The Extermination of the Jedi Order--referred to in-universe as Order 66, Operation: Knightfall and The Great Jedi Purge--is a fictional historical event in the Star Wars space opera series created by George Lucas. It is a major plot element in the 2005 film Star Wars Episode III: Revenge of the Sith, and is referenced in the Star Wars expanded universe. In the film, the Jedi are systematically eliminated by the Clone Army, on the order of the Sith Lord Darth Sidious. Obi-Wan Kenobi and Yoda are among a handful of known surviving Jedi. The first person to be issued this order was Clone Commander Cody (who until then was under the command of Jedi General Kenobi).