Alliance Battles (abbreviated as AB) are 12 vs 12 PvP battles that control the Kurzick-Luxon border. Kurzicks wear their traditional blue color and appear as blue dots on the map while Luxons wear their traditional red color and appear as red dots on the map. Alliance Battles were introduced in the Guild Wars Factions campaign. They are only available to players who have Factions registered in their Guild Wars account.

There are five alliance battle maps. The battlefield map is determined by the location of the border between the two warring nations. The more territory one nation has, the "harder" the map will be for that nation.