This battlecruiser first saw combat in the Siege of the Maw Installation, where Darth Nihilus besieged the invaluable Galactic Federation research compound with six Imperial I-class Star Destroyers and two Immobilizer 418-class heavy cruisers. The Exenterator entered the system, along with two Aggressor-class destroyers and the TIE Defenders of the elite 902nd starfighter wing.