Thanks, Wayne! It was of great help.

With additional information that I have received, I now know that the only possibility for Civil War service out of the group that I asked about was Delona Patterson.

I have been able to narrow your list to two possibilities, and there is a high probability that one of these two is him.

D. H. Patterson, Co D 1st Reg't Al. Inf. In 1st Sgt., out Lieut.

D. R. Patterson, 1st Reg't Al. Inf. 2nd Lieut.

Now, if I can just find Delona's middle intitial...