Are we also assuming that Peru, New Grenada, and Brazil stayed unified as they had under Spanish and Portuguese rule? Though I guess it does come down a bit to if we consider the Braganza, Habsburg, and Bourbons spread around the Americas as continueing there legacies. I mean mean New Spain had what... seven kingdoms in it at first? Guatemala, Mexico, Yucatán, the New Kingdoms... you need to do something about the natives if you are to keep the area unified. A good amount of them went Catholic, but nationalism (not regional identity, that's only counts if you aren't in your own country) was for the tribes and their heirs that survived Castilian, Aztec(the others haven't forgotten how they as the ancestors of Mexica), Apache, etc despoliation son their own. Maybe have then unify against the invasions by the Italians in that farce of a war?