Dictionary.net

The treaty of peace with Great Britain (1783) provided that the boundary of the United States should be Lakes Ontario, Erie, St. Clair, Huron and Superior, and that the British should at once evacuate all posts within the United States. But Great Britain continued to hold the posts on the great lakes, Oswegatchie (now Ogdensburg), Oswego, Niagara, Presque Isle (now Erie), Sandusky, Detroit, Mackinaw, and some others of less importance, on the ground that the American States had not complied with the requirement that debts due to British citizens should be paid. Again their surrender was stipulated in the Jay Treaty, and they were finally given up in June, 1796.