Territorial evolution of the United States Territorial evolution of the United States The United States of America was created on July 4, 1776, with the declaration of independence of thirteen British colonies. Their independence was recognized by Great Britain with the Treaty of Paris of 1783, following the American Revolutionary War. This effectively doubled the size of the colonies, now able to stretch west past the Proclamation Line to the Mississippi River. This land was organized into territories and then states, though there remained some conflict with the sea-to-sea grants claimed by some of the original colonies. In time, these grants were ceded to the federal
United Kingdom–United States relations Atlantic, such as the Baptists, Methodists, Congregationalists and Episcopalians. Britain and the United States practise what is commonly referred to as an Anglo-Saxon economy in which levels of regulation and taxes are relatively low, and government provides a low to medium level of social services in return. Independence Day, July 4, is a national celebration which commemorates the July 4, 1776 adoption of the Declaration of Independence from the British Empire. American defiance of Britain is expressed in the American national anthem, "The Star Spangled Banner", written during the War of 1812 to the tune of a British celebratory song