Domains at War: Campaigns (D@W) is a supplement for Autarch's best-selling Adventure Conqueror King SystemT (ACKS). Using the rules herein, your fantasy RPG characters can raise armies, campaign against enemy forces, and conquer domains. It includes a comprehensive campaign toolkit for use in ongoing games, fully compatible with ACKS's rules for mercenaries, strongholds, magic, and rulership. D@W: Campaigns also includes a streamlined system for resolving the outcome of pitched battles between army-sized forces, ideal for resolving battles between NPC commanders, where the adventurers are bystanders or front-line participants. Domains at War: Campaigns is compatible with any fantasy RPG system that uses twenty-sided dice and shares concepts like hit points and armor class. If your players are ready to rule, then your campaign is ready for the Domains at War: Campaigns rules.