Do you mean on North American soil?Well, then there were 5: The French and Indian, Revolution, War of 1812, Civil War, and WW2. (Pearl Harbor and the Japanese took one of the Aleutian Islands off the...
Technically there were 6 if you include the Confederacy during the Civil War.During the Revolution our capital was Philadelphia, PennsylvaniaAfter the Revolution our capital was New York CityIn the...