Borders From 1818 Not 1803

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 United States 327

     The northwestern border of the Louisiana Purchase with Canada was not the 49th parallel. Instead that border extended north of that parallel, while Canada intruded into northern Minnesota and North Dakota. These departures from the 49th parallel were mutually ceded in the Convention between Great Britain and the United States in 1818, so that from the Stony Mountains to the Lake of the Woods, the border follows the 49th parallel. Another error is the claim of territory in Spanish Florida. The United States acquired Florida from Spain by the Adams-Onís Treaty of 1819.

SCN 327

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