The reservation was created in 1855 by a treaty signed by
Washington Territory Gov.
Isaac Stevens and representatives of the Yakama tribe. Several Native leaders believed that those representatives did not have the authority to cede communal land and had not properly gained consensus from the full council or tribe. A dispute over the treaty conditions led to the
Yakima War (1855–1858), which the Yakama and allied tribes waged against the United States. Following the
Bannock War of 1878, the United States government forced the
Northern Paiute people out of
Nevada and onto the Yakama Reservation, although most had not been involved in the war. The more than 500 Paiute in Washington were subjected to privation for more than a decade before being allowed to return to Nevada. They were forced to compete for the limited resources and housing on the reservation with peoples who had been established there for decades. The Paiute did not return to Nevada until the 1886 expansion of the
Duck Valley Indian Reservation permitted them to reunite with their
Western Shoshone brethren. In 1994, the Yakima Tribal Council unanimously voted to change the spelling of the tribe's name from
Yakima to
Yakama, matching the spelling of the 1855 treaty. The pronunciation remained the same. The Yakama reservation was affected by the Cougar Creek fire, one of the
2015 Washington wildfires. About 80% of the Cougar Creek fire burned on reservation land. The Yakama responded by
salvage logging. ==Membership==