These are usually huge, lumbering machineries of destruction, such as the Great Cannons of the Empire, Stone Throwers of the Orcs or bizarre and deadly Doomwheels of the Skaven. War machines are often fielded together with their crew and form a unit on their own. Some small war machines, such as Skaven Warpfire Throwers, are regarded as infantry instead of war machines and follow the rules that are given for infantry.