If the judicial branch wasn't impartial, what threat or problems might that pose for our country?

If the Judicial Branch wasn't impartial the Judges and Juries would all vote the same way. The Checks and Balances would be interrupted if the Judicial Branch was partial.

Explanation:

an era of negotiation.

is that an answer to your question?

c. troops marched forward in close formation against newer, more accurate weapons