What Are The Three Confederated Tribes Of The Umatilla Indian Reservation?
What Are The Three Confederated Tribes Of The Umatilla Indian Reservation? Three tribes make up the CTUIR: Cayuse, Umatilla and Walla Walla. They have lived on the Columbia River Plateau for over 10,000 years, an area of about 6.4 million acres in what is now northeastern Oregon and southeastern Washington. What Indian tribe is in