The Western Empire fell do to vandals, barbarians, and more. It fell in 476 CE.
4 reasons Rome fell
Barbarians
Rome had a string of loses to Germanic barbarians.
Over expansion
Because it was so big it was hard to defend all of its borders.
government corruption
The emperors that Rome had were very bad and they had 20 emperors in 75 years.
over reliance of slaves
Rome was very reliant on slaves but when Rome stopped expanding the ran out of slaves.
the Eastern empire (in purple) was the more successful part of the roman empire. It last far longer than the western part did. It eventually fell in 1453 AD.
Constantine had a very big impact on Rome by being the first Christian emperor.