Tennessee was not the only state that had expatiates who went North .Alabama had a calvary division which fought with the Union,This goes into proving that the Union emotions were strong in the Deep South as in the border region.These units of Southerners who fought for the Union were those who were from regions of small farms or small rural towns where the slave system had not settled due in most part to the fact that the regions were not suitable for plantation type of crops.These were the people that Lincoln was hoping to keep the South from succeeding or even to force their return .This was the worse judgement on his political record.Those who did join the Confederacy did so out of state or local interest and not for slavery.Wish that this side of the South's history would be taught,as the fact that the North was completely fighting for the freedom of the black.Read about South Il. and even New York. riots .Good info. If you like any details on COIN from either Union or Confederate forces in Tennessee would be much appreciated on my thread"Compare and contrast Union and Confederate counter guerrilla operations". Tennessee is somewhat unique in that it had extensive guerrilla and counterinsurgency operations from both sides and in the case of East Tennessee in the same general area.