The Nemaha Half-Breed Reservation was established by the Treaty of Prairie du Chien of 1830, which set aside a tract of land for the mixed-ancestry descendants of French-Canadian trappers and women of the Oto, Iowa, and Omaha, as well as the Yankton and Santee Sioux tribes. Located in part of the Indian Territory, which was later in the Nebraska Territory and then the state of Nebraska, the tract's eastern border was the Missouri River. The reservation extended west for 10 miles (16 km).
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