I predict a long and protracted struggle.
Nah, this was all settled in the movie Gettysburgh. The dialogue between Lieutenant Thomas D. Chamberlain and the Confederate prisoner explained everybody's motivations. It was about slavery. And preserving the Union. And state's rats (rights). See? Everybody's right. No struggle.
Lieutenant Thomas D. Chamberlain:
I don't mean no disrespect to you fighting men, but sometimes I can't help but figure... why you fightin' this war?
Confederate prisoner: Why are you?
Lieutenant Thomas D. Chamberlain: To free the slaves, of course. And preserve the Union.
Confederate prisoner: I don't know about other folk, but I ain't fighting for no darkies one way or the other. I'm fightin' for my rights. All of us here, that's what we're fighting for. [pronounces it 'rats']