Oklahoma is mostly all former and active reservations. Some are still very active.
https://famok.org/
This museum is very near downtown Oklahoma City. Very amazing place. They to have one small display that mentions the tribal wars, and slavery of other tribal members captured in battle.
The First Americans was a pure stone age peoples. They had no concept of metals until the white man came to trap animals and trade with metal pots and metal knives for pelts. And they looked at a metal knife and instantly knew it was far superior in every way to a stone knife. To have a metal cooking pot was a real wonder. Then to see the white man on horses learn a beast as large and powerful as a horse can become your transportation and work animal was a revolution in thinking and transformed their entire cultures.
None of that implies they were inferior or stupid, just that they never developed any technology. Europeans developed metal smelting and manufacture over 3,000 years ago. Not because they were smarter, but partly because they also developed writing, and a way to pass knowledge to future generations by reading and writing. The masses could not read, but the people that could were the ones in charge.