diff --git a/src/client/HelpModal.ts b/src/client/HelpModal.ts
index 64ffdcd4e..591f9d724 100644
--- a/src/client/HelpModal.ts
+++ b/src/client/HelpModal.ts
@@ -1,5 +1,5 @@
-import { LitElement, html, css } from "lit";
-import { customElement, property, state } from "lit/decorators.js";
+import { LitElement, css, html } from "lit";
+import { customElement, state } from "lit/decorators.js";
 import "./components/Difficulties";
 import "./components/Maps";
 
@@ -236,6 +236,10 @@ export class HelpModal extends LitElement {
                   <td>1 / 2</td>
                   <td>Decrease/Increase attack ratio</td>
                 </tr>
+                <tr>
+                  <td>Shift + scroll down / scroll up</td>
+                  <td>Decrease/Increase attack ratio</td>
+                </tr>
                 <tr>
                   <td>ALT + R</td>
                   <td>Reset graphics</td>
diff --git a/src/client/Transport.ts b/src/client/Transport.ts
index c4fd5f700..cc6c9daf5 100644
--- a/src/client/Transport.ts
+++ b/src/client/Transport.ts
@@ -100,6 +100,14 @@ export class SendDonateIntentEvent implements GameEvent {
   ) {}
 }
 
+export class SendEmbargoIntentEvent implements GameEvent {
+  constructor(
+    public readonly sender: PlayerView,
+    public readonly target: PlayerView,
+    public readonly action: "start" | "stop",
+  ) {}
+}
+
 export class SendSetTargetTroopRatioEvent implements GameEvent {
   constructor(public readonly ratio: number) {}
 }
@@ -151,6 +159,9 @@ export class Transport {
     );
     this.eventBus.on(SendEmojiIntentEvent, (e) => this.onSendEmojiIntent(e));
     this.eventBus.on(SendDonateIntentEvent, (e) => this.onSendDonateIntent(e));
+    this.eventBus.on(SendEmbargoIntentEvent, (e) =>
+      this.onSendEmbargoIntent(e),
+    );
     this.eventBus.on(SendSetTargetTroopRatioEvent, (e) =>
       this.onSendSetTargetTroopRatioEvent(e),
     );
@@ -397,6 +408,16 @@ export class Transport {
     });
   }
 
+  private onSendEmbargoIntent(event: SendEmbargoIntentEvent) {
+    this.sendIntent({
+      type: "embargo",
+      clientID: this.lobbyConfig.clientID,
+      playerID: this.lobbyConfig.playerID,
+      targetID: event.target.id(),
+      action: event.action,
+    });
+  }
+
   private onSendSetTargetTroopRatioEvent(event: SendSetTargetTroopRatioEvent) {
     this.sendIntent({
       type: "troop_ratio",
diff --git a/src/client/graphics/layers/PlayerPanel.ts b/src/client/graphics/layers/PlayerPanel.ts
index bfd0c4c19..50d4ffc76 100644
--- a/src/client/graphics/layers/PlayerPanel.ts
+++ b/src/client/graphics/layers/PlayerPanel.ts
@@ -18,6 +18,7 @@ import {
   SendDonateIntentEvent,
   SendEmojiIntentEvent,
   SendTargetPlayerIntentEvent,
+  SendEmbargoIntentEvent,
 } from "../../Transport";
 import { EmojiTable } from "./EmojiTable";
 
@@ -76,6 +77,26 @@ export class PlayerPanel extends LitElement implements Layer {
     this.hide();
   }
 
