Index: ps/trunk/binaries/data/mods/public/gui/session/ResearchProgress.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/session/ResearchProgress.js
+++ ps/trunk/binaries/data/mods/public/gui/session/ResearchProgress.js
@@ -55,6 +55,7 @@
 		this.sprite = Engine.GetGUIObjectByName("researchStartedIcon[" + i + "]");
 		this.progress = Engine.GetGUIObjectByName("researchStartedProgressSlider[" + i + "]");
 		this.timeRemaining = Engine.GetGUIObjectByName("researchStartedTimeRemaining[" + i + "]");
+		this.paused = Engine.GetGUIObjectByName("researchPausedIcon[" + i + "]");
 
 		this.buttonHeight = this.button.size.bottom - this.button.size.top;
 		this.buttonTop = this.Margin + (this.Margin + this.buttonHeight) * i;
@@ -68,13 +69,18 @@
 		this.researcher = researchStatus.researcher;
 
 		let template = GetTechnologyData(techName, g_Players[g_ViewedPlayer].civ);
-		this.sprite.sprite = "stretched:" + this.PortraitDirectory + template.icon;
+		let modifier = "stretched:";
+		if (researchStatus.paused)
+			modifier += "color:0 0 0 127:grayscale:";
+		this.sprite.sprite = modifier + this.PortraitDirectory + template.icon;
 
 		let size = this.button.size;
 		size.top = offset + this.buttonTop;
 		size.bottom = size.top + this.buttonHeight;
 		this.button.size = size;
 		this.button.tooltip = getEntityNames(template);
+		if (researchStatus.paused)
+			this.button.tooltip += "\n" + translate(this.PausedResearchString);
 		this.button.hidden = false;
 
 		size = this.progress.size;
@@ -85,6 +91,8 @@
 			Engine.FormatMillisecondsIntoDateStringGMT(
 				researchStatus.timeRemaining,
 				translateWithContext("countdown format", this.CountdownFormat));
+
+		this.paused.hidden = !researchStatus.paused;
 	}
 
 	onPress()
@@ -107,3 +115,6 @@
  * This format is used when displaying the remaining time of the currently viewed techs in research.
  */
 ResearchProgressButton.prototype.CountdownFormat = markForTranslationWithContext("countdown format", "m:ss");
+
+// Translation: String displayed when the research is paused. E.g. by being garrisoned or when not the first item in the queue.
+ResearchProgressButton.prototype.PausedResearchString = markForTranslation("(This item is paused.)");
Index: ps/trunk/binaries/data/mods/public/gui/session/ResearchProgress.xml
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/session/ResearchProgress.xml
+++ ps/trunk/binaries/data/mods/public/gui/session/ResearchProgress.xml
@@ -7,6 +7,7 @@
 			<object name="researchStartedIcon[n]" ghost="true" type="image" size="3 3 35 35"/>
 			<object name="researchStartedProgressSlider[n]" type="image" sprite="queueProgressSlider" ghost="true" size="3 3 37 37"/>
 			<object name="researchStartedTimeRemaining[n]" ghost="true" style="iconButtonProgress" type="text"/>
+			<object name="researchPausedIcon[n]" ghost="true" type="image" sprite="stretched:session/icons/stop.png" size="3 3 35 35"/>
 		</object>
 	</repeat>
 </object>
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
@@ -1521,7 +1521,8 @@
 			"type": "train",
 			"template": trainEntType,
 			"count": 1,
-			"entities": buildingsForTraining
+			"entities": buildingsForTraining,
+			"pushFront": Engine.HotkeyIsPressed("session.pushorderfront")
 		});
 	}
 }
@@ -1579,7 +1580,8 @@
 			"type": "train",
 			"entities": appropriateBuildings.slice(0, buildingsCountToTrainFullBatch),
 			"template": g_BatchTrainingType,
-			"count": batchedSize
+			"count": batchedSize,
+			"pushFront": Engine.HotkeyIsPressed("session.pushorderfront")
 		});
 
 		// Train remainer in one more structure.
@@ -1589,7 +1591,8 @@
 				"type": "train",
 				"entities": [appropriateBuildings[buildingsCountToTrainFullBatch]],
 				"template": g_BatchTrainingType,
-				"count": remainer
+				"count": remainer,
+				"pushFront": Engine.HotkeyIsPressed("session.pushorderfront")
 			});
 	}
 	else
@@ -1597,7 +1600,8 @@
 			"type": "train",
 			"entities": appropriateBuildings,
 			"template": g_BatchTrainingType,
-			"count": batchedSize
+			"count": batchedSize,
+			"pushFront": Engine.HotkeyIsPressed("session.pushorderfront")
 		});
 }
 
