
     Military.generate();
     Markers.generate();
-    addZones();
+    Zones.generate();
 
     drawScaleBar(scaleBar, scale);
     Names.getMapName();
@@ -684,7 +684,7 @@ async function generate(options) {
       buttons: {
         "Clear data": function () {
           localStorage.clear();
-          localStorage.setItem("version", version);
+          localStorage.setItem("version", VERSION);
         },
         Regenerate: function () {
           regenerateMap("generation error");
@@ -1484,442 +1484,6 @@ function rankCells() {
   TIME && console.timeEnd("rankCells");
 }
 
-// generate zones
-function addZones(number = 1) {
-  TIME && console.time("addZones");
-  const {cells, states, burgs} = pack;
-  const used = new Uint8Array(cells.i.length); // to store used cells
-  const zonesData = [];
-
-  for (let i = 0; i < rn(Math.random() * 1.8 * number); i++) addInvasion(); // invasion of enemy lands
-  for (let i = 0; i < rn(Math.random() * 1.6 * number); i++) addRebels(); // rebels along a state border
-  for (let i = 0; i < rn(Math.random() * 1.6 * number); i++) addProselytism(); // proselitism of organized religion
-  for (let i = 0; i < rn(Math.random() * 1.6 * number); i++) addCrusade(); // crusade on heresy lands
-  for (let i = 0; i < rn(Math.random() * 1.8 * number); i++) addDisease(); // disease starting in a random city
-  for (let i = 0; i < rn(Math.random() * 1.4 * number); i++) addDisaster(); // disaster starting in a random city
-  for (let i = 0; i < rn(Math.random() * 1.4 * number); i++) addEruption(); // volcanic eruption aroung volcano
-  for (let i = 0; i < rn(Math.random() * 1.0 * number); i++) addAvalanche(); // avalanche impacting highland road
-  for (let i = 0; i < rn(Math.random() * 1.4 * number); i++) addFault(); // fault line in elevated areas
-  for (let i = 0; i < rn(Math.random() * 1.4 * number); i++) addFlood(); // flood on river banks
-  for (let i = 0; i < rn(Math.random() * 1.2 * number); i++) addTsunami(); // tsunami starting near coast
-
-  drawZones();
-
-  function addInvasion() {
-    const atWar = states.filter(s => s.diplomacy && s.diplomacy.some(d => d === "Enemy"));
-    if (!atWar.length) return;
-
-    const invader = ra(atWar);
-    const target = invader.diplomacy.findIndex(d => d === "Enemy");
-
-    const cell = ra(
-      cells.i.filter(i => cells.state[i] === target && cells.c[i].some(c => cells.state[c] === invader.i))
-    );
-    if (!cell) return;
-
-    const cellsArray = [],
-      queue = [cell],
-      power = rand(5, 30);
-
-    while (queue.length) {
-      const q = P(0.4) ? queue.shift() : queue.pop();
-      cellsArray.push(q);
-      if (cellsArray.length > power) break;
-
-      cells.c[q].forEach(e => {
-        if (used[e]) return;
-        if (cells.state[e] !== target) return;
-        used[e] = 1;
-        queue.push(e);
-      });
-    }
-
-    const invasion = rw({
-      Invasion: 4,
-      Occupation: 3,
-      Raid: 2,
-      Conquest: 2,
-      Subjugation: 1,
-      Foray: 1,
-      Skirmishes: 1,
-      Incursion: 2,
-      Pillaging: 1,
-      Intervention: 1
-    });
-    const name = getAdjective(invader.name) + " " + invasion;
-    zonesData.push({name, type: "Invasion", cells: cellsArray, fill: "url(#hatch1)"});
-  }
-
-  function addRebels() {
-    const state = ra(states.filter(s => s.i && !s.removed && s.neighbors.some(n => n)));
-    if (!state) return;
-
-    const neib = ra(state.neighbors.filter(n => n && !states[n].removed));
-    if (!neib) return;
-    const cell = cells.i.find(
-      i => cells.state[i] === state.i && !state.removed && cells.c[i].some(c => cells.state[c] === neib)
-    );
-    const cellsArray = [];
-    const queue = [];
-    if (cell) queue.push(cell);
-
-    const power = rand(10, 30);
-
-    while (queue.length) {
-      const q = queue.shift();
-      cellsArray.push(q);
-      if (cellsArray.length > power) break;
-
-      cells.c[q].forEach(e => {
-        if (used[e]) return;
-        if (cells.state[e] !== state.i) return;
-        used[e] = 1;
-        if (e % 4 !== 0 && !cells.c[e].some(c => cells.state[c] === neib)) return;
-        queue.push(e);
-      });
-    }
-
-    const rebels = rw({
-      Rebels: 5,
-      Insurgents: 2,
-      Mutineers: 1,
-      Rioters: 1,
-      Separatists: 1,
-      Secessionists: 1,
-      Insurrection: 2,
-      Rebellion: 1,
-      Conspiracy: 2
-    });
-    const name = getAdjective(states[neib].name) + " " + rebels;
-    zonesData.push({name, type: "Rebels", cells: cellsArray, fill: "url(#hatch3)"});
-  }
-
-  function addProselytism() {
-    const organized = ra(pack.religions.filter(r => r.type === "Organized"));
-    if (!organized) return;
-
-    const cell = ra(
-      cells.i.filter(
-        i =>
-          cells.religion[i] &&
-          cells.religion[i] !== organized.i &&
-          cells.c[i].some(c => cells.religion[c] === organized.i)
-      )
-    );
-    if (!cell) return;
-    const target = cells.religion[cell];
-    const cellsArray = [],
-      queue = [cell],
-      power = rand(10, 30);
-
-    while (queue.length) {
-      const q = queue.shift();
-      cellsArray.push(q);
-      if (cellsArray.length > power) break;
-
-      cells.c[q].forEach(e => {
-        if (used[e]) return;
-        if (cells.religion[e] !== target) return;
-        if (cells.h[e] < 20) return;
-        used[e] = 1;
-        //if (e%2 !== 0 && !cells.c[e].some(c => cells.state[c] === neib)) return;
-        queue.push(e);
-      });
-    }
-
-    const name = getAdjective(organized.name.split(" ")[0]) + " Proselytism";
-    zonesData.push({name, type: "Proselytism", cells: cellsArray, fill: "url(#hatch6)"});
-  }
-
-  function addCrusade() {
-    const heresy = ra(pack.religions.filter(r => r.type === "Heresy"));
-    if (!heresy) return;
-
-    const cellsArray = cells.i.filter(i => !used[i] && cells.religion[i] === heresy.i);
-    if (!cellsArray.length) return;
-    cellsArray.forEach(i => (used[i] = 1));
-
-    const name = getAdjective(heresy.name.split(" ")[0]) + " Crusade";
-    zonesData.push({name, type: "Crusade", cells: cellsArray, fill: "url(#hatch6)"});
-  }
-
-  function addDisease() {
-    const burg = ra(burgs.filter(b => !used[b.cell] && b.i && !b.removed)); // random burg
-    if (!burg) return;
-
-    const cellsArray = [];
-    const cost = [];
-    const power = rand(20, 37);
-
-    const queue = new PriorityQueue({comparator: (a, b) => a.p - b.p});
-    queue.queue({e: burg.cell, p: 0});
-
-    while (queue.length) {
-      const next = queue.dequeue();
-      if (cells.burg[next.e] || cells.pop[next.e]) cellsArray.push(next.e);
-      used[next.e] = 1;
-
-      cells.c[next.e].forEach(nextCellId => {
-        const c = Routes.getRoute(next.e, nextCellId) ? 5 : 100;
-        const p = next.p + c;
-        if (p > power) return;
-
-        if (!cost[nextCellId] || p < cost[nextCellId]) {
-          cost[nextCellId] = p;
-          queue.queue({e: nextCellId, p});
-        }
-      });
-    }
-
-    const adjective = () =>
-      ra(["Great", "Silent", "Severe", "Blind", "Unknown", "Loud", "Deadly", "Burning", "Bloody", "Brutal", "Fatal"]);
-    const animal = () =>
-      ra([
-        "Ape",
-        "Bear",
-        "Boar",
-        "Cat",
-        "Cow",
-        "Dog",
-        "Pig",
-        "Fox",
-        "Bird",
-        "Horse",
-        "Rat",
-        "Raven",
-        "Sheep",
-        "Spider",
-        "Wolf"
-      ]);
-    const color = () =>
-      ra([
-        "Golden",
-        "White",
-        "Black",
-        "Red",
-        "Pink",
-        "Purple",
-        "Blue",
-        "Green",
-        "Yellow",
-        "Amber",
-        "Orange",
-        "Brown",
-        "Grey"
-      ]);
-
-    const type = rw({
-      Fever: 5,
-      Pestilence: 2,
-      Flu: 2,
-      Pox: 2,
-      Smallpox: 2,
-      Plague: 4,
-      Cholera: 2,
-      Dropsy: 1,
-      Leprosy: 2
-    });
-    const name = rw({[color()]: 4, [animal()]: 2, [adjective()]: 1}) + " " + type;
-    zonesData.push({name, type: "Disease", cells: cellsArray, fill: "url(#hatch12)"});
-  }
-
-  function addDisaster() {
-    const burg = ra(burgs.filter(b => !used[b.cell] && b.i && !b.removed)); // random burg
-    if (!burg) return;
-
-    const cellsArray = [],
-      cost = [],
-      power = rand(5, 25);
-    const queue = new PriorityQueue({comparator: (a, b) => a.p - b.p});
-    queue.queue({e: burg.cell, p: 0});
-
-    while (queue.length) {
-      const next = queue.dequeue();
-      if (cells.burg[next.e] || cells.pop[next.e]) cellsArray.push(next.e);
-      used[next.e] = 1;
-
-      cells.c[next.e].forEach(function (e) {
-        const c = rand(1, 10);
-        const p = next.p + c;
-        if (p > power) return;
-
-        if (!cost[e] || p < cost[e]) {
-          cost[e] = p;
-          queue.queue({e, p});
-        }
-      });
-    }
-
-    const type = rw({Famine: 5, Dearth: 1, Drought: 3, Earthquake: 3, Tornadoes: 1, Wildfires: 1});
-    const name = getAdjective(burg.name) + " " + type;
-    zonesData.push({name, type: "Disaster", cells: cellsArray, fill: "url(#hatch5)"});
-  }
-
-  function addEruption() {
-    const volcano = byId("markers").querySelector("use[data-id='#marker_volcano']");
-    if (!volcano) return;
-
-    const x = +volcano.dataset.x,
-      y = +volcano.dataset.y,
-      cell = findCell(x, y);
-    const id = volcano.id;
-    const note = notes.filter(n => n.id === id);
-
-    if (note[0]) note[0].legend = note[0].legend.replace("Active volcano", "Erupting volcano");
-    const name = note[0] ? note[0].name.replace(" Volcano", "") + " Eruption" : "Volcano Eruption";
-
-    const cellsArray = [],
-      queue = [cell],
-      power = rand(10, 30);
-
-    while (queue.length) {
-      const q = P(0.5) ? queue.shift() : queue.pop();
-      cellsArray.push(q);
-      if (cellsArray.length > power) break;
-      cells.c[q].forEach(e => {
-        if (used[e] || cells.h[e] < 20) return;
-        used[e] = 1;
-        queue.push(e);
-      });
-    }
-
-    zonesData.push({name, type: "Disaster", cells: cellsArray, fill: "url(#hatch7)"});
-  }
-
-  function addAvalanche() {
-    const routes = cells.i.filter(i => !used[i] && Routes.isConnected(i) && cells.h[i] >= 70);
-    if (!routes.length) return;
-
-    const cell = +ra(routes);
-    const cellsArray = [],
-      queue = [cell],
-      power = rand(3, 15);
-
-    while (queue.length) {
-      const q = P(0.3) ? queue.shift() : queue.pop();
-      cellsArray.push(q);
-      if (cellsArray.length > power) break;
-      cells.c[q].forEach(e => {
-        if (used[e] || cells.h[e] < 65) return;
-        used[e] = 1;
-        queue.push(e);
-      });
-    }
-
-    const proper = getAdjective(Names.getCultureShort(cells.culture[cell]));
-    const name = proper + " Avalanche";
-    zonesData.push({name, type: "Disaster", cells: cellsArray, fill: "url(#hatch5)"});
-  }
-
-  function addFault() {
-    const elevated = cells.i.filter(i => !used[i] && cells.h[i] > 50 && cells.h[i] < 70);
-    if (!elevated.length) return;
-
-    const cell = ra(elevated);
-    const cellsArray = [],
-      queue = [cell],
-      power = rand(3, 15);
-
-    while (queue.length) {
-      const q = queue.pop();
-      if (cells.h[q] >= 20) cellsArray.push(q);
-      if (cellsArray.length > power) break;
-      cells.c[q].forEach(e => {
-        if (used[e] || cells.r[e]) return;
-        used[e] = 1;
-        queue.push(e);
-      });
-    }
-
-    const proper = getAdjective(Names.getCultureShort(cells.culture[cell]));
-    const name = proper + " Fault";
-    zonesData.push({name, type: "Disaster", cells: cellsArray, fill: "url(#hatch2)"});
-  }
-
-  function addFlood() {
-    const fl = cells.fl.filter(fl => fl),
-      meanFlux = d3.mean(fl),
-      maxFlux = d3.max(fl),
-      flux = (maxFlux - meanFlux) / 2 + meanFlux;
-    const rivers = cells.i.filter(
-      i => !used[i] && cells.h[i] < 50 && cells.r[i] && cells.fl[i] > flux && cells.burg[i]
-    );
-    if (!rivers.length) return;
-
-    const cell = +ra(rivers),
-      river = cells.r[cell];
-    const cellsArray = [],
-      queue = [cell],
-      power = rand(5, 30);
-
-    while (queue.length) {
-      const q = queue.pop();
-      cellsArray.push(q);
-      if (cellsArray.length > power) break;
-
-      cells.c[q].forEach(e => {
-        if (used[e] || cells.h[e] < 20 || cells.r[e] !== river || cells.h[e] > 50 || cells.fl[e] < meanFlux) return;
-        used[e] = 1;
-        queue.push(e);
-      });
-    }
-
-    const name = getAdjective(burgs[cells.burg[cell]].name) + " Flood";
-    zonesData.push({name, type: "Disaster", cells: cellsArray, fill: "url(#hatch13)"});
-  }
-
-  function addTsunami() {
-    const coastal = cells.i.filter(i => !used[i] && cells.t[i] === -1 && pack.features[cells.f[i]].type !== "lake");
-    if (!coastal.length) return;
-
-    const cell = +ra(coastal);
-    const cellsArray = [],
-      queue = [cell],
-      power = rand(10, 30);
-
-    while (queue.length) {
-      const q = queue.shift();
-      if (cells.t[q] === 1) cellsArray.push(q);
-      if (cellsArray.length > power) break;
-
-      cells.c[q].forEach(e => {
-        if (used[e]) return;
-        if (cells.t[e] > 2) return;
-        if (pack.features[cells.f[e]].type === "lake") return;
-        used[e] = 1;
-        queue.push(e);
-      });
-    }
-
-    const proper = getAdjective(Names.getCultureShort(cells.culture[cell]));
-    const name = proper + " Tsunami";
-    zonesData.push({name, type: "Disaster", cells: cellsArray, fill: "url(#hatch13)"});
-  }
-
-  function drawZones() {
-    zones
-      .selectAll("g")
-      .data(zonesData)
-      .enter()
-      .append("g")
-      .attr("id", (d, i) => "zone" + i)
-      .attr("data-description", d => d.name)
-      .attr("data-type", d => d.type)
-      .attr("data-cells", d => d.cells.join(","))
-      .attr("fill", d => d.fill)
-      .selectAll("polygon")
-      .data(d => d.cells)
-      .enter()
-      .append("polygon")
-      .attr("points", d => getPackPolygon(d))
-      .attr("id", function (d) {
-        return this.parentNode.id + "_" + d;
-      });
-  }
-
-  TIME && console.timeEnd("addZones");
-}
-
 // show map stats on generation complete
 function showStatistics() {
   const heightmap = byId("templateInput").value;
@@ -1971,8 +1535,7 @@ function undraw() {
   viewbox
     .selectAll("path, circle, polygon, line, text, use, #texture > image, #zones > g, #armies > g, #ruler > g")
     .remove();
-  document
-    .getElementById("deftemp")
+  byId("deftemp")
     .querySelectorAll("path, clipPath, svg")
     .forEach(el => el.remove());
   byId("coas").innerHTML = ""; // remove auto-generated emblems
diff --git a/modules/burgs-and-states.js b/modules/burgs-and-states.js
index 8441929c..5d6d7a9e 100644
--- a/modules/burgs-and-states.js
+++ b/modules/burgs-and-states.js
@@ -611,8 +611,7 @@ window.BurgsAndStates = (() => {
   // generate Diplomatic Relationships
   const generateDiplomacy = () => {
     TIME && console.time("generateDiplomacy");
-    const cells = pack.cells,
-      states = pack.states;
+    const {cells, states} = pack;
     const chronicle = (states[0].diplomacy = []);
     const valid = states.filter(s => s.i && !states.removed);
 