+  private handleEmbargoClick(
+    e: Event,
+    myPlayer: PlayerView,
+    other: PlayerView,
+  ) {
+    e.stopPropagation();
+    this.eventBus.emit(new SendEmbargoIntentEvent(myPlayer, other, "start"));
+    this.hide();
+  }
+
+  private handleStopEmbargoClick(
+    e: Event,
+    myPlayer: PlayerView,
+    other: PlayerView,
+  ) {
+    e.stopPropagation();
+    this.eventBus.emit(new SendEmbargoIntentEvent(myPlayer, other, "stop"));
+    this.hide();
+  }
+
   private handleEmojiClick(e: Event, myPlayer: PlayerView, other: PlayerView) {
     e.stopPropagation();
     this.emojiTable.showTable((emoji: string) => {
@@ -131,6 +152,7 @@ export class PlayerPanel extends LitElement implements Layer {
         : this.actions.interaction?.canSendEmoji;
     const canBreakAlliance = this.actions.interaction?.canBreakAlliance;
     const canTarget = this.actions.interaction?.canTarget;
+    const canEmbargo = this.actions.interaction?.canEmbargo;
 
     return html`
       <div
@@ -190,6 +212,15 @@ export class PlayerPanel extends LitElement implements Layer {
               </div>
             </div>
 
+            <div class="flex flex-col gap-1">
+              <div class="text-white text-opacity-80 text-sm px-2">
+                Embargo against you
+              </div>
+              <div class="bg-opacity-50 bg-gray-700 rounded p-2 text-white">
+                ${other.hasEmbargoAgainst(myPlayer) ? "Yes" : "No"}
+              </div>
+            </div>
+
             <!-- Action buttons -->
             <div class="flex justify-center gap-2">
               ${canTarget
@@ -249,6 +280,27 @@ export class PlayerPanel extends LitElement implements Layer {
                   </button>`
                 : ""}
             </div>
+            ${canEmbargo && other != myPlayer
+              ? html`<button
+                  @click=${(e) => this.handleEmbargoClick(e, myPlayer, other)}
+                  class="w-100 h-10 flex items-center justify-center
+                          bg-opacity-50 bg-gray-700 hover:bg-opacity-70
+                          text-white rounded-lg transition-colors"
+                >
+                  Start embargo
+                </button>`
+              : ""}
+            ${!canEmbargo && other != myPlayer
+              ? html`<button
+                  @click=${(e) =>
+                    this.handleStopEmbargoClick(e, myPlayer, other)}
+                  class="w-100 h-10 flex items-center justify-center
+                          bg-opacity-50 bg-gray-700 hover:bg-opacity-70
+                          text-white rounded-lg transition-colors"
+                >
+                  Stop embargo
+                </button>`
+              : ""}
           </div>
         </div>
       </div>
diff --git a/src/core/GameRunner.ts b/src/core/GameRunner.ts
index 56c0e7e65..469122381 100644
--- a/src/core/GameRunner.ts
+++ b/src/core/GameRunner.ts
@@ -167,6 +167,7 @@ export class GameRunner {
         canSendAllianceRequest: player.canSendAllianceRequest(other),
         canBreakAlliance: player.isAlliedWith(other),
         canDonate: player.canDonate(other),
+        canEmbargo: !player.hasEmbargoAgainst(other),
       };
     }
 
diff --git a/src/core/Schemas.ts b/src/core/Schemas.ts
index 8ea615139..e7a8933b9 100644
--- a/src/core/Schemas.ts
+++ b/src/core/Schemas.ts
@@ -22,7 +22,8 @@ export type Intent =
   | EmojiIntent
   | DonateIntent
   | TargetTroopRatioIntent
-  | BuildUnitIntent;
+  | BuildUnitIntent
+  | EmbargoIntent;
 
 export type AttackIntent = z.infer<typeof AttackIntentSchema>;
 export type SpawnIntent = z.infer<typeof SpawnIntentSchema>;
@@ -35,6 +36,7 @@ export type BreakAllianceIntent = z.infer<typeof BreakAllianceIntentSchema>;
 export type TargetPlayerIntent = z.infer<typeof TargetPlayerIntentSchema>;
 export type EmojiIntent = z.infer<typeof EmojiIntentSchema>;
 export type DonateIntent = z.infer<typeof DonateIntentSchema>;
+export type EmbargoIntent = z.infer<typeof EmbargoIntentSchema>;
 export type TargetTroopRatioIntent = z.infer<
   typeof TargetTroopRatioIntentSchema
 >;
@@ -133,6 +135,7 @@ const BaseIntentSchema = z.object({
     "emoji",
     "troop_ratio",
     "build_unit",
+    "embargo",
   ]),
   clientID: ID,
   playerID: ID,
@@ -196,6 +199,13 @@ export const EmojiIntentSchema = BaseIntentSchema.extend({
   emoji: EmojiSchema,
 });
 
