The fort was a strategic site in the French and Indian War. It fell to the
British after they conducted a nineteen-day siege in July 1759, which was called the
Battle of Fort Niagara. The French relief force sent to relieve the besieged garrison was ambushed at the
Battle of La Belle-Famille. The post's commander,
Pierre Pouchot, surrendered the fort to the British commander,
Sir William Johnson, who initially led the New York Militia. The Irish-born Johnson became the expedition's leader after
General John Prideaux literally lost his head; he stepped in front of a mortar being test-fired during the siege. The British controlled the fort for the next thirty-seven years before they handed it over to the Americans after the Revolutionary War. Fort Niagara served as the Loyalist base in New York during the American Revolutionary War for Colonel
John Butler and his
Butler's Rangers, a provincial military unit. Lt. Col.
William Stacy, a high-ranking officer of the
Continental Army, was captured by Butler's Rangers in their attack on
Cherry Valley, New York. He was held captive at Fort Niagara during the summer of 1779. Niagara became notorious for drinking, brawling, whoring, and cheating. Crude taverns, stores, and bordellos sprouted on "the Bottom", the riverside flat below the fort. Though the British ceded Fort Niagara to the United States after the
Treaty of Paris ended the
American War of Independence in 1783, the region remained effectively under British control for thirteen years. Only after signing of the
Jay Treaty did American forces occupy the fort in 1796. In the interim,
United Empire Loyalists fleeing persecution in the new US were given land grants, typically per inhabitant in
Upper Canada, and some were partly sustained in the early years by aid from the fort's military stores. During the
War of 1812, the fort's guns sank the
Provincial Marine schooner
Seneca on November 21, 1812. British forces
captured the fort on the night of December 19, 1813, in retaliation for the Americans' burning of Niagara, formerly called Newark, nine days earlier. Newark had been renamed Niagara in 1796. The British held the fort until they relinquished it under the terms of the
Treaty of Ghent. It has remained in US custody ever since.
Nine currently active battalions of the Regular Army (4-1 FA, 1-2 Inf, 2-2 Inf, 1-3 Inf, 2-3 Inf, 4-3 Inf, 1-4 Inf, 2-4 Inf and 3-4 Inf) are derived from American units (Leonard's Company, 1st Regiment of Artillery, and the old 14th, 19th and 22nd Infantry Regiments) that were at Fort Niagara during the War of 1812. 52 (Niagara) Battery Royal Artillery (Holcroft's Company, 4th Battalion
Royal Artillery),
Royal Scots and a number of other British units that fought at the
Capture of Fort Niagara still exist today. A number of other units that served in the Fort in the War of 1812 (such as
20 Battery Royal Artillery (Caddy's Company, 4th Battalion Royal Artillery)) also endure. ==Later use==