Hi Jerome,
Charles served in Company A 24th Regiment USCT. His Pension Application card is on Ancestry and also shows that his wife applied for a widow's pension after he died. If you can get the pension file, its worth its weight in genealogy gold! I hired a researcher to copy one for me and it was well worth it for the info I received. Charles' service record is on Fold 3. Check your local library to see if they allow free access--mine does. If you need me to, I can download it for you. Message me to my inbox. Good luck in your research!