@@ -696,21 +695,23 @@ window.BurgsAndStates = (() => {
       const defender = ra(
         ad.map((r, d) => (r === "Rival" && !states[d].diplomacy.includes("Vassal") ? d : 0)).filter(d => d)
       );
-      let ap = states[attacker].area * states[attacker].expansionism,
-        dp = states[defender].area * states[defender].expansionism;
+      let ap = states[attacker].area * states[attacker].expansionism;
+      let dp = states[defender].area * states[defender].expansionism;
       if (ap < dp * gauss(1.6, 0.8, 0, 10, 2)) continue; // defender is too strong
-      const an = states[attacker].name,
-        dn = states[defender].name; // names
-      const attackers = [attacker],
-        defenders = [defender]; // attackers and defenders array
+
+      const an = states[attacker].name;
+      const dn = states[defender].name; // names
+      const attackers = [attacker];
+      const defenders = [defender]; // attackers and defenders array
       const dd = states[defender].diplomacy; // defender relations;
 
-      // start a war
-      const war = [`${an}-${trimVowels(dn)}ian War`, `${an} declared a war on its rival ${dn}`];
-      const end = options.year;
-      const start = end - gauss(2, 2, 0, 5);
-      states[attacker].campaigns.push({name: `${trimVowels(dn)}ian War`, start, end});
-      states[defender].campaigns.push({name: `${trimVowels(an)}ian War`, start, end});
+      // start an ongoing war
+      const name = `${an}-${trimVowels(dn)}ian War`;
+      const start = options.year - gauss(2, 3, 0, 10);
+      const war = [name, `${an} declared a war on its rival ${dn}`];
+      const campaign = {name, start, attacker, defender};
+      states[attacker].campaigns.push(campaign);
+      states[defender].campaigns.push(campaign);
 
       // attacker vassals join the war
       ad.forEach((r, d) => {
@@ -790,7 +791,6 @@ window.BurgsAndStates = (() => {
     }
 
     TIME && console.timeEnd("generateDiplomacy");
-    //console.table(states.map(s => s.diplomacy));
   };
 
   // select a forms for listed or all valid states
diff --git a/modules/dynamic/auto-update.js b/modules/dynamic/auto-update.js
index 4bbb778d..a11faa31 100644
--- a/modules/dynamic/auto-update.js
+++ b/modules/dynamic/auto-update.js
@@ -1,8 +1,10 @@
 "use strict";
 
 // update old map file to the current version
-export function resolveVersionConflicts(version) {
-  if (version < 1) {
+export function resolveVersionConflicts(mapVersion) {
+  const isOlderThan = tagVersion => compareVersions(mapVersion, tagVersion).isOlder;
+
+  if (isOlderThan("1.0.0")) {
     // v1.0 added a new religions layer
     relig = viewbox.insert("g", "#terrain").attr("id", "relig");
     Religions.generate();
@@ -63,7 +65,7 @@ export function resolveVersionConflicts(version) {
       .attr("stroke-width", 0)
       .attr("stroke-dasharray", null)
       .attr("stroke-linecap", "butt");
-    addZones();
+    Zones.generate();
     if (!markers.selectAll("*").size()) {
       Markers.generate();
       turnButtonOn("toggleMarkers");
@@ -107,11 +109,11 @@ export function resolveVersionConflicts(version) {
     biomesData.habitability.push(12);
   }
 
-  if (version < 1.1) {
-    // v1.0 initial code had a bug with religion layer id
+  if (isOlderThan("1.1.0")) {
+    // v1.0 code had a bug with religion layer id
     if (!relig.size()) relig = viewbox.insert("g", "#terrain").attr("id", "relig");
 
-    // v1.0 initially has Sympathy status then relaced with Friendly
+    // v1.0 had Sympathy status then relaced with Friendly
     for (const s of pack.states) {
       if (!s.diplomacy) continue;
       s.diplomacy = s.diplomacy.map(r => (r === "Sympathy" ? "Friendly" : r));
@@ -203,7 +205,7 @@ export function resolveVersionConflicts(version) {
     drawCoastline();
   }
 
-  if (version < 1.11) {
+  if (isOlderThan("1.11.0")) {
     // v1.11 added new attributes
     terrs.attr("scheme", "bright").attr("terracing", 0).attr("skip", 5).attr("relax", 0).attr("curve", 0);
     svg.select("#oceanic > *").attr("id", "oceanicPattern");
@@ -229,7 +231,7 @@ export function resolveVersionConflicts(version) {
     if (!terrain.attr("density")) terrain.attr("density", 0.4);
   }
 
-  if (version < 1.21) {
+  if (isOlderThan("1.21.0")) {
     // v1.11 replaced "display" attribute by "display" style
     viewbox.selectAll("g").each(function () {
       if (this.hasAttribute("display")) {
@@ -255,12 +257,12 @@ export function resolveVersionConflicts(version) {
     });
   }
 
-  if (version < 1.22) {
+  if (isOlderThan("1.22.0")) {
     // v1.22 changed state neighbors from Set object to array
     BurgsAndStates.collectStatistics();
   }
 
-  if (version < 1.3) {
+  if (isOlderThan("1.3.0")) {
     // v1.3 added global options object
     const winds = options.slice(); // previostly wind was saved in settings[19]
     const year = rand(100, 2000);
@@ -285,7 +287,7 @@ export function resolveVersionConflicts(version) {
     Military.generate();
   }
 
-  if (version < 1.4) {
+  if (isOlderThan("1.4.0")) {
     // v1.35 added dry lakes
     if (!lakes.select("#dry").size()) {
       lakes.append("g").attr("id", "dry");
@@ -329,7 +331,7 @@ export function resolveVersionConflicts(version) {
     pack.states.filter(s => s.military).forEach(s => s.military.forEach(r => (r.state = s.i)));
   }
 
-  if (version < 1.5) {
+  if (isOlderThan("1.5.0")) {
     // not need to store default styles from v 1.5
     localStorage.removeItem("styleClean");
     localStorage.removeItem("styleGloom");
@@ -367,7 +369,7 @@ export function resolveVersionConflicts(version) {
     });
   }
 
-  if (version < 1.6) {
+  if (isOlderThan("1.6.0")) {
     // v1.6 changed rivers data
     for (const river of pack.rivers) {
       const el = document.getElementById("river" + river.i);
@@ -399,7 +401,7 @@ export function resolveVersionConflicts(version) {
     }
   }
 
-  if (version < 1.61) {
+  if (isOlderThan("1.61.0")) {
     // v1.61 changed rulers data
     ruler.style("display", null);
     rulers = new Rulers();
@@ -453,12 +455,12 @@ export function resolveVersionConflicts(version) {
     pattern.innerHTML = /* html */ `<image id="oceanicPattern" href=${href} width="100" height="100" opacity="0.2"></image>`;
   }
 
-  if (version < 1.62) {
+  if (isOlderThan("1.62.0")) {
     // v1.62 changed grid data
     gridOverlay.attr("size", null);
   }
 
-  if (version < 1.63) {
+  if (isOlderThan("1.63.0")) {
     // v1.63 changed ocean pattern opacity element
     const oceanPattern = document.getElementById("oceanPattern");
     if (oceanPattern) oceanPattern.removeAttribute("opacity");
@@ -472,7 +474,7 @@ export function resolveVersionConflicts(version) {
     labels.select("#addedLabels").style("text-shadow", "white 0 0 4px");
   }
 
-  if (version < 1.64) {
+  if (isOlderThan("1.64.0")) {
     // v1.64 change states style
     const opacity = regions.attr("opacity");
     const filter = regions.attr("filter");
@@ -481,7 +483,7 @@ export function resolveVersionConflicts(version) {
     regions.attr("opacity", null).attr("filter", null);
   }
 
-  if (version < 1.65) {
+  if (isOlderThan("1.65.0")) {
     // v1.65 changed rivers data
     d3.select("#rivers").attr("style", null); // remove style to unhide layer
     const {cells, rivers} = pack;
@@ -523,13 +525,13 @@ export function resolveVersionConflicts(version) {
     }
   }
 
-  if (version < 1.652) {
+  if (isOlderThan("1.652.0")) {
     // remove style to unhide layers
     rivers.attr("style", null);
     borders.attr("style", null);
   }
 
-  if (version < 1.7) {
+  if (isOlderThan("1.7.0")) {
     // v1.7 changed markers data
     const defs = document.getElementById("defs-markers");
     const markersGroup = document.getElementById("markers");
@@ -587,7 +589,7 @@ export function resolveVersionConflicts(version) {
     }
   }
 
-  if (version < 1.72) {
+  if (isOlderThan("1.72.0")) {
     // v1.72 renamed custom style presets
     const storedStyles = Object.keys(localStorage).filter(key => key.startsWith("style"));
     storedStyles.forEach(styleName => {
@@ -598,7 +600,7 @@ export function resolveVersionConflicts(version) {
     });
   }
 
-  if (version < 1.73) {
+  if (isOlderThan("1.73.0")) {
     // v1.73 moved the hatching patterns out of the user's SVG
     document.getElementById("hatching")?.remove();
 
@@ -609,17 +611,17 @@ export function resolveVersionConflicts(version) {
     });
   }
 
-  if (version < 1.84) {
+  if (isOlderThan("1.84.0")) {
     // v1.84.0 added grid.cellsDesired to stored data
     if (!grid.cellsDesired) grid.cellsDesired = rn((graphWidth * graphHeight) / grid.spacing ** 2, -3);
   }
 
-  if (version < 1.85) {
+  if (isOlderThan("1.85.0")) {
     // v1.84.0 moved intial screen out of maon svg
     svg.select("#initial").remove();
   }
 
-  if (version < 1.86) {
+  if (isOlderThan("1.86.0")) {
     // v1.86.0 added multi-origin culture and religion hierarchy trees
     for (const culture of pack.cultures) {
       culture.origins = [culture.origin];
@@ -632,14 +634,14 @@ export function resolveVersionConflicts(version) {
     }
   }
 
-  if (version < 1.88) {
+  if (isOlderThan("1.88.0")) {
     // v1.87 may have incorrect shield for some reason
     pack.states.forEach(({coa}) => {
       if (coa?.shield === "state") delete coa.shield;
     });
   }
 
-  if (version < 1.91) {
+  if (isOlderThan("1.91.0")) {
     // from 1.91.00 custom coa is moved to coa object
     pack.states.forEach(state => {
       if (state.coa === "custom") state.coa = {custom: true};
@@ -688,14 +690,14 @@ export function resolveVersionConflicts(version) {
     });
   }
 
-  if (version < 1.92) {
+  if (isOlderThan("1.92.0")) {
     // v1.92 change labels text-anchor from 'start' to 'middle'
     labels.selectAll("tspan").each(function () {
       this.setAttribute("x", 0);
     });
   }
 
-  if (version < 1.94) {
+  if (isOlderThan("1.94.0")) {
     // from v1.94.00 texture image is removed when layer is off
     texture.style("display", null);
 
@@ -713,7 +715,7 @@ export function resolveVersionConflicts(version) {
     }
   }
 
-  if (version < 1.95) {
+  if (isOlderThan("1.95.0")) {
     // v1.95.00 added vignette visual layer
     const mask = defs.append("mask").attr("id", "vignette-mask");
     mask.append("rect").attr("fill", "white").attr("x", 0).attr("y", 0).attr("width", "100%").attr("height", "100%");
@@ -739,7 +741,7 @@ export function resolveVersionConflicts(version) {
     vignette.append("rect").attr("x", 0).attr("y", 0).attr("width", "100%").attr("height", "100%");
   }
 
