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The Territory of Oregon was an organized incorporated territory of the United States that existed from August 14, 1848, [1] until February 14, 1859, when the southwestern portion of the territory was admitted to the Union as the State of Oregon.
Unorganized territory created by the Oregon Treaty, 1846–1848; Territory of Oregon, 1848–1859 Oregon Organic Act, August 14, 1848 [1] Northern portion of Oregon Territory incorporated in new Washington Territory, March 2, 1853; State of Deseret (extralegal), 1849–1850; State of Oregon since 1859 Oregon Statehood Act, February 14, 1859 [2 ...
The Oregon Treaty [a] was a treaty between the United Kingdom and the United States that was signed on June 15, 1846, in Washington, D.C. The treaty brought an end to the Oregon boundary dispute by settling competing American and British claims to the Oregon Country; the area had been jointly occupied by both Britain and the U.S. since the Treaty of 1818.
Accession Date Area (sq.mi.) Area (km 2.) Cost in dollars Original territory of the Thirteen States (western lands, roughly between the Mississippi River and Appalachian Mountains, were claimed but not administered by the states and were all ceded to the federal government or new states by 1802)
Oregon Country was the American name, while the British used Columbia District for the region. [1] British and French Canadian fur traders had entered Oregon Country prior to 1810 before the arrival of American settlers from the mid-1830s onwards, which led to the foundation of the Provisional Government of Oregon.
Looming large in pale yellow is the vast Oregon Territory — until only recently jointly administered by the U.S. and Great Britain and stretching up to the 54º 40' parallel of North latitude. For this area, the map largely followed the printed map of Oregon from the report of Charles Wilkes's expedition.
With the signing of the Oregon Treaty in 1846 the U.S.-British boundary was fixed on the 49th parallel. This effectively destroyed the geographical logic of the HBC's Columbia Department, since the lower Columbia River was the core and lifeline of the system. The U.S. soon organized its portion as the Oregon Territory.
Oregon Territory (1848-1853/1859), established by the United States Congress and approved by the President, two years after its sovereignty over the southern portion of the region was established by the Oregon Treaty of June 1846, splitting the earlier Oregon Country with the northern portion going to Great Britain / future Canada.