Nation
Fort Belknap Indian Community of the Fort Belknap Reservation of MontanaFort Belknap Indian Community of the Fort Belknap Reservation of Montana
Not yet reviewed by this nation. What follows comes from public records and research. It does not speak for the nation.
- Official name
- Fort Belknap Indian Community of the Fort Belknap Reservation of Montana
- Recorded status
- Listed by the Bureau of Indian Affairs (91 FR 4102, January 30, 2026)
In the record
This nation carries the history of Assiniboine (Nakoda) and Gros Ventre (Aaniiih) in the treaty record.
Written from the records linked here; open any of them for its sources. This is what the United States’ treaty record says, not the nation’s own account.
The record over time
Circles are land the United States recorded as ceded, sized by acres and colored by how it was taken. Bars are treaties, broken promises, court cases and land returns.
Land recorded as ceded
This nation carries the history of peoples named in Royce’s schedule. Their record:
- Treaty or agreement15 million
- Act of Congress2 million
- Executive order24 million
Estimate from Royce’s maps; overlapping cessions counted once. Not a survey or legal measure.
11 cessions. Follow Gros Ventre (Aaniiih) through the years on the map
Who is doing the work
Native legal and land defense, nationally
- Native American Rights Fund (NARF) Native-led Litigation and legal advocacy for tribal sovereignty, treaty rights, land and resources Give on their site Website
- NDN Collective (LANDBACK Campaign) Native-led LANDBACK campaign (launched 2020; Mount Rushmore closure and return of Black Hills public lands), Indigenous… Give on their site Website
- Indian Land Tenure Foundation (ILTF) Native-led Land recovery and control by tribes and individual Indian landowners Website
- Decolonizing Wealth Project (Indigenous Earth Fund; California Tribal Land Return) Native-led Reparative philanthropy Give on their site Website
Gifts go straight to each organization; this atlas takes nothing. Listing is not endorsement: how organizations are listed.
Connections
These links were matched automatically by name or date and have not yet been reviewed by a person.
Land recorded in this nation’s name 12, matched by the Forest Service, under review
- Land of the Arikara, Gros Ventre and others in Montana and North Dakota, ceded 1880 (area 620)1851
- Land of the Arikara, Gros Ventre and others in Montana, North Dakota and Wyoming, ceded 1870 (area 529)1851
- Reservation of the Arapaho, Arikara and others in Montana and North Dakota (area 300)1851
- Reservation of the Arikara, Gros Ventre and others in North Dakota (area 621)1851
- Land of the Blackfoot, Blood and others in Montana, ceded 1874 (area 574)1855
- Reservation of the Blackfoot, Blood and others in Montana (area 565)1855
- Land of the Blackfoot, Blood and others in Montana, ceded 1880 (area 622)1875
- Land of the Blackfoot, Blood and others in Montana, recorded 1875 (area 623)1875
- Land of the Gros Ventre and Piegan in Montana, ceded 1888 (area 692)1888
- Reservation of the Indians of Fort Belknap agency in Montana (area 694)1888
- Land of the Gros Ventre and Mandan in North Dakota, ceded 1891 (area 712)1891
- Land of the Gros Ventre and Mandan in North Dakota, recorded 1891 (area 713)1891
Carries the treaty history of 2
Sources
- ftbelknap.org/unclassified
Fort Belknap Indian Reservation is homeland to the Assiniboine (Nakoda) and Gros Ventre (Aaniiih) Tribes.
- Indian Entities Recognized by and Eligible To Receive Services From the BIA, 91 FR 4102 (Jan. 30, 2026)primary record
Listed in 91 FR 4102 (Jan. 30, 2026).
- Kind
- Nation
- Confidence
- High
- Nation review
- Not yet reviewed by this nation