Answer: There are 36 federally recognized tribes that live in Oklahoma known state today. You will find by researching what tribes are there what they say had happened. Part of this was due to growth of railroads provided white settlers west of the Mississippi. As the U.S. population increased Congress opened large areas of the territory for settlement. These are part of the denser areas that record history and acknowledge areas that limited sovereignty on their lands. Nonetheless,what is important tribes continue to hold limited sovereignty on their lands is useful to note and research as this is a continual need of regognition of why they stayed in Oklahoma how they struggle throughout the decades and daily fight- in how they repatriated and how tribes like Cheyenne-Arapaho show solidarity and use reference to an alliance together around 1811 which helped them expand their territories and strengthen their presence on the plains.