Omaha treaties from the National Archives, and land Cessions from the Forestry Service.
Ratified Indian Treaty 159: Sauk and Fox, Sioux (Mdewakanton, Wahpacoota, Wahpeton, Sisseton, Yankton and Santee), Omaha, Iowa, Oto and Missouri - Prairie du Chien, Michigan Territory, July 15, 1830
Ratified Indian Treaty 159: Sauk and Fox, Sioux (Mdewakanton, Wahpacoota, Wahpeton, Sisseton, Yankton and Santee), Omaha, Iowa, Oto and Missouri - Prairie du Chien, Michigan Territory, July 15, 1830
Cession: 151
Cession: 152
Cession: 153
Cession: 154
Cession: 155
Cession: 292
Ratified Indian Treaty 217: Oto, Missouri, Omaha, and Sioux (Yankton and Santee Bands) - Bellevue, Upper Missouri, October 15, 1836
Ratified Indian Treaty 266: Omaha - Washington, DC, March 16, 1854
Cession: 315
Cession: 467
Cession: 570
Cession: 636
Cession: 637
Ratified Indian Treaty 334: Omaha - Washington, DC, March 6, 1865