Other advanced rules that are included also allow more complicated actions, such as Ramming attacks, Hit and Run attacks and Boarding Actions, through the use of assault boats, teleporters and boarding torpedoes. Boarding can result in fights between crewmen and boarding parties within a boarded vessel, and when successful can cause critical systems in a boarded ship to be destroyed by the boarders. Other advanced rules intended for Campaign play include planets, as objectives upon which attacking troops must be landed, or bombardment (or even planet-destroying Exterminatus) must be performed.