Considering this, which army defeated the Romans?
In one of the most decisive battles in history, a large Roman army under Valens, the Roman emperor of the East, is defeated by the Visigoths at the Battle of Adrianople in present-day Turkey. Two-thirds of the Roman army, including Emperor Valens himself, were overrun and slaughtered by the mounted barbarians.
Also, who was the last great Roman? Marcus Aurelius
Similarly, you may ask, did the Romans ever lose a battle?
When The Romans Lost A Tenth Of Their Armies In A Single Battle – The Disaster Of The Teutoburg Forest. The Roman Empire of the 1st century AD is renowned as one of the most deadly and successful fighting forces in history.
What was the final fall of the Roman Empire?
Finally, in 476, the Germanic leader Odoacer staged a revolt and deposed the Emperor Romulus Augustulus. From then on, no Roman emperor would ever again rule from a post in Italy, leading many to cite 476 as the year the Western Empire suffered its deathblow.