what agreement did the united states and britain reach about oregon country
Historical Summary. The Oregon Treaty of 1846 was an agreement with Great Britain that gave the U.S. undisputed claim to the Pacific Northwest south of the 49th parallel. The states carved out of this treaty are the present states of Oregon, Washington, Idaho and the southwest corner of Wyoming.he Oregon Treaty of 1846 was an agreement with Great Britain that gave the U.S. undisputed claim to the Pacific Northwest south of the 49th parallel.