Wow, I'm surprised to see that people are responding to this again after so long. I'll admit that I haven't worked on this idea in a good while, with school and finals being my focus as of late. But it is very encouraging to see that people may really be interested in this idea. As for the capital, I was thinking potentially Warwick RI as @Arcavius said. As to the size of the northern secession, I'm not exactly sure. I didn't want it to include the entire north as I can't see states like Illinois and Indiana seceding against slavery. Sure, they were free states, but unless the southern union was especially brutal, I can't see it happening. As to the name, I was thinking of calling it the New England Confederacy, the NEC. This is because it would originate from there and then move on to include more states. I did have a president in mind for the NEC, but I can't remember who it was. I'll have to look at some of my old notes if you guys are really curious. Anyway, thanks for the new responses!