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The Monroe Doctrine
8891 kms
What saint Lawrence river forms a boundary between the Canadian province of
which waterways make up almost half the boundary between the united states and Canada
nope
The Western part of the US-Canada boundary lies on the 49th parallel north, a latitudinal measure.
It was an agreement between Great Britain and the US that detailed the boundary between Oregon Country and Canada.
A long section of the US-Canadian border is along the 49th parallel north. It is an artificial boundary, and at one point attempts were made to bring it as far north as 54 degrees, before the 49th was agreed upon.
The great lakes
Minnesota's border with Canada is longer than North Dakota's border. The boundary between the US state of North Dakota and the Canadian Provinces of Manitoba and Saskatchewan is 310 miles (499 km) long. The boundary between the US state of Minnesota and the Canadian Provinces of Manitoba and Ontario is 547 miles (880 km) long.
Pennsylvania has the shortest international land boundary of all the US states. The border between Pennsylvania and Canada is 42 miles long. The border between Canada and Idaho is 45 miles long. Alaska shares 1,538 miles of border with Canada.
St Lawrence River (between New York and Ontario) and St Croix River (between Maine and New Bruinswick) both form part of the International Boundary between Canada and the US.