alternatehistory.com

So for my TL (see sig.) I am working on tinkeriing with Indian Policy a bit. I am looking for a plausible way to integrate the 5 Civilized Tribes (Cherokee, Choctaw, Seminole, Creek Etc) into the US. I was thinking making the Mississippi Territory a state for them, plausible? IF so why? What's it take to make this possible? What would it be called? Keep in mind this 1798-1802. thanks
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