I, too, am involved here as a descendent of Francis and reside in Everett, WA. I was in Elbert County just last October doing research on Brown, Maxwell and Gaines. Found some wonderful information and saw some tombstones and interesting country. I have found a bit on his war records:
I found that he entered as a private and was discharged as a private.
His Service record:
Enlisted as a private on Feb 28, 1862.
Enlisted in Company I, 15th Infantry Regiment Georgia on Feb 28, 1862.
Wounded on August 30, 1862 at 2nd Manassas, VA.
Wounded on July 2, 1863 at Gettysburg, PA.
W on April 9, 1865 at Appromattox Court House, VA.
Roster of Confederate Soldiers of Georgia 1861 - 1865. (GARosterC) Published in 1955-58 by Longineo & Porter.
I don't know what is meant by the "W" on April 9, 1865 at Appromattox
But sounds like the old boy was right in the middle of things.