The Oregon Treaty, negotiated between Great Britain and the United States, settled peacefully the question of where British Canada ended and the US-controlled Oregon Territory began.
The last one
Congress claimed the following powers: to make war and peace; conduct foreign affairs; request men and money from the states; coin and borrow money; regulate Indian affairs; and settle disputes among the states.
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Anasazi
They lived during the 13th century (A.D) in the Mesa Verde region.