in the 1820s, the u.s. government gave the land to the native americans as indian territory. they did not let white people come to the territory. on june 3, 1825, the u.s. government took 20 million acres of land (81000 km²) from the kansa people. the kansa people had to stay on a small amount of land in northeastern kansas. the u.s. government also made the osage nation live in a small amount of land in southeastern kansas.