Unfortunately, the American Indians did not have writing, and so the histories of the tribes is pretty murky.

For example, most of what is known about the Commanches comes from letters and diaries of white people who were in contact with them, or were enslaved by them.

See "Empire of the Summer Moon" by Gwynne.

https://www.amazon.com/Empire-Summer-Moon-Comanches-Powerful...

It's a fantastic account, and I'm amazed nobody has made an epic miniseries about it.