The Little Arkansas Treaty was a set of treaties signed between the United States of America and the Kiowa, Comanche, Plains Apache, Southern Cheyenne, and Southern Arapaho at Little Arkansas River, Kansas in October 1865. On October 14 and 18, 1865 the United States and all of the major Plains Indians Tribes signed a treaty on the Little Arkansas River, which became known as the Little Arkansas Treaty. It is notable in that it lasted less than two years, the reservations it created for the Plains Indians were never created at all, and were reduced by 90% eighteen months later in the Medicine Lodge Treaty.
The full treaty can be found online.[1]