Melvin --

That's the index to Mississippi Confederate service files. If you're interested in service files of the 15th Mississippi, those are found on M269, Compiled Service Records of Confederate Soldiers Who Served in Organizations From the State of Mississippi, reels 229-236.

If you're interested in a particular soldier, please mention his name and what you know about him. You can order military service files through the message board, which might be what you really want.