-  if (version < 1.96) {
+  if (isOlderThan("1.96.0")) {
     // v1.96 added ocean rendering for heightmap
     terrs.selectAll("*").remove();
 
@@ -833,7 +835,7 @@ export function resolveVersionConflicts(version) {
     });
   }
 
-  if (version < 1.97) {
+  if (isOlderThan("1.97.0")) {
     // v1.97.00 changed MFCG link to an arbitrary preview URL
     options.villageMaxPopulation = 2000;
     options.showBurgPreview = options.showMFCGMap;
@@ -849,7 +851,7 @@ export function resolveVersionConflicts(version) {
     });
   }
 
-  if (version < 1.98) {
+  if (isOlderThan("1.98.0")) {
     // v1.98.00 changed compass layer and rose element id
     const rose = compass.select("use");
     rose.attr("xlink:href", "#defs-compass-rose");
@@ -861,7 +863,7 @@ export function resolveVersionConflicts(version) {
     }
   }
 
-  if (version < 1.99) {
+  if (isOlderThan("1.99.0")) {
     // v1.99.00 changed routes generation algorithm and data format
     routes.attr("display", null).attr("style", null);
 
@@ -923,4 +925,19 @@ export function resolveVersionConflicts(version) {
       }
     }
   }
+
+  if (isOlderThan("1.100.0")) {
+    // v1.100.00 added zones to pack data
+    pack.zones = [];
+    zones.selectAll("g").each(function () {
+      const i = pack.zones.length;
+      const name = this.dataset.description;
+      const type = this.dataset.type;
+      const color = this.getAttribute("fill");
+      const cells = this.dataset.cells.split(",").map(Number);
+      pack.zones.push({i, name, type, cells, color});
+    });
+    zones.style("display", null).selectAll("*").remove();
+    if (layerIsOn("toggleZones")) drawZones();
+  }
 }
diff --git a/modules/dynamic/export-json.js b/modules/dynamic/export-json.js
index df0d6815..cc895b7a 100644
--- a/modules/dynamic/export-json.js
+++ b/modules/dynamic/export-json.js
@@ -53,7 +53,8 @@ function getMinimalDataJson() {
     religions: pack.religions,
     rivers: pack.rivers,
     markers: pack.markers,
-    routes: pack.routes
+    routes: pack.routes,
+    zones: pack.zones
   };
   return JSON.stringify({info, settings, mapCoordinates, pack: packData, biomesData, notes, nameBases});
 }
@@ -72,7 +73,7 @@ function getGridDataJson() {
 
 function getMapInfo() {
   return {
-    version,
+    version: VERSION,
     description: "Azgaar's Fantasy Map Generator output: azgaar.github.io/Fantasy-map-generator",
     exportedAt: new Date().toISOString(),
     mapName: mapName.value,
@@ -172,7 +173,8 @@ function getPackCellsData() {
     religions: pack.religions,
     rivers: pack.rivers,
     markers: pack.markers,
-    routes: pack.routes
+    routes: pack.routes,
+    zones: pack.zones
   };
 }
 
diff --git a/modules/io/load.js b/modules/io/load.js
index 81786374..6462b35f 100644
--- a/modules/io/load.js
+++ b/modules/io/load.js
@@ -104,8 +104,6 @@ function showUploadErrorMessage(error, URL, random) {
 
 function uploadMap(file, callback) {
   uploadMap.timeStart = performance.now();
-  const OLDEST_SUPPORTED_VERSION = 0.7;
-  const currentVersion = parseFloat(version);
 
   const fileReader = new FileReader();
   fileReader.onloadend = async function (fileLoadedEvent) {
@@ -114,14 +112,14 @@ function uploadMap(file, callback) {
     const result = fileLoadedEvent.target.result;
     const [mapData, mapVersion] = await parseLoadedResult(result);
 
-    const isInvalid = !mapData || isNaN(mapVersion) || mapData.length < 26 || !mapData[5];
-    const isUpdated = mapVersion === currentVersion;
-    const isAncient = mapVersion < OLDEST_SUPPORTED_VERSION;
-    const isNewer = mapVersion > currentVersion;
-    const isOutdated = mapVersion < currentVersion;
+    const isInvalid = !mapData || !isValidVersion(mapVersion) || mapData.length < 26 || !mapData[5];
+    const isUpdated = compareVersions(mapVersion, VERSION).isEqual;
+    const isAncient = compareVersions(mapVersion, "0.7.0").isOlder;
+    const isNewer = compareVersions(mapVersion, VERSION).isNewer;
+    const isOutdated = compareVersions(mapVersion, VERSION).isOlder;
 
     if (isInvalid) return showUploadMessage("invalid", mapData, mapVersion);
-    if (isUpdated) return parseLoadedData(mapData);
+    if (isUpdated) return showUploadMessage("updated", mapData, mapVersion);
     if (isAncient) return showUploadMessage("ancient", mapData, mapVersion);
     if (isNewer) return showUploadMessage("newer", mapData, mapVersion);
     if (isOutdated) return showUploadMessage("outdated", mapData, mapVersion);
@@ -154,8 +152,8 @@ async function parseLoadedResult(result) {
     const decoded = isDelimited ? resultAsString : decodeURIComponent(atob(resultAsString));
 
     const mapData = decoded.split("\r\n");
-    const mapVersion = parseFloat(mapData[0].split("|")[0] || mapData[0]);
-    return [mapData, mapVersion];
+    const mapVersionString = mapData[0].split("|")[0] || mapData[0] || "";
+    return [mapData, mapVersionString];
   } catch (error) {
     // map file can be compressed with gzip
     const uncompressedData = await uncompress(result);
@@ -167,35 +165,36 @@ async function parseLoadedResult(result) {
 }
 
 function showUploadMessage(type, mapData, mapVersion) {
-  const archive = link("https://github.com/Azgaar/Fantasy-Map-Generator/wiki/Changelog", "archived version");
-  let message, title, canBeLoaded;
+  let message, title;
 
   if (type === "invalid") {
-    message = `The file does not look like a valid save file.<br>Please check the data format`;
+    message = "The file does not look like a valid save file.<br>Please check the data format";
     title = "Invalid file";
-    canBeLoaded = false;
+  } else if (type === "updated") {
+    parseLoadedData(mapData, mapVersion);
+    return;
   } else if (type === "ancient") {
+    const archive = link("https://github.com/Azgaar/Fantasy-Map-Generator/wiki/Changelog", "archived version");
     message = `The map version you are trying to load (${mapVersion}) is too old and cannot be updated to the current version.<br>Please keep using an ${archive}`;
     title = "Ancient file";
-    canBeLoaded = false;
   } else if (type === "newer") {
     message = `The map version you are trying to load (${mapVersion}) is newer than the current version.<br>Please load the file in the appropriate version`;
     title = "Newer file";
-    canBeLoaded = false;
   } else if (type === "outdated") {
-    INFO && console.info(`Loading map. Auto-update from ${mapVersion} to ${version}`);
+    INFO && console.info(`Loading map. Auto-updating from ${mapVersion} to ${VERSION}`);
     parseLoadedData(mapData, mapVersion);
     return;
   }
 
   alertMessage.innerHTML = message;
-  const buttons = {
-    OK: function () {
-      $(this).dialog("close");
-      if (canBeLoaded) parseLoadedData(mapData, mapVersion);
+  $("#alert").dialog({
+    title,
+    buttons: {
+      OK: function () {
+        $(this).dialog("close");
+      }
     }
-  };
-  $("#alert").dialog({title, buttons});
+  });
 }
 
 async function parseLoadedData(data, mapVersion) {
@@ -380,6 +379,7 @@ async function parseLoadedData(data, mapVersion) {
       pack.rivers = data[32] ? JSON.parse(data[32]) : [];
       pack.markers = data[35] ? JSON.parse(data[35]) : [];
       pack.routes = data[37] ? JSON.parse(data[37]) : [];
+      pack.zones = data[38] ? JSON.parse(data[38]) : [];
 
       const cells = pack.cells;
       cells.biome = Uint8Array.from(data[16].split(","));
@@ -462,9 +462,8 @@ async function parseLoadedData(data, mapVersion) {
 
     {
       // dynamically import and run auto-update script
-      const versionNumber = parseFloat(params[0]);
-      const {resolveVersionConflicts} = await import("../dynamic/auto-update.js?v=1.99.01");
-      resolveVersionConflicts(versionNumber);
+      const {resolveVersionConflicts} = await import("../dynamic/auto-update.js?v=1.100.00");
+      resolveVersionConflicts(mapVersion);
     }
 
     // add custom heightmap color scheme if any
@@ -709,7 +708,7 @@ async function parseLoadedData(data, mapVersion) {
     ERROR && console.error(error);
     clearMainTip();
 
-    alertMessage.innerHTML = /* html */ `An error is occured on map loading. Select a different file to load, <br>generate a new random map or cancel the loading.<br>Map version: ${mapVersion}. Generator version: ${version}.
+    alertMessage.innerHTML = /* html */ `An error is occured on map loading. Select a different file to load, <br>generate a new random map or cancel the loading.<br>Map version: ${mapVersion}. Generator version: ${VERSION}.
       <p id="errorBox">${parseError(error)}</p>`;
 
     $("#alert").dialog({
diff --git a/modules/io/save.js b/modules/io/save.js
index 73e6845f..96d1d981 100644
--- a/modules/io/save.js
+++ b/modules/io/save.js
@@ -41,7 +41,7 @@ function prepareMapData() {
   const date = new Date();
   const dateString = date.getFullYear() + "-" + (date.getMonth() + 1) + "-" + date.getDate();
   const license = "File can be loaded in azgaar.github.io/Fantasy-Map-Generator";
-  const params = [version, license, dateString, seed, graphWidth, graphHeight, mapId].join("|");
+  const params = [VERSION, license, dateString, seed, graphWidth, graphHeight, mapId].join("|");
   const settings = [
     distanceUnitInput.value,
     distanceScale,
@@ -100,6 +100,7 @@ function prepareMapData() {
   const markers = JSON.stringify(pack.markers);
   const cellRoutes = JSON.stringify(pack.cells.routes);
   const routes = JSON.stringify(pack.routes);
+  const zones = JSON.stringify(pack.zones);
 
   // store name array only if not the same as default
   const defaultNB = Names.getNameBases();
@@ -152,7 +153,8 @@ function prepareMapData() {
     fonts,
     markers,
     cellRoutes,
-    routes
+    routes,
+    zones
   ].join("\r\n");
   return mapData;
 }
diff --git a/modules/military-generator.js b/modules/military-generator.js
index df2f2892..e5aacb4d 100644
--- a/modules/military-generator.js
+++ b/modules/military-generator.js
@@ -503,7 +503,9 @@ window.Military = (function () {
       : "";
 
     const campaign = s.campaigns ? ra(s.campaigns) : null;
-    const year = campaign ? rand(campaign.start, campaign.end) : gauss(options.year - 100, 150, 1, options.year - 6);
+    const year = campaign
+      ? rand(campaign.start, campaign.end || options.year)
+      : gauss(options.year - 100, 150, 1, options.year - 6);
     const conflict = campaign ? ` during the ${campaign.name}` : "";
     const legend = `Regiment was formed in ${year} ${options.era}${conflict}. ${station}${troops}`;
     notes.push({id: `regiment${s.i}-${r.i}`, name: `${r.icon} ${r.name}`, legend});
diff --git a/modules/submap.js b/modules/submap.js
index 6a9593ca..8804db9d 100644
--- a/modules/submap.js
+++ b/modules/submap.js
@@ -310,7 +310,7 @@ window.Submap = (function () {
     stage("Redraw emblems.");
     drawEmblems();
     stage("Regenerating Zones.");
-    addZones();
+    Zones.generate();
     Names.getMapName();
     stage("Restoring Notes.");
     notes = parentMap.notes;
diff --git a/modules/ui/burg-editor.js b/modules/ui/burg-editor.js
index a90a11d8..94145e13 100644
--- a/modules/ui/burg-editor.js
+++ b/modules/ui/burg-editor.js
@@ -228,34 +228,26 @@ function editBurg(id) {
     const burgsToRemove = burgsInGroup.filter(b => !(pack.burgs[b].capital || pack.burgs[b].lock));
     const capital = burgsToRemove.length < burgsInGroup.length;
 
-    alertMessage.innerHTML = /* html */ `Are you sure you want to remove ${
-      basic || capital ? "all unlocked elements in the burg group" : "the entire burg group"
-    }?
-      <br />Please note that capital or locked burgs will not be deleted. <br /><br />Burgs to be removed: ${
-        burgsToRemove.length
-      }`;
-    $("#alert").dialog({
-      resizable: false,
+    confirmationDialog({
       title: "Remove burg group",
-      buttons: {
-        Remove: function () {
-          $(this).dialog("close");
-          $("#burgEditor").dialog("close");
-          hideGroupSection();
-          burgsToRemove.forEach(b => removeBurg(b));
+      message: `Are you sure you want to remove ${
+        basic || capital ? "all unlocked elements in the burg group" : "the entire burg group"
+      }?<br />Please note that capital or locked burgs will not be deleted. <br /><br />Burgs to be removed: ${
+        burgsToRemove.length
+      }. This action cannot be reverted`,
+      confirm: "Remove",
+      onConfirm: () => {
+        $("#burgEditor").dialog("close");
+        hideGroupSection();
+        burgsToRemove.forEach(b => removeBurg(b));
 
