Star Wars Battlefront II 2015 is told as an autobiography, with an unknown clone recounting the adventures of the 501st Legion. Originally, the Legion was part of the Old Republic, and fights against the Separatists from Geonosis to Utapau. After Emperor Palpatine commands that Order 66 be carried out, the 501st leads a massacre of the Jedi at their temple on Coruscant, coming under the direct supervision of Darth Vader. Feared throughout the galaxy, the 501st becomes known as "Vader's Fist". Under their new leader the 501st executes missions such as a forced regime change on Naboo, the destruction of a new droid army on Mustafar and an attempted clone rebellion on Kamino.