Becoming Walla Walla covers Walla Walla Valley history from the time of the Sahaptian Peoples’ first encounters with Euro-Americans to the initial expiration of the U.S. government’s treaty with the Cayuse, Walla Walla, and Umatilla. It sheds light on the city’s and reservation’s simultaneous development, re-animates the Walla Walla of the 1860s and 70s, reconsiders its status in early Washington Territory and Oregon State histories, and documents transformations of the region’s built and natural environments.