-          if (!basic && !capital) {
-            // entirely remove group
-            const labelG = document.querySelector("#burgLabels > #" + group.id);
-            const iconG = document.querySelector("#burgIcons > #" + group.id);
-            const anchorG = document.querySelector("#anchors > #" + group.id);
-            if (labelG) labelG.remove();
-            if (iconG) iconG.remove();
-            if (anchorG) anchorG.remove();
-          }
-        },
-        Cancel: function () {
-          $(this).dialog("close");
+        if (!basic && !capital) {
+          const labelG = document.querySelector("#burgLabels > #" + group.id);
+          const iconG = document.querySelector("#burgIcons > #" + group.id);
+          const anchorG = document.querySelector("#anchors > #" + group.id);
+          if (labelG) labelG.remove();
+          if (iconG) iconG.remove();
+          if (anchorG) anchorG.remove();
         }
       }
     });
@@ -509,19 +501,13 @@ function editBurg(id) {
         }
       });
     } else {
-      alertMessage.innerHTML = "Are you sure you want to remove the burg?";
-      $("#alert").dialog({
-        resizable: false,
+      confirmationDialog({
         title: "Remove burg",
-        buttons: {
-          Remove: function () {
-            $(this).dialog("close");
-            removeBurg(id); // see Editors module
-            $("#burgEditor").dialog("close");
-          },
-          Cancel: function () {
-            $(this).dialog("close");
-          }
+        message: "Are you sure you want to remove the burg? <br>This action cannot be reverted",
+        confirm: "Remove",
+        onConfirm: () => {
+          removeBurg(id); // see Editors module
+          $("#burgEditor").dialog("close");
         }
       });
     }
diff --git a/modules/ui/burgs-overview.js b/modules/ui/burgs-overview.js
index f6b09a31..ae4d09dc 100644
--- a/modules/ui/burgs-overview.js
+++ b/modules/ui/burgs-overview.js
@@ -245,7 +245,7 @@ function overviewBurgs(settings = {stateId: null, cultureId: null}) {
 
     confirmationDialog({
       title: "Remove burg",
-      message: "Are you sure you want to remove the burg? This actiove cannot be reverted",
+      message: "Are you sure you want to remove the burg? <br>This action cannot be reverted",
       confirm: "Remove",
       onConfirm: () => {
         removeBurg(burg);
diff --git a/modules/ui/general.js b/modules/ui/general.js
index f665902d..7fd7e4d5 100644
--- a/modules/ui/general.js
+++ b/modules/ui/general.js
@@ -168,6 +168,7 @@ function showMapTooltip(point, e, i, g) {
     if (burgsOverview?.offsetParent) highlightEditorLine(burgsOverview, burg, 5000);
     return;
   }
+
   if (group === "labels") return tip("Click to edit the Label");
 
   if (group === "markers") return tip("Click to edit the Marker. Hold Shift to not close the assosiated note");
@@ -199,9 +200,11 @@ function showMapTooltip(point, e, i, g) {
   if (group === "coastline") return tip("Click to edit the coastline");
 
   if (group === "zones") {
-    const zone = path[path.length - 8];
-    tip(zone.dataset.description);
-    if (zonesEditor?.offsetParent) highlightEditorLine(zonesEditor, zone.id, 5000);
+    const element = path[path.length - 8];
+    const zoneId = +element.dataset.id;
+    const zone = pack.zones.find(zone => zone.i === zoneId);
+    tip(zone.name);
+    if (zonesEditor?.offsetParent) highlightEditorLine(zonesEditor, zoneId, 5000);
     return;
   }
 
diff --git a/modules/ui/heightmap-editor.js b/modules/ui/heightmap-editor.js
index ac270299..a88c698c 100644
--- a/modules/ui/heightmap-editor.js
+++ b/modules/ui/heightmap-editor.js
@@ -261,7 +261,7 @@ function editHeightmap(options) {
 
     Military.generate();
     Markers.generate();
-    addZones();
+    Zones.generate();
     TIME && console.timeEnd("regenerateErasedData");
     INFO && console.groupEnd("Edit Heightmap");
   }
diff --git a/modules/ui/layers.js b/modules/ui/layers.js
index 5572ef78..d717792c 100644
--- a/modules/ui/layers.js
+++ b/modules/ui/layers.js
@@ -181,6 +181,7 @@ function restoreLayers() {
   if (layerIsOn("toggleIce")) drawIce();
   if (layerIsOn("toggleEmblems")) drawEmblems();
   if (layerIsOn("toggleMarkers")) drawMarkers();
+  if (layerIsOn("toggleZones")) drawZones();
 
   // some layers are rendered each time, remove them if they are not on
   if (!layerIsOn("toggleBorders")) borders.selectAll("path").remove();
@@ -1872,18 +1873,29 @@ function fitScaleBar(scaleBar, fullWidth, fullHeight) {
 function toggleZones(event) {
   if (!layerIsOn("toggleZones")) {
     turnButtonOn("toggleZones");
-    $("#zones").fadeIn();
+    drawZones();
     if (event && isCtrlClick(event)) editStyle("zones");
   } else {
-    if (event && isCtrlClick(event)) {
-      editStyle("zones");
-      return;
-    }
+    if (event && isCtrlClick(event)) return editStyle("zones");
     turnButtonOff("toggleZones");
-    $("#zones").fadeOut();
+    zones.selectAll("*").remove();
   }
 }
 
+function drawZones() {
+  const filterBy = byId("zonesFilterType").value;
+  const isFiltered = filterBy && filterBy !== "all";
+  const visibleZones = pack.zones.filter(
+    ({hidden, cells, type}) => !hidden && cells.length && (!isFiltered || type === filterBy)
+  );
+  zones.html(visibleZones.map(drawZone).join(""));
+}
+
+function drawZone({i, cells, type, color}) {
+  const path = getVertexPath(cells);
+  return `<path id="zone${i}" data-id="${i}" data-type="${type}" d="${path}" fill="${color}" />`;
+}
+
 function toggleEmblems(event) {
   if (!layerIsOn("toggleEmblems")) {
     turnButtonOn("toggleEmblems");
diff --git a/modules/ui/options.js b/modules/ui/options.js
index 6d0a9fef..b7b643a1 100644
--- a/modules/ui/options.js
+++ b/modules/ui/options.js
@@ -782,7 +782,7 @@ function showExportPane() {
 }
 
 async function exportToJson(type) {
-  const {exportToJson} = await import("../dynamic/export-json.js?v=1.97.08");
+  const {exportToJson} = await import("../dynamic/export-json.js?v=1.100.00");
   exportToJson(type);
 }
 
diff --git a/modules/ui/routes-editor.js b/modules/ui/routes-editor.js
index 82f13e44..4ea119fb 100644
--- a/modules/ui/routes-editor.js
+++ b/modules/ui/routes-editor.js
@@ -389,20 +389,13 @@ function editRoute(id) {
   }
 
   function removeRoute() {
-    alertMessage.innerHTML = "Are you sure you want to remove the route";
-    $("#alert").dialog({
-      resizable: false,
-      width: "22em",
+    confirmationDialog({
       title: "Remove route",
-      buttons: {
-        Remove: function () {
-          Routes.remove(getRoute());
-          $(this).dialog("close");
-          $("#routeEditor").dialog("close");
-        },
-        Cancel: function () {
-          $(this).dialog("close");
-        }
+      message: "Are you sure you want to remove the route? <br>This action cannot be reverted",
+      confirm: "Remove",
+      onConfirm: () => {
+        Routes.remove(getRoute());
+        $("#routeEditor").dialog("close");
       }
     });
   }
diff --git a/modules/ui/routes-overview.js b/modules/ui/routes-overview.js
index 3a8cc5fa..252b2275 100644
--- a/modules/ui/routes-overview.js
+++ b/modules/ui/routes-overview.js
@@ -144,22 +144,14 @@ function overviewRoutes() {
 
   function triggerRouteRemove() {
     const routeId = +this.parentNode.dataset.id;
-
-    alertMessage.innerHTML = `Are you sure you want to remove the route?`;
-    $("#alert").dialog({
-      resizable: false,
-      width: "22em",
+    confirmationDialog({
       title: "Remove route",
-      buttons: {
-        Remove: function () {
-          const route = pack.routes.find(r => r.i === routeId);
-          Routes.remove(route);
-          routesOverviewAddLines();
-          $(this).dialog("close");
-        },
-        Cancel: function () {
-          $(this).dialog("close");
-        }
+      message: "Are you sure you want to remove the route? <br>This action cannot be reverted",
+      confirm: "Remove",
+      onConfirm: () => {
+        const route = pack.routes.find(r => r.i === routeId);
+        Routes.remove(route);
+        routesOverviewAddLines();
       }
     });
   }
diff --git a/modules/ui/stylePresets.js b/modules/ui/style-presets.js
similarity index 99%
rename from modules/ui/stylePresets.js
rename to modules/ui/style-presets.js
index 4ce4b2a5..ff3ae365 100644
--- a/modules/ui/stylePresets.js
+++ b/modules/ui/style-presets.js
@@ -64,7 +64,7 @@ async function getStylePreset(desiredPreset) {
 
 async function fetchSystemPreset(preset) {
   try {
-    const res = await fetch(`./styles/${preset}.json?v=${version}`);
+    const res = await fetch(`./styles/${preset}.json?v=${VERSION}`);
     return await res.json();
   } catch (err) {
     throw new Error("Cannot fetch style preset", preset);
diff --git a/modules/ui/submap.js b/modules/ui/submap.js
index d5e36fcc..7b9dab06 100644
--- a/modules/ui/submap.js
+++ b/modules/ui/submap.js
@@ -159,18 +159,6 @@ window.UISubmap = (function () {
     return canvas;
   }
 
-  // currently unused alternative to PNG version
-  async function loadPreviewSVG($container, w, h) {
-    $container.innerHTML = /*html*/ `
-      <svg id="submapPreviewSVG" viewBox="0 0 ${graphWidth} ${graphHeight}">
-        <rect width="100%" height="100%" fill="${byId("styleOceanFill").value}" />
-        <rect fill="url(#oceanic)" width="100%" height="100%" />
-        <use href="#map"></use>
-      </svg>
-    `;
-    return byId("submapPreviewSVG");
-  }
-
   // Resample the whole map to different cell resolution or shape
   const resampleCurrentMap = debounce(function () {
     WARN && console.warn("Resampling current map");
diff --git a/modules/ui/tools.js b/modules/ui/tools.js
index 9c75ac20..9dce15c5 100644
--- a/modules/ui/tools.js
+++ b/modules/ui/tools.js
@@ -167,9 +167,9 @@ function regenerateStates() {
   Military.generate();
   if (layerIsOn("toggleEmblems")) drawEmblems();
 
-  if (document.getElementById("burgsOverviewRefresh")?.offsetParent) burgsOverviewRefresh.click();
-  if (document.getElementById("statesEditorRefresh")?.offsetParent) statesEditorRefresh.click();
-  if (document.getElementById("militaryOverviewRefresh")?.offsetParent) militaryOverviewRefresh.click();
+  if (byId("burgsOverviewRefresh")?.offsetParent) burgsOverviewRefresh.click();
+  if (byId("statesEditorRefresh")?.offsetParent) statesEditorRefresh.click();
+  if (byId("militaryOverviewRefresh")?.offsetParent) militaryOverviewRefresh.click();
 }
 
 function recreateStates() {
@@ -445,8 +445,8 @@ function regenerateBurgs() {
   emblems.selectAll("use").remove();
   if (layerIsOn("toggleEmblems")) drawEmblems();
 
-  if (document.getElementById("burgsOverviewRefresh")?.offsetParent) burgsOverviewRefresh.click();
-  if (document.getElementById("statesEditorRefresh")?.offsetParent) statesEditorRefresh.click();
+  if (byId("burgsOverviewRefresh")?.offsetParent) burgsOverviewRefresh.click();
+  if (byId("statesEditorRefresh")?.offsetParent) statesEditorRefresh.click();
 }
 
 function regenerateEmblems() {
@@ -521,7 +521,7 @@ function regenerateCultures() {
 function regenerateMilitary() {
   Military.generate();
   if (!layerIsOn("toggleMilitary")) toggleMilitary();
-  if (document.getElementById("militaryOverviewRefresh").offsetParent) militaryOverviewRefresh.click();
+  if (byId("militaryOverviewRefresh").offsetParent) militaryOverviewRefresh.click();
 }
 
 function regenerateIce() {
@@ -534,7 +534,7 @@ function regenerateMarkers() {
   Markers.regenerate();
   turnButtonOn("toggleMarkers");
   drawMarkers();
-  if (document.getElementById("markersOverviewRefresh").offsetParent) markersOverviewRefresh.click();
+  if (byId("markersOverviewRefresh").offsetParent) markersOverviewRefresh.click();
 }
 
 function regenerateZones(event) {
@@ -545,10 +545,9 @@ function regenerateZones(event) {
   else addNumberOfZones(gauss(1, 0.5, 0.6, 5, 2));
 
   function addNumberOfZones(number) {
-    zones.selectAll("g").remove(); // remove existing zones
-    addZones(number);
-    if (document.getElementById("zonesEditorRefresh").offsetParent) zonesEditorRefresh.click();
-    if (!layerIsOn("toggleZones")) toggleZones();
+    Zones.generate(number);
+    if (byId("zonesEditorRefresh").offsetParent) zonesEditorRefresh.click();
+    if (layerIsOn("toggleZones")) drawZones();
   }
 }
 
@@ -559,7 +558,7 @@ function unpressClickToAddButton() {
 }
 
 function toggleAddLabel() {
-  const pressed = document.getElementById("addLabel").classList.contains("pressed");
+  const pressed = byId("addLabel").classList.contains("pressed");
   if (pressed) {
     unpressClickToAddButton();
     return;
@@ -627,22 +626,22 @@ function addLabelOnClick() {
 
 function toggleAddBurg() {
   unpressClickToAddButton();
-  document.getElementById("addBurgTool").classList.add("pressed");
+  byId("addBurgTool").classList.add("pressed");
   overviewBurgs();
-  document.getElementById("addNewBurg").click();
+  byId("addNewBurg").click();
 }
 
 function toggleAddRiver() {
-  const pressed = document.getElementById("addRiver").classList.contains("pressed");
+  const pressed = byId("addRiver").classList.contains("pressed");
   if (pressed) {
     unpressClickToAddButton();
-    document.getElementById("addNewRiver").classList.remove("pressed");
+    byId("addNewRiver").classList.remove("pressed");
     return;
   }
 
   addFeature.querySelectorAll("button.pressed").forEach(b => b.classList.remove("pressed"));
   addRiver.classList.add("pressed");
-  document.getElementById("addNewRiver").classList.add("pressed");
+  byId("addNewRiver").classList.add("pressed");
   closeDialogs(".stable");
   viewbox.style("cursor", "crosshair").on("click", addRiverOnClick);
   tip("Click on map to place new river or extend an existing one. Hold Shift to place multiple rivers", true, "warn");
@@ -728,7 +727,7 @@ function addRiverOnClick() {
     }
 
