Revan, a legendary Jedi Master and Prodigal Knight, also known as the Revanchist and formally identified as the infamous Sith Lord Darth Revan, is one of the main protagonists of the Old Republic era of the Star Wars franchise.
He was a Jedi Knight who led the Republic to victory against the Mandalorian Neo-Crusaders during the Mandalorian Wars, only to succumb to the Dark Side during the war after developing an ends-justify-the-means philosophy and also delving into Sith secrets on Korriban and Malachor V.
Tracking down the ancient Star Maps, Revan discovered the space station known as the Star Forge. Though he became a feared and ruthless Sith Lord, Revan lost his memories after nearly being killed by his traitorous apprentice Malak.