Long the home of Sisseton, Wahpeton & Cuthead Yanktonaise Sioux, it became part of Deuel & Cheyenne Counties in 1862; Deuel extending N to 46th parallel (4 miles N) in 1872. The Reservation extending S to Lake Kampeska in a giant flatiron was esta…
Created west of the Sisseton Reservation Line, surveyed in 1869; from Greeley (South) and Stone (North) so named in 1873; by the Legislature of 1879; it was named for Merritt H. Day of Turner County, a member. Before that, its area had been in a G…