The Government purchased a tract of land along the east bank of the Missouri River, not part of the state of Missouri in 1836 from the Ioway, Sac, Fox and Algonquin tribes. This is known as the Platte Purchase and involved the present day counties of Andrew, Atchison, Buchanan, Holt, Nodaway and Platte.
Prior to this purchase, Native American tribes had been promised that those who were living in unorganized parts of Missouri could keep their lands permanently. However, when Lewis and Clark had explored the region, they had referred to the area as beautiful and fertile, which meant that it was only a matter of time before it would not longer be considered unorganized.
This treaty forced the Ioway tribe into the Upper Nemaha Reservation and the Sac and Fox tribe into the lower Nemaha Reservation. I addition to the $7500 the government paid for the land, the government was to provide the tribes 5 comfortable houses for each tribe, 200 acres of broken up ground, 200 acres of fenced common ground, provide a farmer, blacksmith, teacher, interpreter, provide agricultural implements and furnish livestock.
On 28 Mar 1837, President Martin VanBuren declared the lands in this purchase as part of the State of Missouri.