Various Sioux tribes were pushed west of the Mississippi around 1600-1700 by various wars that took place between natives at the time. It's probably the most we

Various Sioux tribes were pushed west of the Mississippi around 1600-1700 by various wars that took place between natives at the time. It's probably the most well-known pre-contact migration of Native American tribes (at least those that live in US/Canada; the Mexica migration into the Central Mexico Valley is probably even more well-known, as it's a very key part of their own histories).