First Treaty of Prairie du Chien

The Treaty of Prairie du Chien may refer to any of several treaties made and signed in Prairie du Chien, Wisconsin between the United States, representatives from the Sioux, Sac and Fox, Menominee, Ioway, Winnebago and the Anishinaabeg (Chippewa, Ottawa and Potawatomi) Native American peoples.

The first treaty of Prairie du Chien was signed by William Clark and Lewis Cass for the United States and representatives of the Sioux, Sac and Fox, Menominee, Ioway, Winnebago and the Anishinaabeg (Chippewa and the Council of Three Fires of Chippewa, Ottawa and Potawatomi) on August 19, 1825, proclaimed on February 6, 1826, and codified as 7 Stat. 272.

Due to the overall tribal movements toward the western direction under pressure of encroaching settlers, the Sioux Nation resisted and came into conflict with other tribes moving west into their traditional territory. The United States negotiated the treaty to try to reduce inter-tribal warfare.

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