The United Kingdom, France and Spain. The UK established the 13 original states, the French colonized Quebec in Canada and the Spanish were the colonizers of Florida
Robert E. Lee was the leader of the rebellions
Two mountain ranges, the Alps and the Apennines, helped to protect Rome from invasion. The Apennines divide the Italian peninsula in half and, according to SPQR Online, allowed the Romans to mass forces for counter-attack whenever they were threatened.