The Oregon Treaty was signed between the United States and Great Britain (the United Kingdom) in 1846. It settled the Oregon boundary dispute and established the 49th parallel as most of the border.

Quick Scoop

  • Signed on June 15, 1846, in Washington, D.C.
  • Main parties: the United States and Great Britain.
  • Result: the Pacific Northwest border was largely set along the 49th parallel.

Why it mattered

The treaty ended years of joint occupation and avoided a war over the Oregon Country. It was an important compromise between American expansion and British interests in the region.