Battle of the Catalaunian Plains
The Battle of the Catalaunian Plains (also called the Battle of Châlons-sur-Marne or Battle of Châlons) was a battle in 451 AD. It took place in Châlons-sur-Marne, in northeast Gaul (nowadays France).  Roman legions commanded by Flavius Aetius allied with Visigoth soldiers led by Theodoric I, to defeat the armies of Attila the Hun.