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  2. 49th parallel north - Wikipedia

    en.wikipedia.org/wiki/49th_parallel_north

    In 1909 the United States, United Kingdom, and Canada signed and ratified a treaty confirming the original survey lines as the official and permanent international border. Nevertheless, in 2002 the difference of the survey from the geographical 49th parallel was argued in front of the Washington Supreme Court in the case of State of Washington v.

  3. Oregon boundary dispute - Wikipedia

    en.wikipedia.org/wiki/Oregon_boundary_dispute

    The Americans suggested dividing the Pacific Northwest along the 49th parallel, which was the border between the United States and British North America east of the Rocky Mountains. The lack of accurate cartographic knowledge led American diplomats to declare the Louisiana Purchase gave them an incontestable claim to the region. [ 9 ]

  4. Oregon Treaty - Wikipedia

    en.wikipedia.org/wiki/Oregon_Treaty

    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.

  5. Treaty of 1818 - Wikipedia

    en.wikipedia.org/wiki/Treaty_of_1818

    In fixing the problem, the 1818 treaty created a pene-enclave of the United States, the Northwest Angle, the small section of the present state of Minnesota that is the only part of the United States apart from Alaska that lies north of the 49th parallel. Article III provided for joint control of land in the Oregon Country for ten years. Both ...

  6. Northwest Angle - Wikipedia

    en.wikipedia.org/wiki/Northwest_Angle

    Excluding surveying errors, [2] it is the only place in the contiguous United States north of the 49th parallel, which forms the border between the U.S. and Canada from the Northwest Angle westward to the Strait of Georgia (between the U.S. state of Washington and the Canadian province of British Columbia).

  7. List of extreme points of U.S. states and territories - Wikipedia

    en.wikipedia.org/wiki/List_of_extreme_points_of...

    The 49th parallel was agreed to be the border between the United States and British North America (later Canada) from Lake of the Woods to the Strait of Juan de Fuca in the Treaty of 1818 and Oregon Treaty. However, the true boundary line as surveyed deviates several seconds from the true parallel, as seen in this significantly exaggerated ...

  8. Oregon Country - Wikipedia

    en.wikipedia.org/wiki/Oregon_Country

    In the 1820s, Russia gave up its claims south of 54°40′ and east of the 141st meridian in separate treaties with the United States and Britain. [17] Meanwhile, the United States and Britain negotiated the Anglo-American Convention of 1818, which extended the boundary between their territories west along the 49th parallel to the Rocky ...

  9. Pacific Northwest - Wikipedia

    en.wikipedia.org/wiki/Pacific_Northwest

    The United States established a claim based on the discoveries ... The mainland territory north of the 49th parallel remained unincorporated ... Map of "megacity ...