 A Half-Breed Tract was located in Lee County, Iowa.An 1824 treaty between the Sauk people, the Fox tribe, and the United States set aside a reservation for mixed-blood people related to the tribes.Lying between the Mississippi, and Des Moines rivers and below an eastward extension of the Sullivan Line (The old Indian boundary surveyed out by John C. Sullivan in 1816—at approximately 40.60° N.), the Tract occupied an area of approximately .