 New York put up more than of former Iroquois territory for sale in the years after the Revolutionary War, leading to rapid development in upstate New York.As per the Treaty of Paris, the last vestige of British authority in the former Thirteen Colonies—their troops in New York City—departed in 1783, which was long afterward celebrated as Evacuation Day.New York City was the national capital under the Articles of Confederation and Perpetual Union, the first national government.