     // continue old river
-    document.getElementById("river" + oldRiverId)?.remove();
+    byId("river" + oldRiverId)?.remove();
     riverCells.forEach(i => (cells.r[i] = oldRiverId));
     oldRiverCells.forEach(cell => {
       if (h[cell] > h[min]) {
@@ -796,13 +795,13 @@ function addRiverOnClick() {
   if (d3.event.shiftKey === false) {
     Lakes.cleanupLakeData();
     unpressClickToAddButton();
-    document.getElementById("addNewRiver").classList.remove("pressed");
+    byId("addNewRiver").classList.remove("pressed");
     if (addNewRiver.offsetParent) riversOverviewRefresh.click();
   }
 }
 
 function toggleAddMarker() {
-  const pressed = document.getElementById("addMarker")?.classList.contains("pressed");
+  const pressed = byId("addMarker")?.classList.contains("pressed");
   if (pressed) {
     unpressClickToAddButton();
     return;
@@ -830,7 +829,7 @@ function addMarkerOnClick() {
   const isMarkerSelected = markers.length && elSelected?.node()?.parentElement?.id === "markers";
   const selectedMarker = isMarkerSelected ? markers.find(marker => marker.i === +elSelected.attr("id").slice(6)) : null;
 
-  const selectedType = document.getElementById("addedMarkerType").value;
+  const selectedType = byId("addedMarkerType").value;
   const selectedConfig = Markers.getConfig().find(({type}) => type === selectedType);
 
   const baseMarker = selectedMarker || selectedConfig || {icon: "❓"};
@@ -840,13 +839,13 @@ function addMarkerOnClick() {
     selectedConfig.add("marker" + marker.i, cell);
   }
 
-  const markersElement = document.getElementById("markers");
+  const markersElement = byId("markers");
   const rescale = +markersElement.getAttribute("rescale");
   markersElement.insertAdjacentHTML("beforeend", drawMarker(marker, rescale));
 
   if (d3.event.shiftKey === false) {
-    document.getElementById("markerAdd").classList.remove("pressed");
-    document.getElementById("markersAddFromOverview").classList.remove("pressed");
+    byId("markerAdd").classList.remove("pressed");
+    byId("markersAddFromOverview").classList.remove("pressed");
     unpressClickToAddButton();
   }
 }
diff --git a/modules/ui/zones-editor.js b/modules/ui/zones-editor.js
index 0e0bc6b6..a7ac8835 100644
--- a/modules/ui/zones-editor.js
+++ b/modules/ui/zones-editor.js
@@ -14,7 +14,6 @@ function editZones() {
   $("#zonesEditor").dialog({
     title: "Zones Editor",
     resizable: false,
-    width: fitContent(),
     close: () => exitZonesManualAssignment("close"),
     position: {my: "right top", at: "right-10 top+10", of: "svg", collision: "fit"}
   });
@@ -31,34 +30,40 @@ function editZones() {
   byId("zonesManuallyCancel").on("click", cancelZonesManualAssignent);
   byId("zonesAdd").on("click", addZonesLayer);
   byId("zonesExport").on("click", downloadZonesData);
-  byId("zonesRemove").on("click", toggleEraseMode);
+  byId("zonesRemove").on("click", e => e.target.classList.toggle("pressed"));
 
   body.on("click", function (ev) {
-    const el = ev.target,
-      cl = el.classList,
-      zone = el.parentNode.dataset.id;
-    if (el.tagName === "FILL-BOX") changeFill(el);
-    else if (cl.contains("culturePopulation")) changePopulation(zone);
-    else if (cl.contains("icon-trash-empty")) zoneRemove(zone);
-    else if (cl.contains("icon-eye")) toggleVisibility(el);
-    else if (cl.contains("icon-pin")) toggleFog(zone, cl);
-    if (customization) selectZone(el);
+    const line = ev.target.closest("div.states");
+    const zone = pack.zones.find(z => z.i === +line.dataset.id);
+    if (!zone) return;
+
+    if (customization) {
+      if (zone.hidden) return;
+      body.querySelector("div.selected").classList.remove("selected");
+      line.classList.add("selected");
+      return;
+    }
+
+    if (ev.target.closest("fill-box")) changeFill(ev.target.closest("fill-box").getAttribute("fill"), zone);
+    else if (ev.target.classList.contains("zonePopulation")) changePopulation(zone);
+    else if (ev.target.classList.contains("zoneRemove")) zoneRemove(zone);
+    else if (ev.target.classList.contains("zoneHide")) toggleVisibility(zone);
+    else if (ev.target.classList.contains("zoneFog")) toggleFog(zone, ev.target.classList);
   });
 
   body.on("input", function (ev) {
-    const el = ev.target;
-    const zone = zones.select("#" + el.parentNode.dataset.id);
+    const line = ev.target.closest("div.states");
+    const zone = pack.zones.find(z => z.i === +line.dataset.id);
+    if (!zone) return;
 
-    if (el.classList.contains("zoneName")) zone.attr("data-description", el.value);
-    else if (el.classList.contains("zoneType")) zone.attr("data-type", el.value);
+    if (ev.target.classList.contains("zoneName")) changeDescription(zone, ev.target.value);
+    else if (ev.target.classList.contains("zoneType")) changeType(zone, ev.target.value);
   });
 
   // update type filter with a list of used types
   function updateFilters() {
-    const zones = Array.from(document.querySelectorAll("#zones > g"));
-    const types = unique(zones.map(zone => zone.dataset.type));
-
     const filterSelect = byId("zonesFilterType");
+    const types = unique(pack.zones.map(zone => zone.type));
     const typeToFilterBy = types.includes(zonesFilterType.value) ? zonesFilterType.value : "all";
 
     filterSelect.innerHTML =
@@ -68,47 +73,42 @@ function editZones() {
 
   // add line for each zone
   function zonesEditorAddLines() {
-    const unit = " " + getAreaUnit();
-
     const typeToFilterBy = byId("zonesFilterType").value;
-    const zones = Array.from(document.querySelectorAll("#zones > g"));
-    const filteredZones = typeToFilterBy === "all" ? zones : zones.filter(zone => zone.dataset.type === typeToFilterBy);
+    const filteredZones =
+      typeToFilterBy === "all" ? pack.zones : pack.zones.filter(zone => zone.type === typeToFilterBy);
 
-    const lines = filteredZones.map(zoneEl => {
-      const c = zoneEl.dataset.cells ? zoneEl.dataset.cells.split(",").map(c => +c) : [];
-      const description = zoneEl.dataset.description;
-      const type = zoneEl.dataset.type;
-      const fill = zoneEl.getAttribute("fill");
-      const area = getArea(d3.sum(c.map(i => pack.cells.area[i])));
-      const rural = d3.sum(c.map(i => pack.cells.pop[i])) * populationRate;
+    const lines = filteredZones.map(({i, name, type, cells, color, hidden}) => {
+      const area = getArea(d3.sum(cells.map(i => pack.cells.area[i])));
+      const rural = d3.sum(cells.map(i => pack.cells.pop[i])) * populationRate;
       const urban =
-        d3.sum(c.map(i => pack.cells.burg[i]).map(b => pack.burgs[b].population)) * populationRate * urbanization;
-      const population = rural + urban;
+        d3.sum(cells.map(i => pack.cells.burg[i]).map(b => pack.burgs[b].population)) * populationRate * urbanization;
+      const population = rn(rural + urban);
       const populationTip = `Total population: ${si(population)}; Rural population: ${si(
         rural
       )}; Urban population: ${si(urban)}. Click to change`;
-      const inactive = zoneEl.style.display === "none";
-      const focused = defs.select("#fog #focus" + zoneEl.id).size();
+      const focused = defs.select("#fog #focusZone" + i).size();
 
-      return `<div class="states" data-id="${zoneEl.id}" data-fill="${fill}" data-description="${description}"
-        data-type="${type}" data-cells=${c.length} data-area=${area} data-population=${population}>
-        <fill-box fill="${fill}"></fill-box>
-        <input data-tip="Zone description. Click and type to change" style="width: 11em" class="zoneName" value="${description}" autocorrect="off" spellcheck="false">
+      return /* html */ `<div class="states" data-id="${i}" data-color="${color}" data-description="${name}"
+        data-type="${type}" data-cells=${cells.length} data-area=${area} data-population=${population} style="${
+        hidden && "opacity: 0.5"
+      }">
+        <fill-box fill="${color}"></fill-box>
+        <input data-tip="Zone description. Click and type to change" style="width: 11em" class="zoneName" value="${name}" autocorrect="off" spellcheck="false">
         <input data-tip="Zone type. Click and type to change" class="zoneType" value="${type}">
         <span data-tip="Cells count" class="icon-check-empty hide"></span>
-        <div data-tip="Cells count" class="stateCells hide">${c.length}</div>
+        <div data-tip="Cells count" class="stateCells hide">${cells.length}</div>
         <span data-tip="Zone area" style="padding-right:4px" class="icon-map-o hide"></span>
-        <div data-tip="Zone area" class="biomeArea hide">${si(area) + unit}</div>
+        <div data-tip="Zone area" class="biomeArea hide">${si(area) + " " + getAreaUnit()}</div>
         <span data-tip="${populationTip}" class="icon-male hide"></span>
-        <div data-tip="${populationTip}" class="culturePopulation hide">${si(population)}</div>
+        <div data-tip="${populationTip}" class="zonePopulation hide pointer">${si(population)}</div>
         <span data-tip="Drag to raise or lower the zone" class="icon-resize-vertical hide"></span>
-        <span data-tip="Toggle zone focus" class="icon-pin ${focused ? "" : " inactive"} hide ${
-        c.length ? "" : " placeholder"
+        <span data-tip="Toggle zone focus" class="zoneFog icon-pin ${focused ? "" : "inactive"} hide ${
+        cells.length ? "" : "placeholder"
       }"></span>
-        <span data-tip="Toggle zone visibility" class="icon-eye ${inactive ? " inactive" : ""} hide ${
-        c.length ? "" : " placeholder"
-      }"></span>
-        <span data-tip="Remove zone" class="icon-trash-empty hide"></span>
+        <span data-tip="Toggle zone visibility" class="zoneHide icon-eye hide ${
+          cells.length ? "" : " placeholder"
+        }"></span>
+        <span data-tip="Remove zone" class="zoneRemove icon-trash-empty hide"></span>
       </div>`;
     });
 
@@ -121,14 +121,13 @@ function editZones() {
       (d3.sum(pack.cells.pop) + d3.sum(pack.burgs.filter(b => !b.removed).map(b => b.population)) * urbanization) *
       populationRate;
     zonesFooterPopulation.dataset.population = totalPop;
-    zonesFooterNumber.innerHTML = /* html */ `${filteredZones.length} of ${zones.length}`;
+    zonesFooterNumber.innerHTML = `${filteredZones.length} of ${pack.zones.length}`;
     zonesFooterCells.innerHTML = pack.cells.i.length;
-    zonesFooterArea.innerHTML = si(totalArea) + unit;
+    zonesFooterArea.innerHTML = si(totalArea) + " " + getAreaUnit();
     zonesFooterPopulation.innerHTML = si(totalPop);
 
-    // add listeners
-    body.querySelectorAll("div.states").forEach(el => el.on("mouseenter", ev => zoneHighlightOn(ev)));
-    body.querySelectorAll("div.states").forEach(el => el.on("mouseleave", ev => zoneHighlightOff(ev)));
+    body.querySelectorAll("div.states").forEach(el => el.on("mouseenter", zoneHighlightOn));
+    body.querySelectorAll("div.states").forEach(el => el.on("mouseleave", zoneHighlightOff));
 
     if (body.dataset.type === "percentage") {
       body.dataset.type = "absolute";
@@ -138,25 +137,17 @@ function editZones() {
   }
 
   function zoneHighlightOn(event) {
-    const zone = event.target.dataset.id;
-    zones.select("#" + zone).style("outline", "1px solid red");
+    const zoneId = event.target.dataset.id;
+    zones.select("#zone" + zoneId).style("outline", "1px solid red");
   }
 
   function zoneHighlightOff(event) {
-    const zone = event.target.dataset.id;
-    zones.select("#" + zone).style("outline", null);
+    const zoneId = event.target.dataset.id;
+    zones.select("#zone" + zoneId).style("outline", null);
   }
 
   function filterZonesByType() {
-    const typeToFilterBy = this.value;
-    const zones = Array.from(document.querySelectorAll("#zones > g"));
-
-    for (const zone of zones) {
-      const type = zone.dataset.type;
-      const visible = typeToFilterBy === "all" || type === typeToFilterBy;
-      zone.style.display = visible ? "block" : "none";
-    }
-
+    drawZones();
     zonesEditorAddLines();
   }
 
@@ -167,23 +158,24 @@ function editZones() {
     axis: "y",
     update: movezone
   });
-  function movezone(ev, ui) {
-    const zone = $("#" + ui.item.attr("data-id"));
-    const prev = $("#" + ui.item.prev().attr("data-id"));
-    if (prev) {
-      zone.insertAfter(prev);
-      return;
-    }
-    const next = $("#" + ui.item.next().attr("data-id"));
-    if (next) zone.insertBefore(next);
+
+  function movezone(_ev, ui) {
+    const zone = pack.zones.find(z => z.i === +ui.item[0].dataset.id);
+    const oldIndex = pack.zones.indexOf(zone);
+    const newIndex = ui.item.index();
+    if (oldIndex === newIndex) return;
+
+    pack.zones.splice(oldIndex, 1);
+    pack.zones.splice(newIndex, 0, zone);
+    drawZones();
   }
 
   function enterZonesManualAssignent() {
     if (!layerIsOn("toggleZones")) toggleZones();
     customization = 10;
+
     document.querySelectorAll("#zonesBottom > *").forEach(el => (el.style.display = "none"));
     byId("zonesManuallyButtons").style.display = "inline-block";
-
     zonesEditor.querySelectorAll(".hide").forEach(el => el.classList.add("hidden"));
     zonesFooter.style.display = "none";
     body.querySelectorAll("div > input, select, svg").forEach(e => (e.style.pointerEvents = "none"));
@@ -197,21 +189,32 @@ function editZones() {
       .on("touchmove mousemove", moveZoneBrush);
 
     body.querySelector("div").classList.add("selected");
-    zones.selectAll("g").each(function () {
-      this.setAttribute("data-init", this.getAttribute("data-cells"));
-    });
-  }
 
