diff --git a/src/game/engine/scenes/world_map/world_map_combat.gd b/src/game/engine/scenes/world_map/world_map_combat.gd
index 328dfb07..27233c2f 100644
--- a/src/game/engine/scenes/world_map/world_map_combat.gd
+++ b/src/game/engine/scenes/world_map/world_map_combat.gd
@@ -13,13 +13,20 @@ const CombatResultScene: PackedScene = preload(
 const PromotionPickerScene: PackedScene = preload(
 	"res://engine/scenes/combat/promotion_picker.tscn"
 )
+const LairModePickerScene: PackedScene = preload(
+	"res://engine/scenes/combat/lair_mode_picker.tscn"
+)
 
 var _combat_preview: CanvasLayer = null
 var _combat_result: CanvasLayer = null
 var _promotion_picker: CanvasLayer = null
+var _lair_mode_picker: CanvasLayer = null
 var _pending_attacker: RefCounted = null
 var _pending_defender: RefCounted = null
 
+## Lair engagement awaiting a mode choice from the picker.
+var _pending_lair: Dictionary = {}
+
 
 func setup(parent: Node) -> void:
 	_combat_preview = CombatPreviewScene.instantiate()
@@ -31,11 +38,16 @@ func setup(parent: Node) -> void:
 	_promotion_picker = PromotionPickerScene.instantiate()
 	parent.add_child(_promotion_picker)
 
+	_lair_mode_picker = LairModePickerScene.instantiate()
+	parent.add_child(_lair_mode_picker)
+
 	EventBus.combat_resolved.connect(_on_combat_resolved)
 	_combat_result.result_dismissed.connect(_on_result_dismissed)
 	_combat_result.promotion_requested.connect(_on_promotion_requested)
 	_promotion_picker.promotion_chosen.connect(_on_promotion_chosen)
 	_promotion_picker.promotion_cancelled.connect(_on_promotion_cancelled)
+	_lair_mode_picker.mode_chosen.connect(_on_lair_mode_chosen)
+	_lair_mode_picker.cancelled.connect(_on_lair_mode_cancelled)
 
 
 func get_lair_at(axial: Vector2i) -> Dictionary:
@@ -99,14 +111,59 @@ func initiate_lair_combat(
 	lair_diet: String,
 	lair_name: String,
 ) -> void:
-	## Show combat preview for attacker vs a lair creature at lair_pos.
-	## Uses GdCombatResolver.wild_stats() for the defender.
+	## Open the Assault / Raid / Siege mode picker for a lair engagement (p3-10a).
+	## The chosen mode routes through _on_lair_mode_chosen; Assault proceeds to
+	## the p0-17 lair-clear flow (the existing assault path). Raid/Siege are shown
+	## disabled by the picker until p3-10c/p3-10b land their dispatcher branches.
+	_pending_lair = {
+		"attacker": attacker,
+		"pos": lair_pos,
+		"tier": lair_tier,
+		"size": lair_size,
+		"diet": lair_diet,
+		"name": lair_name,
+	}
+	if _lair_mode_picker == null:
+		## No picker wired (e.g. headless unit context) — fall back to direct
+		## assault so the p0-17 clear path is never regressed.
+		_begin_lair_assault(_pending_lair)
+		_pending_lair = {}
+		return
+	_lair_mode_picker.show_picker(lair_name)
+
+
+func _on_lair_mode_chosen(mode: String) -> void:
+	var lair: Dictionary = _pending_lair
+	_pending_lair = {}
+	if lair.is_empty():
+		return
+	## Only Assault is wired in Game-1 (Raid/Siege are disabled in the picker).
+	if mode == _lair_mode_picker.MODE_ASSAULT:
+		_begin_lair_assault(lair)
+
+
+func _on_lair_mode_cancelled() -> void:
+	## Player backed out of the engagement; the stack stays where it is.
+	_pending_lair = {}
+
+
+func _begin_lair_assault(lair: Dictionary) -> void:
+	## Show the combat preview for the attacker vs the lair creature.
+	## Uses GdCombatResolver.wild_stats() for the defender (inside the preview).
+	var attacker: RefCounted = lair.get("attacker")
+	if attacker == null:
+		return
 	_pending_attacker = attacker
 	_pending_defender = null
 	var game_map: RefCounted = GameState.get_game_map()
 	var all_units: Array = _collect_all_units()
 	_combat_preview.show_lair_preview(
-		attacker, lair_pos, lair_tier, lair_size, lair_diet, lair_name,
+		attacker,
+		lair.get("pos", Vector2i.ZERO),
+		int(lair.get("tier", 4)),
+		str(lair.get("size", "medium")),
+		str(lair.get("diet", "carnivore")),
+		str(lair.get("name", "Lair Creature")),
 		game_map, all_units
 	)