The 501st Legion, also known as the 501st Battalion or «Vader’s Fist,» was an elite stormtrooper legion under the command of the Dark Lord of the Sith Darth Vader during the Imperial Era. The legion predated the Galactic Empire, its origins dating back to the time of the Clone Wars when the 501st was an elite military division of clone troopers in the Grand Army of the Republic. Under the leadership of Jedi General Anakin Skywalker, the 501st became known for their courage, unconventional tactics and loyalty to the Galactic Republic throughout the conflict against the Confederacy of Independent Systems. In addition to Skywalker, the 501st served under Jedi CommanderAhsoka Tano and Clone Captain CT-7567 «Rex.»