Answer :
The mentioned statement in the question is true which is the treaty resolved the outstanding border dispute by extending the border along the 49th parallel all the way to the Pacific coast.
Treaty, what is that?
Nations enter into treaties to form accords. Both bilateral and multilateral agreements between two or more countries are possible. Treaties' binding nature and incorporation into international law are their main benefits.
A treaty is it legal?
In addition to being a part of international law, treaties are legally binding agreements between governments. As a part of "the ultimate Law of the Land," as described in the Constitution, treaties to which the United States is a party also have the force of federal law.
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