+export const EmbargoIntentSchema = BaseIntentSchema.extend({
+  type: z.literal("embargo"),
+  playerID: ID,
+  targetID: ID,
+  action: z.union([z.literal("start"), z.literal("stop")]),
+});
+
 export const DonateIntentSchema = BaseIntentSchema.extend({
   type: z.literal("donate"),
   playerID: ID,
@@ -229,6 +239,7 @@ const IntentSchema = z.union([
   DonateIntentSchema,
   TargetTroopRatioIntentSchema,
   BuildUnitIntentSchema,
+  EmbargoIntentSchema,
 ]);
 
 export const TurnSchema = z.object({
diff --git a/src/core/execution/EmbargoExecution.ts b/src/core/execution/EmbargoExecution.ts
new file mode 100644
index 000000000..a37fe20f6
--- /dev/null
+++ b/src/core/execution/EmbargoExecution.ts
@@ -0,0 +1,44 @@
+import { consolex } from "../Consolex";
+import { Execution, Game, Player, PlayerID } from "../game/Game";
+
+export class EmbargoExecution implements Execution {
+  private active = true;
+
+  constructor(
+    private player: Player,
+    private targetID: PlayerID,
+    private readonly action: "start" | "stop",
+  ) {}
+
+  init(mg: Game, _: number): void {
+    if (!mg.hasPlayer(this.player.id())) {
+      console.warn(`EmbargoExecution: sender ${this.player.id()} not found`);
+      this.active = false;
+      return;
+    }
+    if (!mg.hasPlayer(this.targetID)) {
+      console.warn(`EmbargoExecution recipient ${this.targetID} not found`);
+      this.active = false;
+      return;
+    }
+  }
+
+  tick(_: number): void {
+    if (this.action == "start") this.player.addEmbargo(this.targetID);
+    else this.player.stopEmbargo(this.targetID);
+
+    this.active = false;
+  }
+
+  owner(): Player {
+    return null;
+  }
+
+  isActive(): boolean {
+    return this.active;
+  }
+
+  activeDuringSpawnPhase(): boolean {
+    return false;
+  }
+}
diff --git a/src/core/execution/ExecutionManager.ts b/src/core/execution/ExecutionManager.ts
index e876c9cac..c6b84e850 100644
--- a/src/core/execution/ExecutionManager.ts
+++ b/src/core/execution/ExecutionManager.ts
@@ -34,6 +34,7 @@ import { SetTargetTroopRatioExecution } from "./SetTargetTroopRatioExecution";
 import { ConstructionExecution } from "./ConstructionExecution";
 import { fixProfaneUsername, isProfaneUsername } from "../validations/username";
 import { NoOpExecution } from "./NoOpExecution";
+import { EmbargoExecution } from "./EmbargoExecution";
 
 export class Executor {
   // private random = new PseudoRandom(999)
@@ -53,6 +54,7 @@ export class Executor {
   }
 
   createExec(intent: Intent): Execution {
+    let player: Player;
     if (intent.type != "spawn") {
       if (!this.mg.hasPlayer(intent.playerID)) {
         console.warn(
@@ -60,7 +62,7 @@ export class Executor {
         );
         return new NoOpExecution();
       }
-      const player = this.mg.player(intent.playerID);
+      player = this.mg.player(intent.playerID);
       if (player.clientID() != intent.clientID) {
         console.warn(
           `intent ${intent.type} has incorrect clientID ${intent.clientID} for player ${player.name()} with clientID ${player.clientID()}`,
@@ -68,6 +70,7 @@ export class Executor {
         return new NoOpExecution();
       }
     }
+
     switch (intent.type) {
       case "attack": {
         return new AttackExecution(
@@ -124,6 +127,8 @@ export class Executor {
         );
       case "troop_ratio":
         return new SetTargetTroopRatioExecution(intent.playerID, intent.ratio);
+      case "embargo":
+        return new EmbargoExecution(player, intent.targetID, intent.action);
       case "build_unit":
         return new ConstructionExecution(
           intent.playerID,
diff --git a/src/core/execution/PortExecution.ts b/src/core/execution/PortExecution.ts
index 18053299a..562f03450 100644
--- a/src/core/execution/PortExecution.ts
+++ b/src/core/execution/PortExecution.ts
@@ -69,22 +69,20 @@ export class PortExecution implements Execution {
       return;
     }
 
