That’s not true. Tribes did indeed move around, take, and enslave. The large civilizations acted as imperial masters, and not the nice kind.
I am Ani-Yun-Wiya....I am of the Bird Clan, Eastern nation...
My tribe was on the SAME lands for thousands of years and moved nowhere until Andrew Jackson and the US government betrayed my ancestors...
Now, I am also an extremely proud American and served two combat tours in Vietnam for my country...I justify our action in Vietnam by the simple fact that the US government signed over 1200 treaties with native tribes and never fully uphel any....In 1953, the US government signed the SEATO Pact (treaty) with South Vietnam and finally upheld a treaty....