When did the roman empire fall

The Western Roman Empire officially ended 4 September 476 CE, when Emperor Romulus Augustulus was deposed by the Germanic King Odoacer (though some historians date the end as 480 CE with the death of Julius Nepos).

Explanation:

During the reign of Julius Nepos, since most of the soldiers were of German descent, Everest (commander of the Western Roman troops) was even more beloved than the king himself. So Orestes, who was of Roman-German descent, overthrew Julius and made his son Romulus Augustus king. But this time the troops, led by another German commander named Udoacer, revolted, killed Everest, exiled Romulus, and made Odoacer king.

Odoacer asked Zeno, the Eastern Roman emperor, to recognize him as the nobleman and ruler of Italy from eastern Syria. Zeno accepted the request, but said that Nepus, even formally, should remain the Roman emperor. Odwalker accepted this, and the gold coins minted in his time were engraved with the name Nepus. Thus Nepus can be considered the last Roman emperor of Western Rome, but in practice Julius Nepus remained in exile and could not regain his throne.