Just curious, what ares do you guys think would be eyed with hunger by the Confederates? Nicuragua? the Danish Virgin Islands? Anything a filibuster had made a go for?
Keeping a hold of everything they've got would be first on their list of priorities before they even consider expanding. And that will be a difficult enough task it will take most of their time and effort.
They'd want a link to the pacific under their control as soon as they could get it. So they might look to Mexico for that link. OR, they could try for something in Central America. Perhaps a Confederate Panama/Nicaragua canal?