Elfwine, I am now writing the American Civil War section in detail. I chose to not have a glorious Confederate storming of the US Capitol, as I read a thread on this very forum that made me realize that the CSA had as much chances of succeeding as Germany did with Sealion.
Yay.
I think a Confederate capture of Washington might be possible (more so than Sealion), but not in any circumstances that ever came up.
But the idea of a sweeping Confederate win is still interesting, so looking forward to seeing this.