an unprotected one.........
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The Canada US border has been described as an "undefended" border, but it is by no means an "unprotected" one. Even the "undefended" nature of the border is now questioned by many.
which waterways make up almost half the boundary between the united states and Canada
It was an agreement between Great Britain and the US that detailed the boundary between Oregon Country and Canada.
The great Lakes
It is the Canda-United States border, but is officially known as the International Border.
The 49th parallel of latitude forms the border between Canada and the US from Lake of the Woods to the Georgia Strait. The 45th parallel of latitude also forms part of the border between Canada and the US along the northern boundaries of the states of New York, Vermont and New Hampshire.
The Monroe Doctrine
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.
The great lakes
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.
Canada forms the northern boundary of the United States.
The great Lakes
Convention 0f 1818
It is the Canda-United States border, but is officially known as the International Border.