^Ok, ^because ^reddit ^decided ^to ^eat ^my ^elaborations ^on ^this ^question ^and ^isn't ^letting ^me ^edit ^my ^OP, ^I'll ^post ^them ^here ^instead.

It's common to read about tribes being forced out of their homeland due to warfare or environmental factors, which then causes stresses on the people who's land they move into, but how exactly did this go about in practice?

From what I understand, tribes were never unified entities and more just a disparate collection of clans that all shared a common language / religion / ethnic bloodline, so how then did they organise themselves enough to migrate to new lands en masse?

And in practical terms, what was their migrations like? Did the entirety of the tribe up and leave, including women and children? Or did "tribal migrations" more closely resemble marching armies of men that then settled down and interbred with the local populations, creating a new tribal group?

This might be a better question for /r/AskAnthropology if you're looking for information on early human migrations.

Also, by the way, I also had some problem opening this post the first time I tried. Not sure what that's about.