Answer:
Although maintaining a pretense of keeping some of the forms of the Republic, Octavius essentially established a monarchy and the Roman Republic came to an end. So the Roman Republic was successful for centuries, but faltered in its last decades due to civil strife.
I would say a civil war or uprising.
It depends on the key that they give you
False. If 2/3 of the states believe in an amendment, they can propose their idea.
Well, a simile can include "like" or "as," so you could say, "The Continental Army's victory in the American Revolution was as powerful as a bolt of lightning." Unless you have to use "like," then it could be, "The Continental Army's victory in the American Revolution was like a power-punch to their enemies."
Hope this helps!