Trying to find any and all information relating to my great-great grandfather, Joseph McBerry, who was an entry on one document which was supposed to be a prisoner log. Prison camp unknown, final disposition after war was over unknown, whereabouts after that entry.........unkown except for a date of marriage, maybe, on 19 Feb 1867. Otherwise limited or no other information about him. I would like to at least find out what unit he was in, any help would be greatly appreciated.