-  function selectZone(el) {
-    body.querySelector("div.selected").classList.remove("selected");
-    el.classList.add("selected");
+    // draw zones as individual cells
+    zones.selectAll("*").remove();
+
+    const filterBy = byId("zonesFilterType").value;
+    const isFiltered = filterBy && filterBy !== "all";
+    const visibleZones = pack.zones.filter(zone => !zone.hidden && (!isFiltered || zone.type === filterBy));
+    const data = visibleZones.map(({i, cells, color}) => cells.map(cell => ({cell, zoneId: i, fill: color}))).flat();
+    zones
+      .selectAll("polygon")
+      .data(data, d => `${d.zoneId}-${d.cell}`)
+      .enter()
+      .append("polygon")
+      .attr("points", d => getPackPolygon(d.cell))
+      .attr("fill", d => d.fill)
+      .attr("data-zone", d => d.zoneId)
+      .attr("data-cell", d => d.cell);
   }
 
   function selectZoneOnMapClick() {
-    if (d3.event.target.parentElement.parentElement.id !== "zones") return;
-    const zone = d3.event.target.parentElement.id;
-    const el = body.querySelector("div[data-id='" + zone + "']");
-    selectZone(el);
+    if (d3.event.target.parentElement.id !== "zones") return;
+    const zoneId = d3.event.target.dataset.zone;
+    const el = body.querySelector("div[data-id='" + zoneId + "']");
+
+    body.querySelector("div.selected").classList.remove("selected");
+    el.classList.add("selected");
   }
 
   function dragZoneBrush() {
@@ -219,43 +222,41 @@ function editZones() {
     const eraseMode = byId("zonesRemove").classList.contains("pressed");
     const landOnly = byId("zonesBrushLandOnly").checked;
 
-    const selected = body.querySelector("div.selected");
-    const zone = zones.select("#" + selected.dataset.id);
-    const base = zone.attr("id") + "_"; // id generic part
-
     d3.event.on("drag", () => {
       if (!d3.event.dx && !d3.event.dy) return;
       const [x, y] = d3.mouse(this);
       moveCircle(x, y, radius);
 
-      let selection = radius > 5 ? findAll(x, y, radius) : [findCell(x, y, radius)];
+      let selection = radius > 5 ? findAll(x, y, radius) : [findCell(x, y)];
       if (landOnly) selection = selection.filter(i => pack.cells.h[i] >= 20);
-      if (!selection) return;
+      if (!selection.length) return;
 
-      const dataCells = zone.attr("data-cells");
-      let cells = dataCells ? dataCells.split(",").map(i => +i) : [];
+      const zoneId = +body.querySelector("div.selected")?.dataset.id;
+      const zone = pack.zones.find(z => z.i === zoneId);
+      if (!zone) return;
 
       if (eraseMode) {
-        // remove
-        selection.forEach(i => {
-          const index = cells.indexOf(i);
-          if (index === -1) return;
-          zone.select("polygon#" + base + i).remove();
-          cells.splice(index, 1);
-        });
+        const data = zones
+          .selectAll("polygon")
+          .data()
+          .filter(d => !(d.zoneId === zoneId && selection.includes(d.cell)));
+        zones
+          .selectAll("polygon")
+          .data(data, d => `${d.zoneId}-${d.cell}`)
+          .exit()
+          .remove();
       } else {
-        // add
-        selection.forEach(i => {
-          if (cells.includes(i)) return;
-          cells.push(i);
-          zone
-            .append("polygon")
-            .attr("points", getPackPolygon(i))
-            .attr("id", base + i);
-        });
+        const data = selection.map(cell => ({cell, zoneId, fill: zone.color}));
+        zones
+          .selectAll("polygon")
+          .data(data, d => `${d.zoneId}-${d.cell}`)
+          .enter()
+          .append("polygon")
+          .attr("points", d => getPackPolygon(d.cell))
+          .attr("fill", d => d.fill)
+          .attr("data-zone", d => d.zoneId)
+          .attr("data-cell", d => d.cell);
       }
-
-      zone.attr("data-cells", cells);
     });
   }
 
@@ -263,39 +264,29 @@ function editZones() {
     showMainTip();
     const point = d3.mouse(this);
     const radius = +zonesBrush.value;
-    moveCircle(point[0], point[1], radius);
+    moveCircle(...point, radius);
   }
 
   function applyZonesManualAssignent() {
-    zones.selectAll("g").each(function () {
-      if (this.dataset.cells) return;
-      // all zone cells are removed
-      unfog("focusZone" + this.id);
-      this.style.display = "block";
-    });
+    const data = zones.selectAll("polygon").data();
+    const zoneCells = data.reduce((acc, d) => {
+      if (!acc[d.zoneId]) acc[d.zoneId] = [];
+      acc[d.zoneId].push(d.cell);
+      return acc;
+    }, {});
 
+    const filterBy = byId("zonesFilterType").value;
+    const isFiltered = filterBy && filterBy !== "all";
+    const visibleZones = pack.zones.filter(zone => !zone.hidden && (!isFiltered || zone.type === filterBy));
+    visibleZones.forEach(zone => (zone.cells = zoneCells[zone.i] || []));
+
+    drawZones();
     zonesEditorAddLines();
     exitZonesManualAssignment();
   }
 
-  // restore initial zone cells
   function cancelZonesManualAssignent() {
-    zones.selectAll("g").each(function () {
-      const zone = d3.select(this);
-      const dataCells = zone.attr("data-init");
-      const cells = dataCells ? dataCells.split(",").map(i => +i) : [];
-      zone.attr("data-cells", cells);
-      zone.selectAll("*").remove();
-      const base = zone.attr("id") + "_"; // id generic part
-      zone
-        .selectAll("*")
-        .data(cells)
-        .enter()
-        .append("polygon")
-        .attr("points", d => getPackPolygon(d))
-        .attr("id", d => base + d);
-    });
-
+    drawZones();
     exitZonesManualAssignment();
   }
 
@@ -313,60 +304,47 @@ function editZones() {
 
     restoreDefaultEvents();
     clearMainTip();
-    zones.selectAll("g").each(function () {
-      this.removeAttribute("data-init");
-    });
+
     const selected = body.querySelector("div.selected");
     if (selected) selected.classList.remove("selected");
   }
 
-  function changeFill(el) {
-    const fill = el.getAttribute("fill");
+  function changeFill(fill, zone) {
     const callback = newFill => {
-      el.fill = newFill;
-      byId(el.parentNode.dataset.id).setAttribute("fill", newFill);
+      zone.color = newFill;
+      drawZones();
+      zonesEditorAddLines();
     };
 
     openPicker(fill, callback);
   }
 
-  function toggleVisibility(el) {
-    const zone = zones.select("#" + el.parentNode.dataset.id);
-    const inactive = zone.style("display") === "none";
-    inactive ? zone.style("display", "block") : zone.style("display", "none");
-    el.classList.toggle("inactive");
+  function toggleVisibility(zone) {
+    const isHidden = Boolean(zone.hidden);
+    if (isHidden) delete zone.hidden;
+    else zone.hidden = true;
+
+    drawZones();
+    zonesEditorAddLines();
   }
 
-  function toggleFog(z, cl) {
-    const dataCells = zones.select("#" + z).attr("data-cells");
-    if (!dataCells) return;
-
-    const path =
-        "M" +
-        dataCells
-          .split(",")
-          .map(c => getPackPolygon(+c))
-          .join("M") +
-        "Z",
-      id = "focusZone" + z;
-    cl.contains("inactive") ? fog(id, path) : unfog(id);
+  function toggleFog(zone, cl) {
+    const inactive = cl.contains("inactive");
     cl.toggle("inactive");
+
+    if (inactive) {
+      const path = zones.select("#zone" + zone.i).attr("d");
+      fog("focusZone" + zone.i, path);
+    } else {
+      unfog("focusZone" + zone.i);
+    }
   }
 
   function toggleLegend() {
-    if (legend.selectAll("*").size()) {
-      clearLegend();
-      return;
-    } // hide legend
-    const data = [];
-
-    zones.selectAll("g").each(function () {
-      const id = this.dataset.id;
-      const description = this.dataset.description;
-      const fill = this.getAttribute("fill");
-      data.push([id, fill, description]);
-    });
-
+    const filterBy = byId("zonesFilterType").value;
+    const isFiltered = filterBy && filterBy !== "all";
+    const visibleZones = pack.zones.filter(zone => !zone.hidden && (!isFiltered || zone.type === filterBy));
+    const data = visibleZones.map(({i, name, color}) => ["zone" + i, color, name]);
     drawLegend("Zones", data);
   }
 
@@ -380,8 +358,7 @@ function editZones() {
       body.querySelectorAll(":scope > div").forEach(function (el) {
         el.querySelector(".stateCells").innerHTML = rn((+el.dataset.cells / totalCells) * 100, 2) + "%";
         el.querySelector(".biomeArea").innerHTML = rn((+el.dataset.area / totalArea) * 100, 2) + "%";
-        el.querySelector(".culturePopulation").innerHTML =
-          rn((+el.dataset.population / totalPopulation) * 100, 2) + "%";
+        el.querySelector(".zonePopulation").innerHTML = rn((+el.dataset.population / totalPopulation) * 100, 2) + "%";
       });
     } else {
       body.dataset.type = "absolute";
@@ -390,28 +367,23 @@ function editZones() {
   }
 
   function addZonesLayer() {
-    const id = getNextId("zone");
-    const description = "Unknown zone";
+    const zoneId = pack.zones.length ? Math.max(...pack.zones.map(z => z.i)) + 1 : 0;
+    const name = "Unknown zone";
     const type = "Unknown";
-    const fill = "url(#hatch" + (id.slice(4) % 42) + ")";
-    zones
-      .append("g")
-      .attr("id", id)
-      .attr("data-description", description)
-      .attr("data-type", type)
-      .attr("data-cells", "")
-      .attr("fill", fill);
+    const color = "url(#hatch" + (zoneId % 42) + ")";
+    pack.zones.push({i: zoneId, name, type, color, cells: []});
 
     zonesEditorAddLines();
+    drawZones();
   }
 
   function downloadZonesData() {
     const unit = areaUnit.value === "square" ? distanceUnitInput.value + "2" : areaUnit.value;
-    let data = "Id,Fill,Description,Type,Cells,Area " + unit + ",Population\n"; // headers
+    let data = "Id,Color,Description,Type,Cells,Area " + unit + ",Population\n"; // headers
 
     body.querySelectorAll(":scope > div").forEach(function (el) {
       data += el.dataset.id + ",";
-      data += el.dataset.fill + ",";
+      data += el.dataset.color + ",";
       data += el.dataset.description + ",";
       data += el.dataset.type + ",";
       data += el.dataset.cells + ",";
@@ -423,27 +395,24 @@ function editZones() {
     downloadFile(data, name);
   }
 
-  function toggleEraseMode() {
-    this.classList.toggle("pressed");
+  function changeDescription(zone, value) {
+    zone.name = value;
+    zones.select("#zone" + zone.i).attr("data-description", value);
+  }
+
+  function changeType(zone, value) {
+    zone.type = value;
+    zones.select("#zone" + zone.i).attr("data-type", value);
   }
 
   function changePopulation(zone) {
-    const dataCells = zones.select("#" + zone).attr("data-cells");
-    const cells = dataCells
-      ? dataCells
-          .split(",")
-          .map(i => +i)
-          .filter(i => pack.cells.h[i] >= 20)
-      : [];
-    if (!cells.length) {
-      tip("Zone does not have any land cells, cannot change population", false, "error");
-      return;
-    }
-    const burgs = pack.burgs.filter(b => !b.removed && cells.includes(b.cell));
+    const landCells = zone.cells.filter(i => pack.cells.h[i] >= 20);
+    if (!landCells.length) return tip("Zone does not have any land cells, cannot change population", false, "error");
 
-    const rural = rn(d3.sum(cells.map(i => pack.cells.pop[i])) * populationRate);
+    const burgs = pack.burgs.filter(b => !b.removed && landCells.includes(b.cell));
+    const rural = rn(d3.sum(landCells.map(i => pack.cells.pop[i])) * populationRate);
     const urban = rn(
-      d3.sum(cells.map(i => pack.cells.burg[i]).map(b => pack.burgs[b].population)) * populationRate * urbanization
+      d3.sum(landCells.map(i => pack.cells.burg[i]).map(b => pack.burgs[b].population)) * populationRate * urbanization
     );
     const total = rural + urban;
     const l = n => Number(n).toLocaleString();
@@ -485,12 +454,12 @@ function editZones() {
     function applyPopulationChange() {
       const ruralChange = ruralPop.value / rural;
       if (isFinite(ruralChange) && ruralChange !== 1) {
-        cells.forEach(i => (pack.cells.pop[i] *= ruralChange));
+        landCells.forEach(i => (pack.cells.pop[i] *= ruralChange));
       }
       if (!isFinite(ruralChange) && +ruralPop.value > 0) {
         const points = ruralPop.value / populationRate;
-        const pop = rn(points / cells.length);
-        cells.forEach(i => (pack.cells.pop[i] = pop));
+        const pop = rn(points / landCells.length);
+        landCells.forEach(i => (pack.cells.pop[i] = pop));
       }
 
       const urbanChange = urbanPop.value / urban;
@@ -508,8 +477,16 @@ function editZones() {
   }
 
