The Fourth Battleship Division is a unit within the Lost Fleet. As of the flight from the Syndic home system, the Division consisted of the battleships Warrior, Triumph, Vengeance, and Revenge. Warrior and Triumph took part in Captain Falco's mutiny, which resulted in Triumph being lost and Warrior being severely damaged at the Battle of Vidha. Warrior was later lost at the Second Battle of the Lakota system, leaving the Fourth Division with just two ships.