Orion Battlegroup constituted an Imperial battle group operating under the command of Task Force Vengeance. The Star Destroyers designated Nemesis and Conqueror were integral components of this formation.
During a skirmish near Almaran, Admiral Senn issued directives for Battlegroup Orion to engage in the chase of the Calamari cruiser known as Liberty, in conjunction with the Interdictor named Compellor. Ultimately, both Star Destroyers met their destruction as a result of an ambush orchestrated by the Alliance within the Goff system.