This former hostage of Alaric won his greatest victory with the assistance of Theodoric I of the Visigoths, who died in the battle; three years after, he was murdered on the orders of the jealous emperor Valentinian III.
The ruler who carried the assassination of this person was supposedly told "you have cut off your right hand with your left." Supposedly, after one of this Roman's victories, the ghosts of the slain carried on fighting for three days. This person dominated Roman politics after convincing Gallia Placidia to execute Comes Bonifacius, after he was recalled from exile. This man, who arranged for foederati to legendarily betray the Burgundian king Gunther, spent formative years as a hostage at Undin's court. After one battle, this man's enemies took a booty-filled wagon train they had used as a defense and fled across the (*) Rhine. This former hostage of Alaric won his greatest victory with the assistance of Theodoric I of the Visigoths, who died in the battle; three years after, he was murdered on the orders of the jealous emperor Valentinian III. For 10 points, name this general who defeated Attila the Hun at the Battle of the Catalaunian Fields.
The ruler who carried the assassination of this person was supposedly told "you have cut off your right hand with your left."
Flavius Aetius 