I've been seeing this a lot in recent maps, that somehow a Confederate state annexes territories such as Ohio and Kansas. I understand that if Bleeding Kansas had gone a particular way, it could have had a CSA backed govenour secede from the Union, and after a Confederate victory, become part of the confederacy, but I do not understand how the Confederates would be able to take Ohio; it would have split the Union in half permanently, and would probably have caused a later secessionist movement in the West from an already weakened Union, making such a secession unacceptable.
How would a Confederate Ohio be possible?