Terratorial Aquisition: 1818

The treaty marked the last permanent major territorial loss of Continental United States, the northern most tip of the territory of Louisiana above the 49th parallel north, known as the Milk River in present day southern Alberta. Britain ceded all of Rupert's Land south of the 49th parallel and west to the Rocky Mountains, including the Red River Colony [of which our area was considered part of, at that time - Trish Lewis]

From Treaty of 1818