Parallel — 49th

A notable exception occurs at Vancouver Island, where the border swings south to ensure the entire island remains British. Geographic and Cultural Impact

The use of the 49th parallel as a border was not the result of a single event but a series of 19th-century treaties: 49th Parallel

Following the War of 1812, Britain and the U.S. agreed to set the 49th parallel as the border from the Lake of the Woods in the east to the Rocky Mountains in the west. A notable exception occurs at Vancouver Island, where