Project Homeland › Nations

Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation, Montana

Lands ceded to the United States by treaty, law or executive order, 1830–1889, as Charles C. Royce recorded them in 1899 — 315,409 km² in 16 cessions across Minnesota, Montana, North Dakota, Nebraska, South Dakota, Wisconsin, Wyoming.

A cession records when the United States took title — not the full extent of a homeland, and much land was taken without any treaty. The link between each cession and present-day nations is the one the U.S. Forest Service and the National NAGPRA Program’s dataset records; the nation’s own account comes first. Corrections: [email protected].

Named in the treaties as: Sioux · Arapaho · Northern Cheyenne · Iowa · Medewakanton · Missouri · Omaha · Oto

Royce 699, 1889Royce 693, 1888Royce 653, 1884Royce 631, 1882Royce 632, 1882Royce 598, 1876Royce 599, 1876Royce 581, 1875Royce 614, 1875Royce 516, 1868Royce 584, 1868Royce 597, 1868Royce 300, 1851Royce 243, 1837Royce 154, 1830Royce 155, 1830
17841894 See them on the Homeland map

Cessions

Royce no.DateAs the schedule names the partiesSources
154July 15, 1830 Iowa; Medewakanton; Missouri; Omaha; Oto; Sauk and Fox; Sioux (Wahpeton and Sisseton Bands); Wahpekuta · with 22 other present-day nations Royce’s schedule · treaty text
155July 15, 1830 Iowa; Medewakanton; Missouri; Omaha; Oto; Sauk and Fox; Sioux (Wahpeton and Sisseton Bands); Wahpekuta · with 22 other present-day nations Royce’s schedule · treaty text
243September 29, 1837 Sioux · with 15 other present-day nations Royce’s schedule · treaty text
300September 17, 1851 Arapaho; Arikara; Assiniboin; Cheyenne; Crow; Gros Ventre; Mandan; Sioux · with 21 other present-day nations Royce’s schedule · treaty text
516April 29, 1868 Sioux · with 15 other present-day nations Royce’s schedule · treaty text
584April 29, 1868; June 23, 1875 Sioux · with 15 other present-day nations Royce’s schedule · treaty text
597April 29, 1868; September 26, 1876 Arapaho; Northern Cheyenne; Sioux · with 17 other present-day nations Royce’s schedule · treaty text
581March 16, 1875 Sioux · with 15 other present-day nations Royce’s schedule
614January 11, 1875; May 20, 1875; November 28, 1876; August 9, 1879 Sioux · with 15 other present-day nations Royce’s schedule
598September 26, 1876 Arapaho; Northern Cheyenne; Sioux · with 17 other present-day nations Royce’s schedule
599September 26, 1876 Arapaho; Northern Cheyenne; Sioux · with 17 other present-day nations Royce’s schedule
631January 24, 1882; March 2, 1889 Sioux · with 15 other present-day nations Royce’s schedule
632January 24, 1882 Sioux · with 15 other present-day nations Royce’s schedule
653March 20, 1884 Sioux · with 15 other present-day nations Royce’s schedule
693May 1, 1888 Indians of Fort Peck agency Royce’s schedule
699March 2, 1889 Sioux · with 15 other present-day nations Royce’s schedule

Lands proven before the Indian Claims Commission

Areas on the Commission’s 1978 map that this nation, or nations it is part of, proved they held when the United States took them:

Trails across these lands

Maps on Native Routes that cover these lands

Cession areas: “Tribal Lands Ceded to the United States” (USDA Forest Service, National NAGPRA Program, EPA and Claudio Saunt, 2018; CC BY 4.0), digitized from Charles C. Royce, Indian Land Cessions in the United States (1899). Outlines simplified to about 1 km. Part of Project Homeland v0.5.2 — how it was made.