Index: ps/trunk/binaries/data/config/default.cfg
===================================================================
--- ps/trunk/binaries/data/config/default.cfg
+++ ps/trunk/binaries/data/config/default.cfg
@@ -353,6 +353,7 @@
 toggledefaultformation = ""  ; Switch between null default formation and the last default formation used (defaults to "box")
 flare = K                    ; Modifier to send a flare to your allies
 flareactivate = ""           ; Modifier to activate the mode to send a flare to your allies
+calltoarms = ""              ; Modifier to call the selected units to the arms.
 ; Overlays
 showstatusbars = Tab         ; Toggle display of status bars
 devcommands.toggle = "Alt+D" ; Toggle developer commands panel
Index: ps/trunk/binaries/data/mods/public/gui/hotkeys/spec/ingame.json
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/hotkeys/spec/ingame.json
+++ ps/trunk/binaries/data/mods/public/gui/hotkeys/spec/ingame.json
@@ -174,6 +174,10 @@
 			"session.flareactivate": {
 				"name": "Flare (toggle)",
 				"desc": "Set the cursor to Flare. The hotkey can be released."
+			},
+			"session.calltoarms": {
+				"name": "Call to arms",
+				"desc": "Send the selected units on attack move to the specified location after dropping resources."
 			}
 		}
 	}
Index: ps/trunk/binaries/data/mods/public/gui/session/input.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/session/input.js
+++ ps/trunk/binaries/data/mods/public/gui/session/input.js
@@ -18,6 +18,7 @@
 const ACTION_GUARD = 3;
 const ACTION_PATROL = 4;
 const ACTION_OCCUPY_TURRET = 5;
+const ACTION_CALLTOARMS = 6;
 var preSelectedAction = ACTION_NONE;
 
 const INPUT_NORMAL = 0;
Index: ps/trunk/binaries/data/mods/public/gui/session/unit_actions.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/session/unit_actions.js
+++ ps/trunk/binaries/data/mods/public/gui/session/unit_actions.js
@@ -246,6 +246,48 @@
 		"specificness": 10,
 	},
 
+	"call-to-arms": {
+		"execute": function(target, action, selection, queued, pushFront)
+		{
+			let targetClasses;
+			if (Engine.HotkeyIsPressed("session.attackmoveUnit"))
+				targetClasses = { "attack": ["Unit"] };
+			else
+				targetClasses = { "attack": ["Unit", "Structure"] };
+			Engine.PostNetworkCommand({
+				"type": "call-to-arms",
+				"entities": selection,
+				"target": target,
+				"targetClasses": targetClasses,
+				"queued": queued,
+				"pushFront": pushFront,
+				"allowCapture": true,
+				"formation": g_AutoFormation.getNull()
+			});
+			return true;
+		},
+		"getActionInfo": function(entState, targetState)
+		{
+			return { "possible": !!entState.unitAI };
+		},
+		"actionCheck": function(target, selection)
+		{
+			const actionInfo = getActionInfo("call-to-arms", target, selection);
+			return actionInfo.possible && {
+				"type": "call-to-arms",
+				"cursor": "action-attack",
+				"target": target,
+				"firstAbleEntity": actionInfo.entity
+			};
+		},
+		"preSelectedActionCheck": function(target, selection)
+		{
+			return preSelectedAction == ACTION_CALLTOARMS &&
+				this.actionCheck(target, selection);
+		},
+		"specificness": 50,
+	},
+
 	"patrol":
 	{
 		"execute": function(target, action, selection, queued, pushFront)
@@ -1423,6 +1465,27 @@
 		"allowedPlayers": ["Player"]
 	},
 
