British fort at mouth Oswego river, New York, on left bank. Built in 1726, under protest from the French, to open a route for the Indians to fort Albany on the Hudson river, Fort Niagara being under the French and closing that route. Fort Oswego was favoured by the Iroquois. Captured by Montcalm in July 1756 together with adjoining forts and mostly destroyed. After the conquest of Canada, Fort Oswego was rebuilt by the British. The name given by the French to this fort was De Chougnan and the Oswego river was called Onontaquis (Onondaga). Adjoining forts were Ontario, Oswego, and George. Maps No. 10 & 15.