sep 14, 476 - Odoacer becomes the first "barbarian" emperor of Rome
Odoacer deoposed the emperor Romulus Augustulus. After this, no Roman Emperor woudl ever rule again form a post in Italy. This was the end of the Western Empire. Without the Western Empire, the East was not as strong and the order particularly in western Europe ceased to exist.
Added to timeline:
Events that Led to the Growth and Fall of the Roman Empire