The three flags flown daily above the parade ground symbolize the nations which have held Fort Niagara. Each competed for the support of a fourth nation; the powerful Iroquois Confederacy. The French established the first post here, Fort Conti, in 1679. Its successor, Fort Denonville (1687–88) was equally short lived. In 1726 France finally erected a permanent fortification with the construction of the impressive "French Castle." Britain gained control of Fort Niagara in 1759, during the French & Indian War, after a nineteen-day siege. The British held the post throughout the American Revolution but were forced, by treaty, to yield it to the United States in 1796. Fort Niagara was recaptured by the British in 1813. It was ceded to the United States a second time in 1815 at the end of the War of 1812.