Oregon Treaty of 1846 Largely Settles U. S.-Canadian Border [otd 06/15]

President Polk. Library of Congress.On June 15, 1846, the United States and Great Britain reached an agreement that settled almost all the remaining disputes about the border between the U. S. and Canada. This treaty, arranged under President James K. Polk, meant that the future states of Idaho, Oregon, Washington, and some of Montana were indeed part of the United States.

The U. S.-Canadian boundary had been established as far west as the Continental Divide by the "joint occupancy" treaty of 18...