The Fourth Battle Cruiser Division is a unit within the Lost Fleet. At the time of the flight from the Syndic home system, the Fourth Battle Cruiser Division consisted of the battle cruisers Dauntless (the fleet flagship), Daring, Terrible, and Victorious, commanded by Captain Tanya Desjani of the Dauntless.

The Terrible was lost with all hands at the Battle of Ilion, but the Fourth Division was brought back up to full strength at Varandal with the addition of the battle cruiser Intemperate, which had just been transferred to newly made Admiral Geary's command.