-    const alliedPorts = this.player()
-      .alliances()
-      .map((a) => a.other(this.player()))
+    const tradingPartnersPorts = this.player()
+      .tradingPartners()
       .flatMap((p) => p.units(UnitType.Port));
-    const alliedPortsSet = new Set(alliedPorts);
+    const tradingPartnersPortsSet = new Set(tradingPartnersPorts);
 
-    const allyConnections = new Set(
+    const tradingPartnersConnections = new Set(
       Array.from(this.portPaths.keys()).map((p) => p.owner()),
     );
-    allyConnections;
 
-    for (const port of alliedPorts) {
-      if (allyConnections.has(port.owner())) {
+    for (const port of tradingPartnersPorts) {
+      if (tradingPartnersConnections.has(port.owner())) {
         continue;
       }
-      allyConnections.add(port.owner());
+      tradingPartnersConnections.add(port.owner());
       if (this.computingPaths.has(port)) {
         const aStar = this.computingPaths.get(port);
         switch (aStar.compute()) {
@@ -114,7 +112,7 @@ export class PortExecution implements Execution {
     }
 
     for (const port of this.portPaths.keys()) {
-      if (!port.isActive() || !alliedPortsSet.has(port)) {
+      if (!port.isActive() || !tradingPartnersPortsSet.has(port)) {
         this.portPaths.delete(port);
         this.computingPaths.delete(port);
       }
diff --git a/src/core/execution/TradeShipExecution.ts b/src/core/execution/TradeShipExecution.ts
index 022aa30e7..43bb70b10 100644
--- a/src/core/execution/TradeShipExecution.ts
+++ b/src/core/execution/TradeShipExecution.ts
@@ -27,7 +27,7 @@ export class TradeShipExecution implements Execution {
   constructor(
     private _owner: PlayerID,
     private srcPort: Unit,
-    private dstPort: Unit,
+    private _dstPort: Unit,
     private pathFinder: PathFinder,
     // don't modify
     private path: TileRef[],
@@ -49,7 +49,12 @@ export class TradeShipExecution implements Execution {
         this.active = false;
         return;
       }
-      this.tradeShip = this.origOwner.buildUnit(UnitType.TradeShip, 0, spawn);
+      this.tradeShip = this.origOwner.buildUnit(
+        UnitType.TradeShip,
+        0,
+        spawn,
+        this._dstPort,
+      );
     }
 
     if (!this.tradeShip.isActive()) {
@@ -64,8 +69,8 @@ export class TradeShipExecution implements Execution {
 
