Land+Cede,+Treaty+of+1818

**LAND CEDED TO GREAT BRITAIN 1818** The land that would have been an upper part of Montana was given to the British in the Treaty of 1818, in which Britain was given the upper part of Montana and other surrounding areas. When the border was placed at the forty-ninth Parallel of the North Latitude, we obtained most of Montana and the surrounding land, except for that part of the land, as it was on the otherside of the new border.