Treaty between the United States and the confederated tribes and bands of Indians in middle Oregon. June 25, 1855. Ratified April 18, 1859.

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Published text of a supplement to the Treaty of June 25, 1855 that established sovereignty for many nations on the Columbia Plateau. The treaty was signed in Wasco, Oregon and ratified in 1859 under President James Buchanan.

Location Description: 

Wasco, OR