Around 2 BBY, which occurred within the Imperial Era, the Galactic Empire initiated a pacification operation. This operation took place in a sector situated within the Mid Rim Territories and was overseen by Moff Ahr. As part of this operation, the Sith Lord known as Darth Vader was assigned to Ahr's command. This assignment came directly from the Galactic Emperor Sheev Palpatine, who intended it as a learning experience for Vader. Instructed to strictly adhere to Ahr's directives, Vader complied, finding himself repeatedly in scenarios that Ahr anticipated would lead to the death of the Sith. In the end, Vader orchestrated Ahr's demise. This occurred when the Moff ventured into the prohibited Kankalo Belt Containment Zone and instructed him to eliminate the most significant threat he could identify. Vader concluded that Ahr himself constituted that threat and ensured the Moff was eliminated by one of the creatures residing in the zone.