In 1832, during the Indian removal period, a group of Potawatomi chiefs signed a treaty with the U.S. government setting aside for the Potawatomi in perpetuity an area of 14,000 acres (57 km2) in the vicinity of the Yellow River; this land was sold at the 1836 Treaty of Yellow River, signed by three Potawatomi chiefs, which stipulated that all Potawatomi move west of the Mississippi River within two years.