On the Plains the pattern was almost mechanical: promise territory and rations, then cut annuities, fail to stop gold-seekers, and send the Army when starving people left to hunt. The 1851 Fort Laramie treaty's payment term was slashed by Congress, and the 1867 Medicine Lodge rations went undelivered, helping drive the Red River War.
Fifty years and ten years are both correct at different stages of the 1851 treaty, and how informed tribal consent to the change was remains open. Whether Medicine Lodge was validly approved by the tribes is also questioned, and Grattan is increasingly called a fight, not a massacre.