I'm not convinced a balkanized US would even split along traditional state lines except in cases where the borders are rivers or mountains. The state borders are completely fictional and set up according to things like slave compromises or like treaties with France from 1740. They'd have no current geopolitical stakes.
The only one I could see being a problem is Louisiana, because their roads are noticably worse than every other state, so they'd be more difficult to annex
I'm not convinced a balkanized US would even split along traditional state lines except in cases where the borders are rivers or mountains. The state borders are completely fictional and set up according to things like slave compromises or like treaties with France from 1740. They'd have no current geopolitical stakes.
The only one I could see being a problem is Louisiana, because their roads are noticably worse than every other state, so they'd be more difficult to annex