Battle of Chalons
The Battle of Chalons took place in A.D. 451 during the twilight period of the Roman Empire. During this time, the Romans had to count heavily on military alliances with neighboring barbarian tribes to keep their empire from being overrun.
The Romans joined forces with the Visigoths and defeated the Huns and their allies in Gaul. The Huns were led by their famous leader Attila, known as the "Scourge of God". The victory by the Romans was considered a monumental event in history as it prevented Europe being overrun by Asiatic conquerors and allowed Christianity to continue to flourish.
Encyclopedia of Military History, Dupuy & Dupuy, 1979