Which agreement did Britain and the United States make in the Treaty of 1818

The Convention of 1818 was a treaty between the United States and Britain that set the 49th parallel as the boundary between British North America and the US across the West. Cutting on the 49th parallel, on the right bank of the Moyie River, looking west, 1860 (courtesy North American Boundary Commission). Feb 6, 2006

In the treaty of 1818 between Great Britain and the United States of America, this included respecting the boundaries, fisheries and slaves.