Score Saves Make Sure The Trial Is Not On The Buy Button When You Click The Helmet Who Are The 501St Legion? The 501st Legion,[note 1] nicknamed Vader's Fist, was a famous legion led by Anakin Skywalker, Clone Captain Rex, and later Commander Appo. One unit in the 501st was the Torrent Company. The 501st participated in many major battles including the Battles of Christophsis, Teth, Umbara, Ringo Vinda, Anaxes and Coruscant. The clone trooper battalion, was put under the leadership of Jedi General Anakin Skywalker with clone captain Rex, while Rex was succeeded by Appo at the end of the war. The 501st was present from the beginning of the Clone Wars until Legacy Era.