Tennessee was split between pro Confederate West Tn. and Pro Union East Tn. I think a lot of the “Pro Union” folks were just ambivalent mountain people who didn’t want part of the war in any manner.
There was some ambivalence to begin with, but the more the mountain people saw of the Confederate misgovernment up close, the more strongly they held to the Union. It was not ambivalence the produced the large number of East Tennesseans who volunteered to fight for the Union and it was not ambivalence that made the 1st and 2nd Congressional districts Republican strongholds after the war.