Romulus Augustulus established the Roman Empire. The Roman Empire began when Augustus Caesar assumed the position of the first emperor of Rome and ended, in the west, when the last Roman emperor, Romulus Augustulus, was dethroned by the Germanic King Odoacer.
It is federal republic, because oligarchy and unitary republic are totally wrong. And the confederal republic was basically the old USA..
One important gain by the colonist after the French and Indian war is that they gained more land.
The United States has been a leading member of the United Nations although there have been disputes along the way.