when did the united states officially become a country
History of the United States The Thirteen Colonies began a rebellion against British rule in 1775 and proclaimed their independence in 1776 as the United States of America. In the American Revolutionary War (1775â€“83) the Americans captured the British invasion army at Saratoga in 1777, secured the Northeast and encouraged the French to make a military alliance with the United States. France brought in Spain and the Netherlands, thus balancing the military and naval forces on each side as Britain had no allies.[49]