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Battle of the Catalaunian Plains, took place on June 20, 451 AD, between a coalition - led by the Roman general Flavius Aetius and by the Visigothic king Theodoric I - against the Huns and their vassals - commanded by their king Attila.
The campaigns of the Huns under Attila in Europe, leading to their defeat at the Catalaunian Plains in 451 AD.
