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Signing of the Oregon Treaty

Name: Signing of the Oregon Treaty
Start: 1846-06-15
End: 1846-06-18
Location: Washington, D.C.

When: June 15–18, 1846
Where: Washington, D.C.
Part of: Oregon Treaty sets the 49th parallel boundary

The Oregon Treaty was signed in Washington, D.C., on June 15, 1846, ending joint occupation and establishing the 49th parallel as the boundary.

Signed by Pakenham and Buchanan, the treaty settled the dispute by making Oregonians south of the 49th parallel American citizens. The marine boundary curved south to exclude Vancouver Island. The U.S. Senate ratified the treaty on June 18, 1846, by a vote of 41–14.

Sources

Oregon Treaty Wikipedia, revision of 2026-09-16
Oregon boundary dispute Wikipedia, revision of 2026-09-01

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.