Is Battlefield is a 3D location (level) where Player deploys his army battles units to battle AI army units during Campaign mission. Each mission may have several type types of goals. The most common goal in Dark Omen missions is to completely destroy or route enemy forces.
Almost each battlefield has different stationary objects (or furns) such as houses, big trees, walls, etc. as well ass different terrain types
References:
Link to Battlefield (entity) descriptiondescription