The goal of the United States in…
1854 CE
The basic treaty area of the Arikara, the Hidatsa and the Mandan is a mutual territory north of Heart River, encircled on the east and north by the Missouri and on the west by Yellowstone River down to the mouth of Powder River.
The Lakota had continued to press north after 1823, so they got treaty rights on the area along Grand River as well as other land south of Heart River.
Peace was short-lived.
As drawings collected by W. J. Hoffman of Hunkpapa Chief Running Antelope will show, in 1853 he already had killed four Arikara Indians.
The next year the Three Tribes call for the U. S. Army to intervene; that request will be repeated over the next two decades.
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