The Bellicose, an Imperial I-class Star Destroyer under the command of Captain [Aban], joined the fleet of Grand Admiral Thrawn during his campaign against the New Republic in 9 ABY. At the time of an operation in the Taanab system, it became the flagship, during which the Dark Jedi Joruus C'baoth commandeered the Bellicose's gunnery controls, acting against Aban's direct instructions. Subsequently, as part of Thrawn's scheme to capture the Ukio system, the vessel took part in an assault against the New Republic base on Ord Pardron. The final recorded engagement of the Bellicose was during the Battle of Bilbringi.
In a training mission within the Star Wars: X-Wing vs. TIE Fighter game, a scenario unfolds where the Calamari Cruiser Liberty is ensnared by the Interdictor Restrainer and then comes under fire from the ISD Bellicose and the VSD Jundland. To facilitate the Liberty's escape, Rebel fighters are tasked with destroying the Restrainer. The question remains unanswered as to whether this fictionalized event mirrors an actual historical encounter between these specific forces, and if so, the timeline and location of such a battle.