Darth Marr was a Human male Dark Lord of the Sith and a member of the reconstituted Sith Empire’s ruling Dark Council during the Great Galactic War, Cold War, and Galactic War with the Galactic Republic. A fearsome warrior and stalwart defender of the Empire, Darth Marr was born in 3702 BBY and assumed a seat on the Dark Council in his early twenties, leading the Sphere of Defense of the Empire as he drove back entire armies and halted Republic offensives during the Great War. By the end of the war in 3653 BBY, Marr had trained an apprentice by the name of Darth Lachris to the rank of Sith Lord and was one of only seven remaining Councilors. He continued to strengthen Imperial defenses and prepare for the inevitable conflict throughout the Cold War, distancing himself from the power plays and treachery that plagued the Council and weakened the Empire.

As war broke out with the Republic, Marr watched as the Dark Council’s numbers dwindled thanks to both the enemy and internal feuding, and he assumed a leadership role alongside fellow Councilors Darth Mortis and Darth Ravage after the deaths of Darth Baras and Darth Decimus, the heads of the Spheres of Military Offense and Military Strategy, left him in sole command of the Imperial Military. In doing so, he was seen as the unofficial leader of the Empire up until his death.