Yes, there were treaties that took place in Prairie Island. One significant treaty was the Treaty of Traverse des Sioux, which was signed in 1851 between the United States government and several Dakota Indian tribes, including the Mdewakanton band of Dakota people from Prairie Island. This treaty resulted in the cession of millions of acres of Dakota land to the U.S. government in exchange for annuity payments and the creation of reservations, including Prairie Island. Another important treaty was the Treaty of 1858, which clarified land boundaries and further restricted Dakota tribal lands in Minnesota, including Prairie Island.
