The attack on Cymoon 1 took place during the Galactic Civil War, and shortly after the Battle of Yavin when the Rebel Alliance carried out an attack on the Imperial Weapons Factory Alpha on Cymoon 1. The assault began as an infiltration, with Han Solo posing as an emissary for Jabba the Hutt in a weapons deal with the Empire; Luke Skywalker and Leia Organa posed as his bodyguards. Once inside the factory, the Rebels revealed themselves, attacked the Imperials, freed a number of slaves, and set the facility's power core to overload. Their plans changed, however, when Darth Vader arrived at the factory and ordered the facility into full alert. The Rebels hijacked an AT-AT to use in their escape, while Skywalker briefly confronted the Dark Lord of the Sith in lightsaber combat before the walk