Very interesting history. Thank you! My great X2 uncle was also young, a private, so I imagine he was nervous at Stone's River. I knew that this regiment was at that battle, but I did not have any details. Here is something you will find interesting, I think, about the 24th.:

From a statement I found in the Archives in Wash, D.C.,
written by John N. Kiefer, the Captain of Co. H. of the 24th, for a pension application by Frank Ellenbecker's mother...
"Frank Ellenbecker, a private of said COmpany H, that on the 17th day of May 1864, said Co. H was engaged in a fight with the rear guard of the enemy, that Frank Ellenbecker was in said fight which took place at Pleasant Hill, Ga, that said Co. H, then and there being in a very...and having exhausted all their ammunition was ordered by this affiant at night, to fall back and retreat, that Frank E then and there said, he had seen a rebel fall near him and would see it he had no ammunition, that meanwhile the Company retreated, and this affiant not finding said Frank E the next morning went forward to the place where he had seen said Frank E last on the night before, and that he then and there found him, a true and noble soldier laying dead..."
Pleasant Hill is by Adairsville, I believe. I guess this action was part of the Atlanta campaign, with Johnston retreating and fighting as he went.
His mother did receive the pension. Her other son was wounded at Petersburg. He served with the 38th Wisconsin.