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The Oregon Country/Columbia District stretched from 42°N to 54°40′N. The most heavily disputed portion is highlighted. The Oregon boundary dispute or the Oregon Question was a 19th-century territorial dispute over the political division of the Pacific Northwest of North America between several nations that had competing territorial and commercial aspirations in the region.
Agitation in favor of self-government developed in the regions of the Oregon Territory north of the Columbia River in 1851–1852. [3] A group of prominent settlers from the Cowlitz and Puget Sound regions met on November 25, 1852, at the "Monticello Convention" in present-day Longview, to draft a petition to the United States Congress calling for a separate territory north of the Columbia River.
An enlargeable map of the United States after the Anglo-American Convention of 1818 An enlargeable map of the United States after the Adams-Onís Treaty took effect in 1821 An enlargeable map of the United States after the Oregon Treaty of 1846 An enlargeable map of the United States after the Oregon Organic Act in 1848 An enlargeable map of the United States after Oregon Statehood in 1859 An ...
An enlargeable map of the United States after the Treaty of Paris in 1789 An enlargeable map of the United States after the Anglo-American Convention of 1818 An enlargeable map of the United States after the Oregon Treaty of 1846 An enlargeable map of the United States after the Washington Organic Act in 1853 An enlargeable map of the United States after Washington Statehood in 1889 An ...
Upon the admission of the State of Oregon to the union in 1859, the eastern portions of the Oregon Territory, including southern Idaho, portions of Wyoming west of the continental divide (then Nebraska Territory), and a small portion of present-day Ravalli County, Montana were annexed to the Washington Territory. In 1863, the area of Washington ...
The Territory of Oregon originally encompassed all of the present-day states of Idaho, Oregon and Washington, as well as those parts of present-day Montana and Wyoming west of the Continental Divide. [9] Its southern border was the 42nd parallel north (the boundary of the Adams-Onis Treaty of 1819), and it extended north to the 49th parallel.
The northern and eastern portions were separated in 1853, becoming the new Washington Territory (up to its 42nd statehood as Washington state in 1889), and subsequently the eastern portion also separated a decade later becoming the Idaho Territory (1863-1890),then becoming the 43rd state of Idaho in 1890.
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.