The Plains Indians roamed the plains because they had to. They used up all the resources in an area and then moved on.
They lived in hard times and that made for hard people.
When a Soldier went on campaign, there were still people at home to grow crops and raise livestock.
When an Indian Brave went on campaign, the tribe had one less hunter providing for them.
When a Soldier was killed, the folks at home still ate.
When an Indian Brave was killed, his family could starve.
Trick it out any way you want to, the Indian culture was never going to triumph.
Some of the tribes had transexual marriage before the liberal “yankees” thought of it too.