Courageous was a member of the Imperial-class Star Destroyer family, serving within the Imperial Navy.
Courageous was a key participant in the initial pair of operations conducted by Grand Admiral Thrawn's task force, which was dedicated to tracking down the treacherous Grand Admiral Demetrius Zaarin. Specifically, in the Semag system, Courageous and its complement of forces took credit for neutralizing and seizing a convoy sympathetic to Zaarin, in addition to obliterating its protective ships, Strident and Rahmat.
The ship was also deployed to the Gwar system to launch a preemptive strike aimed at a rogue fleet component and a supply installation. Thrawn did not authorize this mission. During this assault, Zaarin's military force, which incorporated vessels like the Star Destroyer Imperator, eliminated Courageous. Regardless, the Courageous' starfighter contingent, under the command of Maarek Stele, managed to wipe out the XQ6 Platform, Immobilizer 418 cruiser Bomb and Kuma squadron.