A mining facility was built on Mustafar, a volcanic planet. Towards the end of the Clone Wars, it served as the headquarters of the Separatist Council. The Council members were slain there at the hand of Darth Vader. The mining facility was also the location of the violent duel between Darth Vader and Obi-Wan Kenobi, in which, Darth Vader was severely injured.
- Star Wars: Episode III Revenge of the Sith (First appearance)