     if (
       !this.wasCaptured &&
-      (!this.dstPort.isActive() ||
-        !this.tradeShip.owner().isAlliedWith(this.dstPort.owner()))
+      (!this._dstPort.isActive() ||
+        !this.tradeShip.owner().canTrade(this._dstPort.owner()))
     ) {
       this.tradeShip.delete(false);
       this.active = false;
@@ -122,17 +127,17 @@ export class TradeShipExecution implements Execution {
       const gold = this.mg
         .config()
         .tradeShipGold(
-          this.mg.manhattanDist(this.srcPort.tile(), this.dstPort.tile()),
+          this.mg.manhattanDist(this.srcPort.tile(), this._dstPort.tile()),
         );
       this.srcPort.owner().addGold(gold);
-      this.dstPort.owner().addGold(gold);
+      this._dstPort.owner().addGold(gold);
       this.mg.displayMessage(
         `Received ${renderNumber(gold)} gold from trade with ${this.srcPort.owner().displayName()}`,
         MessageType.SUCCESS,
-        this.dstPort.owner().id(),
+        this._dstPort.owner().id(),
       );
       this.mg.displayMessage(
-        `Received ${renderNumber(gold)} gold from trade with ${this.dstPort.owner().displayName()}`,
+        `Received ${renderNumber(gold)} gold from trade with ${this._dstPort.owner().displayName()}`,
         MessageType.SUCCESS,
         this.srcPort.owner().id(),
       );
@@ -154,4 +159,8 @@ export class TradeShipExecution implements Execution {
   activeDuringSpawnPhase(): boolean {
     return false;
   }
+
+  dstPort(): TileRef {
+    return this._dstPort.tile();
+  }
 }
diff --git a/src/core/execution/WarshipExecution.ts b/src/core/execution/WarshipExecution.ts
index 59c29b04f..088e96cfb 100644
--- a/src/core/execution/WarshipExecution.ts
+++ b/src/core/execution/WarshipExecution.ts
@@ -78,7 +78,11 @@ export class WarshipExecution implements Execution {
       .filter((u) => u.owner() != this.warship.owner())
       .filter((u) => u != this.warship)
       .filter((u) => !u.owner().isAlliedWith(this.warship.owner()))
-      .filter((u) => !this.alreadySentShell.has(u));
+      .filter((u) => !this.alreadySentShell.has(u))
+      .filter(
+        (u) =>
+          u.type() != UnitType.TradeShip || u.dstPort().owner() != this.owner(),
+      );
 
     this.target =
       ships.sort((a, b) => {
diff --git a/src/core/game/Game.ts b/src/core/game/Game.ts
index e6d0819ce..c61aa153c 100644
--- a/src/core/game/Game.ts
+++ b/src/core/game/Game.ts
@@ -214,6 +214,9 @@ export interface Unit {
 
   // Updates
   toUpdate(): UnitUpdate;
+
+  // Only for some types, otherwise return null
+  dstPort(): Unit;
 }
 
 export interface TerraNullius {
@@ -267,7 +270,12 @@ export interface Player {
   units(...types: UnitType[]): Unit[];
   unitsIncludingConstruction(type: UnitType): Unit[];
   canBuild(type: UnitType, targetTile: TileRef): TileRef | false;
-  buildUnit(type: UnitType, troops: number, tile: TileRef): Unit;
+  buildUnit(
+    type: UnitType,
+    troops: number,
+    tile: TileRef,
+    dstPort?: Unit,
+  ): Unit;
   captureUnit(unit: Unit): void;
 
   // Relations & Diplomacy
@@ -300,10 +308,17 @@ export interface Player {
   outgoingEmojis(): EmojiMessage[];
   sendEmoji(recipient: Player | typeof AllPlayers, emoji: string): void;
 
-  // Trading
+  // Donation
   canDonate(recipient: Player): boolean;
   donate(recipient: Player, troops: number): void;
 
+  // Embargo
+  hasEmbargoAgainst(other: Player): boolean;
+  tradingPartners(): Player[];
+  addEmbargo(other: PlayerID): void;
+  stopEmbargo(other: PlayerID): void;
+  canTrade(other: Player): boolean;
+
   // Attacking.
   canAttack(tile: TileRef): boolean;
   createAttack(
@@ -392,6 +407,7 @@ export interface PlayerInteraction {
   canBreakAlliance: boolean;
   canTarget: boolean;
   canDonate: boolean;
+  canEmbargo: boolean;
 }
 
 export interface EmojiMessage {
diff --git a/src/core/game/GameUpdates.ts b/src/core/game/GameUpdates.ts
index d3896eee0..4cd77f582 100644
--- a/src/core/game/GameUpdates.ts
+++ b/src/core/game/GameUpdates.ts
@@ -95,6 +95,7 @@ export interface PlayerUpdate {
   troops: number;
   targetTroopRatio: number;
   allies: number[];
+  embargoes: Set<PlayerID>;
   isTraitor: boolean;
   targets: number[];
   outgoingEmojis: EmojiMessage[];
diff --git a/src/core/game/GameView.ts b/src/core/game/GameView.ts
index ad1e9622a..b7e24a07d 100644
--- a/src/core/game/GameView.ts
+++ b/src/core/game/GameView.ts
@@ -191,6 +191,10 @@ export class PlayerView {
     return this.data.outgoingAllianceRequests.some((id) => other.id() == id);
   }
 
