From the back of the book:
Tomorrow you will bring the battle to the foe. Tonight you walk among the troops you’ll lead. The mercenaries are veterans and sleep while they can, but the peasants levied from your lands seek courage in tales of your previous victories. In the cover of darkness, you can listen rather than lead. Remember when you were like them? Back when you first entered the dungeon, you wielded a sword to fight for gold, glory, and the favor of the gods. Winning these earned you a throne. Now you wield an army, and fight for the right to rule the domains at war.
Domains at War brings the full sweep of fantasy warfare to tabletop gaming and role-playing campaigns. The Domains at War Complete Set offers three interlocking systems to cover the full sweep of military struggles in a fantasy, ancient, or medieval world:
• A quick mass combat rule system for use in any role-playing game that uses concepts like hit points and armor class
• A comprehensive campaign toolkit for use in ongoing games, fully compatible with the Adventurer Conqueror King System's rules for mercenaries, strongholds, magic, and rulership
• A fast-playing tactical wargame derived from these systems, so that playing a battle generates outcomes like what you'd get if you fought it out on the one-on-one roleplaying scale