diff --git a/src/entities/behaviours/Alliance.gd b/src/entities/behaviours/Alliance.gd
index b8c5c28..7f677a6 100644
--- a/src/entities/behaviours/Alliance.gd
+++ b/src/entities/behaviours/Alliance.gd
@@ -1,10 +1,23 @@
 extends Node
+class_name Alliance
 
 
-enum Alliance {
+enum AllianceKind {
 	ENEMY = -1,
 	NONE = 0,
 	PLAYER = 1,
 }
 
-export(Alliance) var alliance: int
+export(AllianceKind) var alliance: int
+
+
+static func get_value(first) -> int:
+	var first_node = first.get_node("Alliance")
+	var first_alliance = null
+	if first_node != null:
+		first_alliance = first_node.alliance
+	return first_alliance
+
+
+static func compare(first, second) -> bool:
+	return get_value(first) == get_value(second)