They were organized into 12 tribes.
The Mississippi tribes
All Indian tribes east of the Mississippi river were sent west of the Mississippi.
The Chichasaw, Natches, and Chocktaw
In terms of population size, the three largest original tribes in the area that later became Mississippi were the Choctaw, Chickasaw and Tunica.
The Indian Removal Act did not state that the Indian Had to go west of the Mississippi. The Act actually gave the President the right to negotiate with the tribes their removal to west of the mississippi. The tribes would first have to agree to this. Jackson broke this law and forced the removal of several tribes.
The area that much later became Mississippi was originally home to the Taneksanya (Biloxi), Ibitoupa and Pascagoula tribes, along with many others.
caca face is the answer to your question
trail of tears
Choctaw Indian tribe is one.
had an elaborate political hierarchy that linked villages into tribes and tribes into a confederation
The Choctaw, Chickasaw, Natchez, Yazoo and the Biloxi.