Oregon Treaty

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Oregon Treaty


(1846) (also Treaty of Washington), an agreement concluded between the USA and Great Britain on June 15, 1846. It resolved the dispute over possession of the territory extending from the Rocky Mountains to the Pacific Ocean between 42° and 54°40′ N lat.

Formally, by the terms of the 1818 agreement between the two countries, this territory had been jointly occupied. However, the Oregon Treaty provided for recognition of the territory north of the 49th parallel as a British possession; the land south of the 49th parallel went to the USA. Congress quickly ratified the treaty in view of the fact that the USA, involved in the Mexican War (1846–48), was in no position to go to war over Oregon.


Bemis, S. F. A Diplomatic History of the United States, 4th ed; New York, 1955.
References in periodicals archive ?
They range from ones about the impact of the maritime fur trade on aboriginal peoples, and the geopolitical machinations preceding the Treaty of Oregon, to the role of historians in forging a provincial identity.