Controls given to one branch of government to limit the power of another branch are known as what?

Checks and Balances.

Explanation:

"Checks and Balances" maintain order by ensuring that, that certain branch can't take too much money or resources; without having to give other branches said money and resources.

imperial crisis leads to civil war.

roman forces withdraw from britain as goths attack rome.

odoacer topples romulus augustus

huns attack the empire and drive german peoples ahead of them.