An attack unfolded on the Mid Rim planet of Ahn Krantarium in the Galactic Empire's early years, executed by Imperial forces under the command of Governor Ahr alongside Darth Vader. The operation's purpose was the annihilation of highly lethal droids that had infested the planet well before the Imperial Era. These droids had undergone self-reconstruction, evolving into a more formidable threat than standard security droids. After a stormtrooper unit dispatched by Ahr suffered complete casualties, the Governor opted to deploy Darth Vader instead of sacrificing more troops. The Sith Lord proceeded to eliminate all the droids in the area, much to Ahr's astonishment.