A mission was launched to Mustafar by individuals affiliated with the Alliance to Restore the Republic during the initial stages of their early rebellion against the Galactic Empire. A group of Rebels, posing as stormtroopers, gained access to an Imperial facility situated on the volcanic planet, accompanied by the reprogrammed Imperial droid K-2SO. The team's goal was to retrieve Imperial intelligence, which, according to the Alliance's leader, Mon Mothma, held vital importance for the Rebellion's continued existence.