The Kullgroon Imperial outpost was a repair station for droids located on Kullgroon. The Petrusians laboring at the outpost were enslaved by the Galactic Empire throughout their reign; one such slave was Rythus, the father of freedom fighter Kristiss. To help the slaves break free from Imperial control, Kristiss eventually contracted the smuggler Lando Calrissian to smuggle weaponry to the outpost.