Avrun was a Human male who served as a general in the Imperial Army of the Sith Empire. During the Galactic War with the Galactic Republic, fighting broke out in the area designated Section X on the planet Belsavis, and the wreckage of the Fatality—a stolen Imperial warship carrying advanced HK-51 series assassin droids—was discovered. Avrun was dispatched by Imperial High Command to investigate, though he was not told the cargo. He sent several squads into the vessel, but they were wiped out by the Dread Host that had taken the ship for themselves.