   function zoneRemove(zone) {
-    zones.select("#" + zone).remove();
-    unfog("focusZone" + zone);
-    zonesEditorAddLines();
+    confirmationDialog({
+      title: "Remove zone",
+      message: "Are you sure you want to remove the zone? <br>This action cannot be reverted",
+      confirm: "Remove",
+      onConfirm: () => {
+        pack.zones = pack.zones.filter(z => z.i !== zone.i);
+        zones.select("#zone" + zone.i).remove();
+        unfog("focusZone" + zone.i);
+        zonesEditorAddLines();
+      }
+    });
   }
 }
diff --git a/modules/zones-generator.js b/modules/zones-generator.js
new file mode 100644
index 00000000..e0923615
--- /dev/null
+++ b/modules/zones-generator.js
@@ -0,0 +1,447 @@
+"use strict";
+
+window.Zones = (function () {
+  const config = {
+    invasion: {quantity: 2, generate: addInvasion}, // invasion of enemy lands
+    rebels: {quantity: 1.5, generate: addRebels}, // rebels along a state border
+    proselytism: {quantity: 1.6, generate: addProselytism}, // proselitism of organized religion
+    crusade: {quantity: 1.6, generate: addCrusade}, // crusade on heresy lands
+    disease: {quantity: 1.4, generate: addDisease}, // disease starting in a random city
+    disaster: {quantity: 1, generate: addDisaster}, // disaster starting in a random city
+    eruption: {quantity: 1, generate: addEruption}, // eruption aroung volcano
+    avalanche: {quantity: 0.8, generate: addAvalanche}, // avalanche impacting highland road
+    fault: {quantity: 1, generate: addFault}, // fault line in elevated areas
+    flood: {quantity: 1, generate: addFlood}, // flood on river banks
+    tsunami: {quantity: 1, generate: addTsunami} // tsunami starting near coast
+  };
+
+  const generate = function (globalModifier = 1) {
+    TIME && console.time("generateZones");
+
+    const usedCells = new Uint8Array(pack.cells.i.length);
+    pack.zones = [];
+
+    Object.values(config).forEach(type => {
+      const expectedNumber = type.quantity * globalModifier;
+      let number = gauss(expectedNumber, expectedNumber / 2, 0, 100);
+      while (number--) type.generate(usedCells);
+    });
+
+    TIME && console.timeEnd("generateZones");
+  };
+
+  function addInvasion(usedCells) {
+    const {cells, states} = pack;
+
+    const ongoingConflicts = states
+      .filter(s => s.i && !s.removed && s.campaigns)
+      .map(s => s.campaigns)
+      .flat()
+      .filter(c => !c.end);
+    if (!ongoingConflicts.length) return;
+    const {defender, attacker} = ra(ongoingConflicts);
+
+    const borderCells = cells.i.filter(cellId => {
+      if (usedCells[cellId]) return false;
+      if (cells.state[cellId] !== defender) return false;
+      return cells.c[cellId].some(c => cells.state[c] === attacker);
+    });
+
+    const startCell = ra(borderCells);
+    if (startCell === undefined) return;
+
+    const invationCells = [];
+    const queue = [startCell];
+    const maxCells = rand(5, 30);
+
+    while (queue.length) {
+      const cellId = P(0.4) ? queue.shift() : queue.pop();
+      invationCells.push(cellId);
+      if (invationCells.length >= maxCells) break;
+
+      cells.c[cellId].forEach(neibCellId => {
+        if (usedCells[neibCellId]) return;
+        if (cells.state[neibCellId] !== defender) return;
+        usedCells[neibCellId] = 1;
+        queue.push(neibCellId);
+      });
+    }
+
+    const subtype = rw({
+      Invasion: 5,
+      Occupation: 4,
+      Conquest: 3,
+      Incursion: 2,
+      Intervention: 2,
+      Subjugation: 1,
+      Foray: 1,
+      Skirmishes: 1,
+      Pillaging: 1,
+      Raid: 1
+    });
+    const name = getAdjective(states[attacker].name) + " " + subtype;
+
+    pack.zones.push({i: pack.zones.length, name, type: "Invasion", cells: invationCells, color: "url(#hatch1)"});
+  }
+
+  function addRebels(usedCells) {
+    const {cells, states} = pack;
+
+    const state = ra(states.filter(s => s.i && !s.removed && s.neighbors.some(Boolean)));
+    if (!state) return;
+
+    const neibStateId = ra(state.neighbors.filter(n => n && !states[n].removed));
+    if (!neibStateId) return;
+
+    const cellsArray = [];
+    const queue = [];
+    const borderCellId = cells.i.find(
+      i => cells.state[i] === state.i && cells.c[i].some(c => cells.state[c] === neibStateId)
+    );
+    if (borderCellId) queue.push(borderCellId);
+    const maxCells = rand(10, 30);
+
+    while (queue.length) {
+      const cellId = queue.shift();
+      cellsArray.push(cellId);
+      if (cellsArray.length >= maxCells) break;
+
+      cells.c[cellId].forEach(neibCellId => {
+        if (usedCells[neibCellId]) return;
+        if (cells.state[neibCellId] !== state.i) return;
+        usedCells[neibCellId] = 1;
+        if (neibCellId % 4 !== 0 && !cells.c[neibCellId].some(c => cells.state[c] === neibStateId)) return;
+        queue.push(neibCellId);
+      });
+    }
+
+    const rebels = rw({
+      Rebels: 5,
+      Insurrection: 2,
+      Mutineers: 1,
+      Insurgents: 1,
+      Rioters: 1,
+      Separatists: 1,
+      Secessionists: 1,
+      Rebellion: 1,
+      Conspiracy: 1
+    });
+
+    const name = getAdjective(states[neibStateId].name) + " " + rebels;
+    pack.zones.push({i: pack.zones.length, name, type: "Rebels", cells: cellsArray, color: "url(#hatch3)"});
+  }
+
+  function addProselytism(usedCells) {
+    const {cells, religions} = pack;
+
+    const organizedReligions = religions.filter(r => r.i && !r.removed && r.type === "Organized");
+    const religion = ra(organizedReligions);
+    if (!religion) return;
+
+    const targetBorderCells = cells.i.filter(
+      i =>
+        cells.h[i] < 20 &&
+        cells.pop[i] &&
+        cells.religion[i] !== religion.i &&
+        cells.c[i].some(c => cells.religion[c] === religion.i)
+    );
+    const startCell = ra(targetBorderCells);
+    if (!startCell) return;
+
+    const targetReligionId = cells.religion[startCell];
+    const proselytismCells = [];
+    const queue = [startCell];
+    const maxCells = rand(10, 30);
+
+    while (queue.length) {
+      const cellId = queue.shift();
+      proselytismCells.push(cellId);
+      if (proselytismCells.length >= maxCells) break;
+
+      cells.c[cellId].forEach(neibCellId => {
+        if (usedCells[neibCellId]) return;
+        if (cells.religion[neibCellId] !== targetReligionId) return;
+        if (cells.h[neibCellId] < 20 || !cells.pop[i]) return;
+        usedCells[neibCellId] = 1;
+        queue.push(neibCellId);
+      });
+    }
+
+    const name = `${getAdjective(religion.name.split(" ")[0])} Proselytism`;
+    pack.zones.push({i: pack.zones.length, name, type: "Proselytism", cells: proselytismCells, color: "url(#hatch6)"});
+  }
+
+  function addCrusade(usedCells) {
+    const {cells, religions} = pack;
+
+    const heresies = religions.filter(r => !r.removed && r.type === "Heresy");
+    if (!heresies.length) return;
+
+    const heresy = ra(heresies);
+    const crusadeCells = cells.i.filter(i => !usedCells[i] && cells.religion[i] === heresy.i);
+    if (!crusadeCells.length) return;
+    crusadeCells.forEach(i => (usedCells[i] = 1));
+
+    const name = getAdjective(heresy.name.split(" ")[0]) + " Crusade";
+    pack.zones.push({
+      i: pack.zones.length,
+      name,
+      type: "Crusade",
+      cells: Array.from(crusadeCells),
+      color: "url(#hatch6)"
+    });
+  }
+
+  function addDisease(usedCells) {
+    const {cells, burgs} = pack;
+
+    const burg = ra(burgs.filter(b => !usedCells[b.cell] && b.i && !b.removed)); // random burg
+    if (!burg) return;
+
+    const cellsArray = [];
+    const cost = [];
+    const maxCells = rand(20, 40);
+
+    const queue = new PriorityQueue({comparator: (a, b) => a.p - b.p});
+    queue.queue({e: burg.cell, p: 0});
+
+    while (queue.length) {
+      const next = queue.dequeue();
+      if (cells.burg[next.e] || cells.pop[next.e]) cellsArray.push(next.e);
+      usedCells[next.e] = 1;
+
+      cells.c[next.e].forEach(nextCellId => {
+        const c = Routes.getRoute(next.e, nextCellId) ? 5 : 100;
+        const p = next.p + c;
+        if (p > maxCells) return;
+
+        if (!cost[nextCellId] || p < cost[nextCellId]) {
+          cost[nextCellId] = p;
+          queue.queue({e: nextCellId, p});
+        }
+      });
+    }
+
+    // prettier-ignore
+    const name = `${(() => {
+      const model = rw({color: 2, animal: 1, adjective: 1});
+      if (model === "color") return ra(["Amber", "Azure", "Black", "Blue", "Brown", "Crimson", "Emerald", "Golden", "Green", "Grey", "Orange", "Pink", "Purple", "Red", "Ruby", "Scarlet", "Silver", "Violet", "White", "Yellow"]);
+      if (model === "animal") return ra(["Ape", "Bear", "Bird", "Boar", "Cat", "Cow", "Dog", "Fox", "Horse", "Lion", "Pig", "Rat", "Raven", "Sheep", "Spider", "Tiger", "Viper", "Wolf", "Worm", "Wyrm"]);
+      if (model === "adjective") return ra(["Blind", "Bloody", "Brutal", "Burning", "Deadly", "Fatal", "Furious", "Great", "Grim", "Horrible", "Invisible", "Lethal", "Loud", "Mortal", "Savage", "Severe", "Silent", "Unknown", "Venomous", "Vicious"]);
+    })()} ${rw({Fever: 5, Plague: 3, Cough: 3, Flu: 2, Pox: 2, Cholera: 2, Typhoid: 2, Leprosy: 1, Smallpox: 1, Pestilence: 1, Consumption: 1, Malaria: 1, Dropsy: 1})}`;
+
+    pack.zones.push({i: pack.zones.length, name, type: "Disease", cells: cellsArray, color: "url(#hatch12)"});
+  }
+
+  function addDisaster(usedCells) {
+    const {cells, burgs} = pack;
+
+    const burg = ra(burgs.filter(b => !usedCells[b.cell] && b.i && !b.removed));
+    if (!burg) return;
+    usedCells[burg.cell] = 1;
+
+    const cellsArray = [];
+    const cost = [];
+    const maxCells = rand(5, 25);
+
+    const queue = new PriorityQueue({comparator: (a, b) => a.p - b.p});
+    queue.queue({e: burg.cell, p: 0});
+
+    while (queue.length) {
+      const next = queue.dequeue();
+      if (cells.burg[next.e] || cells.pop[next.e]) cellsArray.push(next.e);
+      usedCells[next.e] = 1;
+
+      cells.c[next.e].forEach(function (e) {
+        const c = rand(1, 10);
+        const p = next.p + c;
+        if (p > maxCells) return;
+
+        if (!cost[e] || p < cost[e]) {
+          cost[e] = p;
+          queue.queue({e, p});
+        }
+      });
+    }
+
+    const type = rw({
+      Famine: 5,
+      Drought: 3,
+      Earthquake: 3,
+      Dearth: 1,
+      Tornadoes: 1,
+      Wildfires: 1,
+      Storms: 1,
+      Blight: 1
+    });
+    const name = getAdjective(burg.name) + " " + type;
+    pack.zones.push({i: pack.zones.length, name, type: "Disaster", cells: cellsArray, color: "url(#hatch5)"});
+  }
+
+  function addEruption(usedCells) {
+    const {cells, markers} = pack;
+
+    const volcanoe = markers.find(m => m.type === "volcanoes" && !usedCells[m.cell]);
+    if (!volcanoe) return;
+    usedCells[volcanoe.cell] = 1;
+
+    const note = notes.find(n => n.id === "marker" + volcanoe.i);
+    if (note) note.legend = note.legend.replace("Active volcano", "Erupting volcano");
+    const name = note ? note.name.replace(" Volcano", "") + " Eruption" : "Volcano Eruption";
+
+    const cellsArray = [];
+    const queue = [volcanoe.cell];
+    const maxCells = rand(10, 30);
+
+    while (queue.length) {
+      const cellId = P(0.5) ? queue.shift() : queue.pop();
+      cellsArray.push(cellId);
+      if (cellsArray.length >= maxCells) break;
+
+      cells.c[cellId].forEach(neibCellId => {
+        if (usedCells[neibCellId] || cells.h[neibCellId] < 20) return;
+        usedCells[neibCellId] = 1;
+        queue.push(neibCellId);
+      });
+    }
+
+    pack.zones.push({i: pack.zones.length, name, type: "Eruption", cells: cellsArray, color: "url(#hatch7)"});
+  }
+
+  function addAvalanche(usedCells) {
+    const {cells} = pack;
+
+    const routeCells = cells.i.filter(i => !usedCells[i] && Routes.isConnected(i) && cells.h[i] >= 70);
+    if (!routeCells.length) return;
+
+    const startCell = ra(routeCells);
+    usedCells[startCell] = 1;
+
+    const cellsArray = [];
+    const queue = [startCell];
+    const maxCells = rand(3, 15);
+
+    while (queue.length) {
+      const cellId = P(0.3) ? queue.shift() : queue.pop();
+      cellsArray.push(cellId);
+      if (cellsArray.length >= maxCells) break;
+
+      cells.c[cellId].forEach(neibCellId => {
+        if (usedCells[neibCellId] || cells.h[neibCellId] < 65) return;
+        usedCells[neibCellId] = 1;
+        queue.push(neibCellId);
+      });
+    }
+
+    const name = getAdjective(Names.getCultureShort(cells.culture[startCell])) + " Avalanche";
+    pack.zones.push({i: pack.zones.length, name, type: "Avalanche", cells: cellsArray, color: "url(#hatch5)"});
+  }
+
+  function addFault(usedCells) {
+    const cells = pack.cells;
+
+    const elevatedCells = cells.i.filter(i => !usedCells[i] && cells.h[i] > 50 && cells.h[i] < 70);
+    if (!elevatedCells.length) return;
+
+    const startCell = ra(elevatedCells);
+    usedCells[startCell] = 1;
+
+    const cellsArray = [];
+    const queue = [startCell];
+    const maxCells = rand(3, 15);
+
+    while (queue.length) {
+      const cellId = queue.pop();
+      if (cells.h[cellId] >= 20) cellsArray.push(cellId);
+      if (cellsArray.length >= maxCells) break;
+
+      cells.c[cellId].forEach(neibCellId => {
+        if (usedCells[neibCellId] || cells.r[neibCellId]) return;
+        usedCells[neibCellId] = 1;
+        queue.push(neibCellId);
+      });
+    }
+
+    const name = getAdjective(Names.getCultureShort(cells.culture[startCell])) + " Fault";
+    pack.zones.push({i: pack.zones.length, name, type: "Fault", cells: cellsArray, color: "url(#hatch2)"});
+  }
+
+  function addFlood(usedCells) {
+    const cells = pack.cells;
+
+    const fl = cells.fl.filter(Boolean);
+    const meanFlux = d3.mean(fl);
+    const maxFlux = d3.max(fl);
+    const fluxThreshold = (maxFlux - meanFlux) / 2 + meanFlux;
+
+    const bigRiverCells = cells.i.filter(
+      i => !usedCells[i] && cells.h[i] < 50 && cells.r[i] && cells.fl[i] > fluxThreshold && cells.burg[i]
+    );
+    if (!bigRiverCells.length) return;
+
+    const startCell = ra(bigRiverCells);
+    usedCells[startCell] = 1;
+
+    const riverId = cells.r[startCell];
+    const cellsArray = [];
+    const queue = [startCell];
+    const maxCells = rand(5, 30);
+
+    while (queue.length) {
+      const cellId = queue.pop();
+      cellsArray.push(cellId);
+      if (cellsArray.length >= maxCells) break;
+
+      cells.c[cellId].forEach(neibCellId => {
+        if (
+          usedCells[neibCellId] ||
+          cells.h[neibCellId] < 20 ||
+          cells.r[neibCellId] !== riverId ||
+          cells.h[neibCellId] > 50 ||
+          cells.fl[neibCellId] < meanFlux
+        )
+          return;
+        usedCells[neibCellId] = 1;
+        queue.push(neibCellId);
+      });
+    }
+
+    const name = getAdjective(pack.burgs[cells.burg[startCell]].name) + " Flood";
+    pack.zones.push({i: pack.zones.length, name, type: "Flood", cells: cellsArray, color: "url(#hatch13)"});
+  }
+
+  function addTsunami(usedCells) {
+    const {cells, features} = pack;
+
+    const coastalCells = cells.i.filter(
+      i => !usedCells[i] && cells.t[i] === -1 && features[cells.f[i]].type !== "lake"
+    );
+    if (!coastalCells.length) return;
+
+    const startCell = ra(coastalCells);
+    usedCells[startCell] = 1;
+
+    const cellsArray = [];
+    const queue = [startCell];
+    const maxCells = rand(10, 30);
+
+    while (queue.length) {
+      const cellId = queue.shift();
+      if (cells.t[cellId] === 1) cellsArray.push(cellId);
+      if (cellsArray.length >= maxCells) break;
+
+      cells.c[cellId].forEach(neibCellId => {
+        if (usedCells[neibCellId]) return;
+        if (cells.t[neibCellId] > 2) return;
+        if (pack.features[cells.f[neibCellId]].type === "lake") return;
+        usedCells[neibCellId] = 1;
+        queue.push(neibCellId);
+      });
+    }
+
+    const name = getAdjective(Names.getCultureShort(cells.culture[startCell])) + " Tsunami";
+    pack.zones.push({i: pack.zones.length, name, type: "Tsunami", cells: cellsArray, color: "url(#hatch13)"});
+  }
+
+  return {generate};
+})();
diff --git a/utils/pathUtils.js b/utils/pathUtils.js
new file mode 100644
index 00000000..ff3bbf2a
--- /dev/null
+++ b/utils/pathUtils.js
@@ -0,0 +1,155 @@
+"use strict";
+
+// get continuous paths for all cells at once based on getType(cellId) comparison
+function getVertexPaths({getType, options}) {
+  const {cells, vertices} = pack;
+  const paths = {};
+
+  const checkedCells = new Uint8Array(cells.c.length);
+  const addToChecked = cellId => (checkedCells[cellId] = 1);
+  const isChecked = cellId => checkedCells[cellId] === 1;
+
+  for (let cellId = 0; cellId < cells.c.length; cellId++) {
+    if (isChecked(cellId) || getType(cellId) === 0) continue;
+    addToChecked(cellId);
+
+    const type = getType(cellId);
+    const ofSameType = cellId => getType(cellId) === type;
+    const ofDifferentType = cellId => getType(cellId) !== type;
+
+    const onborderCell = cells.c[cellId].find(ofDifferentType);
+    if (onborderCell === undefined) continue;
+
+    const feature = pack.features[cells.f[onborderCell]];
+    if (feature.type === "lake" && feature.shoreline.every(ofSameType)) continue; // inner lake
+
+    const startingVertex = cells.v[cellId].find(v => vertices.c[v].some(ofDifferentType));
+    if (startingVertex === undefined) throw new Error(`Starting vertex for cell ${cellId} is not found`);
+
+    const vertexChain = connectVertices({startingVertex, ofSameType, addToChecked, closeRing: true});
+    if (vertexChain.length < 3) continue;
+
+    addPath(type, vertexChain);
+  }
+
+  return Object.entries(paths);
+
+  function getBorderPath(vertexChain, discontinue) {
+    let discontinued = true;
+    let lastOperation = "";
+    const path = vertexChain.map(vertex => {
+      if (discontinue(vertex)) {
+        discontinued = true;
+        return "";
+      }
+
+      const operation = discontinued ? "M" : "L";
+      const command = operation === lastOperation ? "" : operation;
+
+      discontinued = false;
+      lastOperation = operation;
+
+      return ` ${command}${getVertexPoint(vertex)}`;
+    });
+
+    return path.join("").trim();
+  }
+
+  function isBorderVertex(vertex) {
+    const adjacentCells = vertices.c[vertex];
+    return adjacentCells.some(i => cells.b[i]);
+  }
+
+  function isLandVertex(vertex) {
+    const adjacentCells = vertices.c[vertex];
+    return adjacentCells.every(i => cells.h[i] >= MIN_LAND_HEIGHT);
+  }
+
+  function addPath(index, vertexChain) {
+    if (!paths[index]) paths[index] = {fill: "", waterGap: "", halo: ""};
+    if (options.fill) paths[index].fill += getFillPath(vertexChain);
+    if (options.halo) paths[index].halo += getBorderPath(vertexChain, isBorderVertex);
+    if (options.waterGap) paths[index].waterGap += getBorderPath(vertexChain, isLandVertex);
+  }
+}
+
+function getVertexPoint(vertexId) {
+  return pack.vertices.p[vertexId];
+}
+
+function getFillPath(vertexChain) {
+  const points = vertexChain.map(getVertexPoint);
+  const firstPoint = points.shift();
+  return `M${firstPoint} L${points.join(" ")}`;
+}
+
+// get single path for an non-continuous array of cells
+function getVertexPath(cellsArray) {
+  const {cells, vertices} = pack;
+
+  const cellsObj = Object.fromEntries(cellsArray.map(cellId => [cellId, true]));
+  const ofSameType = cellId => cellsObj[cellId];
+  const ofDifferentType = cellId => !cellsObj[cellId];
+
+  const checkedCells = new Uint8Array(cells.c.length);
+  const addToChecked = cellId => (checkedCells[cellId] = 1);
+  const isChecked = cellId => checkedCells[cellId] === 1;
+
+  let path = "";
+
+  for (const cellId of cellsArray) {
+    if (isChecked(cellId)) continue;
+
+    const onborderCell = cells.c[cellId].find(ofDifferentType);
+    if (onborderCell === undefined) continue;
+
+    const feature = pack.features[cells.f[onborderCell]];
+    if (feature.type === "lake" && feature.shoreline.every(ofSameType)) continue; // inner lake
+
+    const startingVertex = cells.v[cellId].find(v => vertices.c[v].some(ofDifferentType));
+    if (startingVertex === undefined) throw new Error(`Starting vertex for cell ${cellId} is not found`);
+
+    const vertexChain = connectVertices({startingVertex, ofSameType, addToChecked, closeRing: true});
+    if (vertexChain.length < 3) continue;
+
+    path += getFillPath(vertexChain);
+  }
+
+  return path;
+}
+
+function connectVertices({startingVertex, ofSameType, addToChecked, closeRing}) {
+  const vertices = pack.vertices;
+  const MAX_ITERATIONS = pack.cells.i.length;
+  const chain = []; // vertices chain to form a path
+
+  let next = startingVertex;
+  for (let i = 0; i === 0 || next !== startingVertex; i++) {
+    const previous = chain.at(-1);
+    const current = next;
+    chain.push(current);
+
+    const neibCells = vertices.c[current];
+    if (addToChecked) neibCells.filter(ofSameType).forEach(addToChecked);
+
+    const [c1, c2, c3] = neibCells.map(ofSameType);
+    const [v1, v2, v3] = vertices.v[current];
+
+    if (v1 !== previous && c1 !== c2) next = v1;
+    else if (v2 !== previous && c2 !== c3) next = v2;
+    else if (v3 !== previous && c1 !== c3) next = v3;
+
+    if (next === current) {
+      ERROR && console.error("ConnectVertices: next vertex is not found");
+      break;
+    }
+
+    if (i === MAX_ITERATIONS) {
+      ERROR && console.error("ConnectVertices: max iterations reached", MAX_ITERATIONS);
+      break;
+    }
+  }
+
+  if (closeRing) chain.push(startingVertex);
+  return chain;
+}
diff --git a/versioning.js b/versioning.js
index 41199755..c8acea04 100644
--- a/versioning.js
+++ b/versioning.js
@@ -1,21 +1,26 @@
 "use strict";
-
-// version and caching control
-const version = "1.99.15"; // generator version, update each time
+/**
+ * Version Control Guidelines
+ * --------------------------
+ * We use Semantic Versioning: major.minor.patch. Refer to https://semver.org
+ * Our .map file format is considered the public API.
+ *
+ * Update the version MANUALLY on each merge to main:
+ * 1. MAJOR version: Incompatible changes that break existing maps
+ * 2. MINOR version: Backwards-compatible changes requiring old .map files to be updated
+ * 3. PATCH version: Backwards-compatible bug fixes not affecting .map file format
+ *
+ * Example: 1.102.0 -> Major version 1, Minor version 102, Patch version 0
+ */
+const VERSION = "1.100.00";
 
