You would only know of such by family records.
For information I enclose an interesting note.
There is an ongoing project identifying soldiers buried in Oakwood. I would suggest you occasionally contact them as to their latest finds. I have lost my contact with the group, but this site might help: http://www.scvva.org/Oakwood/index.html
George Martin
08 22 1862 [Friday]
Appearing in the Athens [Tenn.] Post of this date:
Exhumation of Corpses.
Our attention has been called to the fact, that a number of instances, the remains of deceased soldiers killed in the recent battles, or the victums of disease, have been disinterred for transportation to their late homes, at remote distances from Richmond. When a metalic burial case can be obtained, this transporation may be e îffected; but otherwise, the expenditure for a wooden coffin, with sawdust or other packing, is just so much money thrown away, if we are correctly informed. We learn that it is rarely the case a corpse forwarded in this way reaches its destination. The rapididty of decomposition impels the railroad authorities to remove the corpse from the train, for re-interment, and thus the anxiety of relatives and friends to secure the remains for burial is defeated, and the heavy expense incurred in providing the coffin, etc., rendered unavailing. The removal of corpses should be deferred until the return of cold weather. - Richmond Whig.