In 1868, many Lakota leaders of the Sioux nation agreed to a treaty, known as the Fort Laramie Treaty that created a large reservation for them in the western half of present-day South Dakota. They agreed to give up their nomadic life, which often brought them into conflict with other tribes in the region, with settlers, and with railroad surveyors, in exchange for a more stationary life relying on government-supplied subsidies. However, some Lakota leaders such as Sitting Bull and Crazy Horse...