The purpose of the Bakkah mission was a journey to Bakkah with the goal of finding a Sith amulet. During the era of the Galactic Civil War, Darth Vader discovered the existence of a long-lost Sith amulet that had been found on the world of Bakkah. In response, Lord Vader dispatched a unit of stormtroopers to retrieve the artifact; however, the Imperial troops were ambushed by the indigenous Sand People of Bakkah, who then claimed the amulet.
Simultaneously, Luke Skywalker and R2-D2 hurried to Bakkah, trying to get the amulet before Vader could acquire it. Luke got to the Sand People's base just as the second group of Imperial forces showed up, with Lord Vader leading them. Luke was able to fend off the stormtroopers and fight Vader to a draw. In the end, he left Bakkah with the Sith amulet.