The Cayuse are a Native American tribe in the state of Oregon in the United States. The Cayuse tribe shares a reservation in northeastern Oregon with the Umatilla and the Walla Walla tribes as part of the Confederated Tribes of the Umatilla Indian Reservation. The reservation is located near Pendleton, Oregon at the base of the Blue Mountains. The Cayuse call themselves the Tetawken, which means "we, the people". Originally located in northeastern Oregon and southeastern Washington, they lived adjacent to territory covered by the Nez Perce. Like the Plains tribes, the Cayuse placed a high premium on warfare and were skilled horsemen, often using their horse-riding prowess to intimidate other tribes. Skilled horsemanship proved beneficial to the Indians and the neighboring cowboys who adopted the Cayuse pony. The Cayuse moved to the Umatilla Reservation after signing a treaty with the U.S. federal government in 1855.
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