Index: ps/trunk/binaries/data/mods/public/gui/session/selection_panels.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/session/selection_panels.js
+++ ps/trunk/binaries/data/mods/public/gui/session/selection_panels.js
@@ -590,10 +590,22 @@
 			guiObject.size = size;
 
 			data.button.enabled = controlsPlayer(data.player);
+
+			Engine.GetGUIObjectByName("unitQueuePausedIcon[" + data.i + "]").hidden = !queuedItem.paused;
+			if (queuedItem.paused)
+				// Translation: String displayed when the research is paused. E.g. by being garrisoned or when not the first item in the queue.
+				data.button.tooltip += "\n" + translate("(This item is paused.)");
 		}
 
 		if (template.icon)
-			data.icon.sprite = (data.item.ghost ? "grayscale:" : "") + "stretched:session/portraits/" + template.icon;
+		{
+			let modifier = "stretched:";
+			if (queuedItem.paused)
+				modifier += "color:0 0 0 127:grayscale:";
+			else if (data.item.ghost)
+				modifier += "grayscale:";
+			data.icon.sprite = modifier + "session/portraits/" + template.icon;
+		}
 
 
 		const showTemplateFunc = () => { showTemplateDetails(data.item.queuedItem.unitTemplate || data.item.queuedItem.technologyTemplate, data.playerState.civ); };
Index: ps/trunk/binaries/data/mods/public/gui/session/selection_panels_helpers.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/session/selection_panels_helpers.js
+++ ps/trunk/binaries/data/mods/public/gui/session/selection_panels_helpers.js
@@ -272,7 +272,8 @@
 	Engine.PostNetworkCommand({
 		"type": "research",
 		"entity": entity,
-		"template": researchType
+		"template": researchType,
+		"pushFront": Engine.HotkeyIsPressed("session.pushorderfront")
 	});
 }
 
Index: ps/trunk/binaries/data/mods/public/gui/session/selection_panels_right/queue_panel.xml
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/session/selection_panels_right/queue_panel.xml
+++ ps/trunk/binaries/data/mods/public/gui/session/selection_panels_right/queue_panel.xml
@@ -12,8 +12,9 @@
 		<repeat count="16">
 			<object name="unitQueueButton[n]" hidden="true" style="iconButton" type="button" size="2 2 40 40" tooltip_style="sessionToolTipBottom">
 				<object name="unitQueueIcon[n]" ghost="true" type="image" size="3 3 35 35"/>
-				<object name="unitQueueProgressSlider[n]" type="image" sprite="queueProgressSlider" ghost="true" size="3 3 35 35" z="20"/>
+				<object name="unitQueueProgressSlider[n]" type="image" sprite="queueProgressSlider" ghost="true" size="3 3 35 35"/>
 				<object name="unitQueueCount[n]" ghost="true" style="groupIconsText" type="text" z="20"/>
+				<object name="unitQueuePausedIcon[n]" ghost="true" type="image" sprite="stretched:session/icons/stop.png" size="3 3 35 35"/>
 			</object>
 		</repeat>
 	</object>
Index: ps/trunk/binaries/data/mods/public/simulation/ai/common-api/entity.js
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/ai/common-api/entity.js
+++ ps/trunk/binaries/data/mods/public/simulation/ai/common-api/entity.js
@@ -940,7 +940,7 @@
 		return this;
 	},
 
-	"train": function(civ, type, count, metadata, promotedTypes)
+	"train": function(civ, type, count, metadata, promotedTypes, pushFront = false)
 	{
 		let trainable = this.trainableEntities(civ);
 		if (!trainable)
@@ -960,7 +960,8 @@
 			"template": type,
 			"count": count,
 			"metadata": metadata,
-			"promoted": promotedTypes
+			"promoted": promotedTypes,
+			"pushFront": pushFront
 		});
 		return this;
 	},
@@ -985,8 +986,13 @@
 		return this;
 	},
 
-	"research": function(template) {
-		Engine.PostCommand(PlayerID, { "type": "research", "entity": this.id(), "template": template });
+	"research": function(template, pushFront = false) {
+		Engine.PostCommand(PlayerID, {
+			"type": "research",
+			"entity": this.id(),
+			"template": template,
+			"pushFront": pushFront
+		});
 		return this;
 	},
 
