Lusitania
Donor
I would of thought the natives and Spanish would of been able to supply the natives and they be a bigger and stronger adversary.I doubt natives will voluntarily give up their homeland. they're going to agitate for their own nation-state. TTL, the south USA is in disarray, so OTL cohesion of action is not applicable. I suppose it is possible that, having lost NE, USA will turn its expansionist eyes to Alabama/Mississippi, but with the disarray, that'll take time. TTL, Mishigama will be feeding them weapons. Mishigama, unlike OTL Oklahoma, is chock full of natives, so they're not going to readily welcome newcomers. They'll help the southern tribes resist white encroachment. What's in it for Mishigama to make this treaty, which is completely unnecessary (Mishigama doesn't need it to let natives cross the border, US doesn't need it to let the natives travel there unimpeded)?
I'll go with it, as it's not my TL, but, IMO, it is off the mark to see a voluntary exodus.
That US had not seized Florida which is still Spanish makes one think they don’t have the power projection that iotl had.