Unfair acts from England, winning revolutionary war, didn't want to duplicate England's monarchy.
The four enemies that the ancient Romans successfully battled against were the: Samnites, Etrusians, Celtics, and Carthaginians.
Answer:
Invasions from Barbarian tribes, The rising of Constantinople, Overexpansion, Government Corruption and Instability, Economic Troubles, Slave reliance for money, and Christainity rising.