 {
-  document.title += " v" + version;
+  document.title += " v" + VERSION;
   const loadingScreenVersion = document.getElementById("versionText");
-  if (loadingScreenVersion) loadingScreenVersion.innerText = `v${version}`;
+  if (loadingScreenVersion) loadingScreenVersion.innerText = `v${VERSION}`;
 
-  const versionNumber = parseFloat(version);
-  const storedVersion = localStorage.getItem("version") ? parseFloat(localStorage.getItem("version")) : 0;
-
-  const isOutdated = storedVersion !== versionNumber;
-  if (isOutdated) clearCache();
-
-  const showUpdate = storedVersion < versionNumber;
-  if (showUpdate) setTimeout(showUpdateWindow, 6000);
+  const storedVersion = localStorage.getItem("version");
+  if (compareVersions(storedVersion, VERSION).isOlder) setTimeout(showUpdateWindow, 6000);
 
   function showUpdateWindow() {
     const changelog = "https://github.com/Azgaar/Fantasy-Map-Generator/wiki/Changelog";
@@ -23,11 +28,12 @@ const version = "1.99.15"; // generator version, update each time
     const discord = "https://discordapp.com/invite/X7E84HU";
     const patreon = "https://www.patreon.com/azgaar";
 
-    alertMessage.innerHTML = /* html */ `The Fantasy Map Generator is updated up to version <strong>${version}</strong>. This version is compatible with <a href="${changelog}" target="_blank">previous versions</a>, loaded save files will be auto-updated.
-      ${storedVersion ? "<span>Reload the page to fetch fresh code.</span>" : ""}
+    alertMessage.innerHTML = /* html */ `The Fantasy Map Generator is updated up to version <strong>${VERSION}</strong>. This version is compatible with <a href="${changelog}" target="_blank">previous versions</a>, loaded save files will be auto-updated.
+      ${storedVersion ? "<span>Click on OK and then reload the page to fetch fresh code.</span>" : ""}
 
       <ul>
         <strong>Latest changes:</strong>
+        <li>Zones update</li>
         <li>Notes Editor: on-demand AI text generation</li>
         <li>New style preset: Dark Seas</li>
         <li>New routes generation algorithm</li>
@@ -51,15 +57,19 @@ const version = "1.99.15"; // generator version, update each time
     const buttons = {
       Ok: function () {
         $(this).dialog("close");
-        if (storedVersion) localStorage.clear();
-        localStorage.setItem("version", version);
+        if (storedVersion) {
+          clearCache();
+          localStorage.clear();
+        }
+        localStorage.setItem("version", VERSION);
       }
     };
 
     if (storedVersion) {
       buttons.Reload = () => {
+        clearCache();
         localStorage.clear();
-        localStorage.setItem("version", version);
+        localStorage.setItem("version", VERSION);
         location.reload();
       };
     }
@@ -75,6 +85,25 @@ const version = "1.99.15"; // generator version, update each time
 
   async function clearCache() {
     const cacheNames = await caches.keys();
-    Promise.all(cacheNames.map(cacheName => caches.delete(cacheName)));
+    return Promise.all(cacheNames.map(cacheName => caches.delete(cacheName)));
   }
 }
+
+function isValidVersion(versionString) {
+  if (!versionString) return false;
+  const [major, minor, patch] = versionString.split(".");
+  return !isNaN(major) && !isNaN(minor) && !isNaN(patch);
+}
+
+function compareVersions(version1, version2) {
+  if (!isValidVersion(version1) || !isValidVersion(version2)) return {isEqual: false, isNewer: false, isOlder: false};
+
+  const [major1, minor1, patch1] = version1.split(".").map(Number);
+  const [major2, minor2, patch2] = version2.split(".").map(Number);
+
+  const isEqual = major1 === major2 && minor1 === minor2 && patch1 === patch2;
+  const isNewer = major1 > major2 || (major1 === major2 && (minor1 > minor2 || (minor1 === minor2 && patch1 > patch2)));
+  const isOlder = major1 < major2 || (major1 === major2 && (minor1 < minor2 || (minor1 === minor2 && patch1 < patch2)));
+
+  return {isEqual, isNewer, isOlder};
+}