Fiefs et Empires is an expansion for Ave Tenebrae, a French fantasy wargame. It adds new units and scenarios to the base game, as well as modular maps. The rule book contains rules for creating and managing a "fief" (dominion), which can be used standalone but are meant to be used as a roleplaying aid for fantasy roleplaying campaigns. The rules can be used with any RPG but are written with Dungeons and Dragons in mind.