Greg/Ken

Here’s what I find:

The 1st Battalion Georgia Infantry, organized April, 1861, morphed into the 36th Georgia ca October, 1861. The designation of the 36th (Villepigue’s) Regiment Georgia Infantry was changed to the 1st Regiment Confederate Infantry (also known as the 1st Confederate Regiment Georgia Volunteers) by S. O. No. 25, A. and I. G. O. dated January 31, 1862.

M258: Compiled Service Records of Confederate Soldiers Who Served in Organizations Raised Directly by the Confederate Government.

………………………..

D. F. Mercer

Residence was not listed;
Enlisted on 4/14/1864 as a Private.
On 4/14/1864 he mustered into "E" Co. CS 1st Infantry
(date and method of discharge not given)
(No further record)

Sources used by Historical Data Systems, Inc.:
- Roster of Confederate Soldiers of Georgia 1861-1865

…

Mercer enlisted April 14, 1864. I suspect he may have been a 17 year old Conscript.

Engagements in which his regiment were involved can be seen at:

http://www.civilwardata.com/active/hdsquery.dll?RegimentCasualty?441&C&1&35&20