+  hasEmbargoAgainst(other: PlayerView): boolean {
+    return this.data.embargoes.has(other.id());
+  }
+
   profile(): Promise<PlayerProfile> {
     return this.game.worker.playerProfile(this.smallID());
   }
diff --git a/src/core/game/PlayerImpl.ts b/src/core/game/PlayerImpl.ts
index 0ca8e55ee..d6f3744d7 100644
--- a/src/core/game/PlayerImpl.ts
+++ b/src/core/game/PlayerImpl.ts
@@ -62,6 +62,8 @@ export class PlayerImpl implements Player {
 
   isTraitor_ = false;
 
+  private embargoes: Set<PlayerID> = new Set();
+
   public _borderTiles: Set<TileRef> = new Set();
 
   public _units: UnitImpl[] = [];
@@ -123,6 +125,7 @@ export class PlayerImpl implements Player {
       troops: this.troops(),
       targetTroopRatio: this.targetTroopRatio(),
       allies: this.alliances().map((a) => a.other(this).smallID()),
+      embargoes: this.embargoes,
       isTraitor: this.isTraitor(),
       targets: this.targets().map((p) => p.smallID()),
       outgoingEmojis: this.outgoingEmojis(),
@@ -502,6 +505,28 @@ export class PlayerImpl implements Player {
     );
   }
 
+  hasEmbargoAgainst(other: Player): boolean {
+    return this.embargoes.has(other.id());
+  }
+
+  canTrade(other: Player): boolean {
+    return !other.hasEmbargoAgainst(this) && !this.hasEmbargoAgainst(other);
+  }
+
+  addEmbargo(other: PlayerID): void {
+    this.embargoes.add(other);
+  }
+
+  stopEmbargo(other: PlayerID): void {
+    this.embargoes.delete(other);
+  }
+
+  tradingPartners(): Player[] {
+    return this.mg
+      .players()
+      .filter((other) => other != this && this.canTrade(other));
+  }
+
   gold(): Gold {
     return this._gold;
   }
@@ -588,7 +613,12 @@ export class PlayerImpl implements Player {
     );
   }
 
-  buildUnit(type: UnitType, troops: number, spawnTile: TileRef): UnitImpl {
+  buildUnit(
+    type: UnitType,
+    troops: number,
+    spawnTile: TileRef,
+    dstPort?: Unit,
+  ): UnitImpl {
     const cost = this.mg.unitInfo(type).cost(this);
     const b = new UnitImpl(
       type,
@@ -597,6 +627,7 @@ export class PlayerImpl implements Player {
       troops,
       this.mg.nextUnitID(),
       this,
+      dstPort,
     );
     this._units.push(b);
     this.removeGold(cost);
diff --git a/src/core/game/UnitImpl.ts b/src/core/game/UnitImpl.ts
index a03524f9e..cda62a23f 100644
--- a/src/core/game/UnitImpl.ts
+++ b/src/core/game/UnitImpl.ts
@@ -21,6 +21,7 @@ export class UnitImpl implements Unit {
     private _troops: number,
     private _id: number,
     public _owner: PlayerImpl,
+    private _dstPort?: Unit,
   ) {
     // default to 60% health (or 1.2 is no health specified)
     this._health = (this.mg.unitInfo(_type).maxHealth ?? 2) * 0.6;
@@ -141,4 +142,8 @@ export class UnitImpl implements Unit {
   toString(): string {
     return `Unit:${this._type},owner:${this.owner().name()}`;
   }
+
+  dstPort(): Unit {
+    return this._dstPort;
+  }
 }