Index: ps/trunk/binaries/data/mods/public/simulation/components/GuiInterface.js
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/components/GuiInterface.js
+++ ps/trunk/binaries/data/mods/public/simulation/components/GuiInterface.js
@@ -692,13 +692,16 @@
 		let cmpProductionQueue = Engine.QueryInterface(ret[tech].researcher, IID_ProductionQueue);
 		if (cmpProductionQueue)
 		{
-			ret[tech].progress = cmpProductionQueue.GetQueue()[0].progress;
-			ret[tech].timeRemaining = cmpProductionQueue.GetQueue()[0].timeRemaining;
+			const research = cmpProductionQueue.GetQueue().find(item => item.technologyTemplate === tech);
+			ret[tech].progress = research.progress;
+			ret[tech].timeRemaining = research.timeRemaining;
+			ret[tech].paused = research.paused;
 		}
 		else
 		{
 			ret[tech].progress = 0;
 			ret[tech].timeRemaining = 0;
+			ret[tech].paused = true;
 		}
 	}
 	return ret;
Index: ps/trunk/binaries/data/mods/public/simulation/components/ProductionQueue.js
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/components/ProductionQueue.js
+++ ps/trunk/binaries/data/mods/public/simulation/components/ProductionQueue.js
@@ -47,6 +47,7 @@
 			"productionStarted": false, // true iff production has started (we have reserved population).
 			"timeTotal": 15000, // msecs
 			"timeRemaining": 10000, // msecs
+			"paused": false, // Whether the item is currently paused (e.g. not the first item or parent is garrisoned).
 			"resources": { "wood": 100, ... }, // Total resources of the item when queued.
 			"entity": {
 				"template": "units/example",
@@ -340,10 +341,11 @@
  * @param {string} type - The type of production (i.e. "unit" or "technology").
  * @param {number} count - The amount of units to be produced. Ignored for a tech.
  * @param {any} metadata - Optionally any metadata to be attached to the item.
+ * @param {boolean} pushFront - Whether to push the item to the front of the queue and pause any item(s) currently in progress.
  *
  * @return {boolean} - Whether the addition of the item has succeeded.
  */
-ProductionQueue.prototype.AddItem = function(templateName, type, count, metadata)
+ProductionQueue.prototype.AddItem = function(templateName, type, count, metadata, pushFront = false)
 {
 	// TODO: there should be a way for the GUI to determine whether it's going
 	// to be possible to add a batch (based on resource costs and length limits).
@@ -382,6 +384,7 @@
 		"metadata": metadata,
 		"productionStarted": false,
 		"resources": {}, // The total resource costs.
+		"paused": false
 	};
 
 	// ToDo: Still some duplication here, some can might be combined,
@@ -490,7 +493,14 @@
 		return false;
 
 	item.id = this.nextID++;
-	this.queue.push(item);
+	if (pushFront)
+	{
+		if (this.queue[0])
+			this.queue[0].paused = true;
+		this.queue.unshift(item);
+	}
+	else
+		this.queue.push(item);
 
 	const cmpTrigger = Engine.QueryInterface(SYSTEM_ENTITY, IID_Trigger);
 	if (item.entity)
@@ -618,6 +628,7 @@
 		"neededSlots": item.entity?.neededSlots,
 		"progress": 1 - (item.timeRemaining / (item.timeTotal || 1)),
 		"timeRemaining": item.timeRemaining,
+		"paused": item.paused,
 		"metadata": item.metadata
 	}));
 };
@@ -797,6 +808,8 @@
 	while (this.queue.length)
 	{
 		let item = this.queue[0];
+		if (item.paused)
+			item.paused = false;
 		if (!item.productionStarted)
 		{
 			if (item.entity)
@@ -924,10 +937,14 @@
 {
 	this.StopTimer();
 	this.paused = true;
+	if (this.queue[0])
+		this.queue[0].paused = true;
 };
 
 ProductionQueue.prototype.UnpauseProduction = function()
 {
+	if (this.queue[0])
+		this.queue[0].paused = false;
 	delete this.paused;
 	this.StartTimer();
 };
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
@@ -372,10 +372,7 @@
 				}
 			}
 			if (queue && queue.GetEntitiesList().indexOf(cmd.template) != -1)
-				if ("metadata" in cmd)
-					queue.AddItem(cmd.template, "unit", +cmd.count, cmd.metadata);
-				else
-					queue.AddItem(cmd.template, "unit", +cmd.count);
+				queue.AddItem(cmd.template, "unit", +cmd.count, cmd.metadata, cmd.pushFront);
 		}
 	},
 
@@ -391,7 +388,7 @@
 
 		var queue = Engine.QueryInterface(cmd.entity, IID_ProductionQueue);
 		if (queue)
-			queue.AddItem(cmd.template, "technology");
+			queue.AddItem(cmd.template, "technology", undefined, cmd.metadata, cmd.pushFront);
 	},
 
 	"stop-production": function(player, cmd, data)