Why was Mississippi land called Indian country?

Mississippi land was referred to as "Indian country" primarily because it was inhabited and controlled by various Native American tribes before European settlers arrived. The term signified areas where Indigenous peoples lived, hunted, and governed themselves, often in contrast to territories claimed by European settlers. The U.S. government's policies in the 19th century, which included forced removals and treaties, further defined these regions as "Indian country" during periods of conflict and displacement.