The Pax Romana was in Greece made by Augustus ceiser Julius Ceisers son and it went on all the way till Augustus died it ment the peace times of when Augustus was one of the best emperors of all time.
The XYZ Affair Cause tension to increase between United States and France. It led to an undeclared war on the United States. Because of it, Congress chose to increase defenses, so the Department of Navy and warships.
Get this from google I hope this help :)
That he was the reason for the watergate scandal