Sith trooper legions were numerically identified, yet also named after an ancient Sith Lord. The Revan Legion was activated in 35 ABY along with the rest of the Sith Eternal’s forces during the war between the First Order and the Resistance.
Revan was originally introduced in the Star Wars Legends continuity in BioWare and LucasArts‘s 2003 video gameStar Wars: Knights of the Old Republic. There, Revan was the playable character of the game, with his physical characteristics and gender being customizable by the player. Revan’s male gender was then confirmed in The New Essential Chronology and his appearance in Star Wars: The Old Republic.