 The Illinois Potawatomi moved to present-day Nebraska and the Indiana Potawatomi moved to present-day Osawatomie, Kansas, an event known as the Potawatomi Trail of Death.The group settling in Nebraska adapted to the Plains Indian culture but the group settling in Kansas remained steadfast to their woodlands culture.In 1867 part of the Kansas group negotiated the "Treaty of Washington with the Potawatomi" in which the Kansas Prairie Band Potawatomi Nation split and part of their land in Kansas was sold, purchasing land near present-day Shawnee, Oklahoma, they became the Citizen Potawatomi Nation.