The Treaty with the Kalapuya, etc., also known as the Kalapuya Treaty or the Treaty of Dayton, was an 1855 treaty between the United States and the bands of the Kalapuya tribe, the Molala tribe, the Clackamas, and several others in the Oregon Territory. In it the tribes were forced to cede land in exchange for promised permanent reservation, annuities, supplies, educational, vocational, health services, and protection from ongoing violence from American settlers. The treaty effectively gave over the entirety of the Willamette Valley to the United States and removed indigenous groups who had resided in the area for over 10,000 years. The treaty was signed on January 22, 1855, in Dayton, Oregon, ratified on March 3, 1855, and proclaimed on April 10, 1855.
