The northwestern part of WV in which we live was most definitely Union territory, but my great-great-grandfathers and one great-great-great-grandfather, who lived farther south, joined the CSA (Va. 22nd Infantry, Va. 17th Cavalry, etc.).
Just recently I've found that one great-great-grandfather who was from the Charleston area, like the others, apparently signed a loyalty oath to the USA and was a captain with a Union militia in Kanawha County. Would like to find more info on him and the militia. I just love learning new things.