In addition to the eleven Southern states which actually voted in 1861 to secede and join the Confederacy, the Confederacy claimed sovereignty over Union states or territories of Kentucky, Missouri, Oklahoma, West Virginia, New Mexico and Arizona.
West Virginia is the state jeffersondem sooooooo cleverly thinks was admitted to the Union as a slave state.
In fact, Lincoln's 1862 condition for admitting WVA was that it must free its slaves the same way other Northern states did, gradually.
West Virginians agreed to Lincoln's condition in 1863 and voted to ratify the 13th Amendment abolishing slavery in early 1865, the seventh of 27 states to ratify at the time.
Of course, Jeffersondem knows all that, he just likes to pull our chain on it.
I never identified the state as West Virginia. And I'll tell you why: I didn't want to embarrass my many friends who like to believe the north was fighting to “free the slaves” while they were grabbing money with both hands and adding a slave state into the empire.
But I do admire the way you delicately explain things: “Yes, the north was pregnant. But it was only a little bit pregnant.”