+	"call-to-arms": {
+		"getInfo": function(entStates)
+		{
+			const classes = ["Soldier", "Warship", "Siege", "Healer"];
+			if (entStates.every(entState => !MatchesClassList(entState.identity.classes, classes)))
+				return false;
+			return {
+				"tooltip": colorizeHotkey("%(hotkey)s" + " ", "session.calltoarms") +
+						translate("Send the selected units on attack move to the specified location after dropping resources."),
+				"icon": "call-to-arms.png",
+				"enabled": true
+			};
+		},
+		"execute": function(entStates)
+		{
+			inputState = INPUT_PRESELECTEDACTION;
+			preSelectedAction = ACTION_CALLTOARMS;
+		},
+		"allowedPlayers": ["Player"]
+	},
+
 	"garrison": {
 		"getInfo": function(entStates)
 		{
Index: ps/trunk/binaries/data/mods/public/simulation/components/UnitAI.js
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/components/UnitAI.js
+++ ps/trunk/binaries/data/mods/public/simulation/components/UnitAI.js
@@ -556,6 +556,17 @@
 		return ACCEPT_ORDER;
 	},
 
+	"Order.DropAtNearestDropSite": function(msg) {
+		const cmpResourceGatherer = Engine.QueryInterface(this.entity, IID_ResourceGatherer);
+		if (!cmpResourceGatherer)
+			return this.FinishOrder();
+		const nearby = this.FindNearestDropsite(cmpResourceGatherer.GetMainCarryingType());
+		if (!nearby)
+			return this.FinishOrder();
+		this.ReturnResource(nearby, false, true);
+		return ACCEPT_ORDER;
+	},
+
 	"Order.ReturnResource": function(msg) {
 		if (this.CheckTargetRange(msg.data.target, IID_ResourceGatherer))
 			this.SetNextState("INDIVIDUAL.RETURNRESOURCE.DROPPINGRESOURCES");
@@ -960,6 +971,13 @@
 			return ACCEPT_ORDER;
 		},
 
+		"Order.DropAtNearestDropSite": function(msg) {
+			this.CallMemberFunction("DropAtNearestDropSite", [false, false]);
+
+			this.SetNextState("MEMBER");
+			return ACCEPT_ORDER;
+		},
+
 		"IDLE": {
 			"enter": function(msg) {
 				// Turn rearrange off. Otherwise, if the formation is idle
@@ -5233,6 +5251,9 @@
 		case "Stop":
 			return [];
 
+		case "DropAtNearestDropSite":
+			break;
+
 		default:
 			error("GetTargetPositions: Unrecognised order type '"+order.type+"'");
 			return [];
@@ -5409,6 +5430,15 @@
 };
 
 /**
+ * The unit will drop all resources at the closest dropsite. If this unit is no gatherer or
+ * no dropsite is available, it will do nothing.
+ */
+UnitAI.prototype.DropAtNearestDropSite = function(queued, pushFront)
+{
+	this.AddOrder("DropAtNearestDropSite", { "force": true }, queued, pushFront);
+};
+
+/**
  * Adds walk-to-target order to queue, this only occurs in response
  * to a player order, and so is forced.
  */
Index: ps/trunk/binaries/data/mods/public/simulation/helpers/Commands.js
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/helpers/Commands.js
+++ ps/trunk/binaries/data/mods/public/simulation/helpers/Commands.js
@@ -279,6 +279,27 @@
 		}
 	},
 
+	"call-to-arms": function(player, cmd, data)
+	{
+		const unitsToMove = data.entities.filter(ent =>
+			MatchesClassList(Engine.QueryInterface(ent, IID_Identity).GetClassesList(),
+				["Soldier", "Warship", "Siege", "Healer"])
+		);
+		GetFormationUnitAIs(unitsToMove, player, cmd, data.formation).forEach(cmpUnitAI => {
+			const target = cmd.target;
+			if (cmd.pushFront)
+			{
+				cmpUnitAI.WalkAndFight(target.x, target.z, cmd.targetClasses, cmd.allowCapture, false, cmd.pushFront);
+				cmpUnitAI.DropAtNearestDropSite(false, cmd.pushFront);
+			}
+			else
+			{
+				cmpUnitAI.DropAtNearestDropSite(cmd.queued, false)
+				cmpUnitAI.WalkAndFight(target.x, target.z, cmd.targetClasses, cmd.allowCapture, true, false);
+			}
+		});
+	},
+
 	"remove-guard": function(player, cmd, data)
 	{
 		for (let ent of data.entities)