re: Giving speech on fall of Rome

Rome was a melting pot of sorts... The late emperors even came from barbarian decent. As those barbarian armies were driven east by the hun invasion, it became too hard for Rome to keep up it's borders. Eventually the empire went down without much of a fight, ceding land to invading tribes and running out of money to buy armies to fight its battles.

Obviously the op may have a different talking point as there are many theories, but based on my knowledge that the gist of it.