Wishing you the best in finding a marked CSA grave. True chances on that are between slim and none.
But my best advice is to look anyway.
I have never found but one and it was because he had died in a Union hospital and someone in the area
had the kindness to put his name on the grave. That one is located in Savannah, Georgia and while it is
marked, the last name is misspelled.
Good luck.
Linda