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Answer: set the U.S.- Canada border
It was clearly stated in the Treaty of 1818 which also widen or expanded the United States that the U.S. - Canada border must be set at the 49th parallel. Treaty 1818 is also popularly known as "the convention respecting fisheries, boundary and the restoration of slaves". This marks a reset in the old borders and practices of the U.S.
Answer:
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