Here is a link to a web site with information on soldier's that fought in the war or were on duty.
http://www.youngsanders.org/youngsanderssoldierscommands.html

Please note the basis for this listing, Booth's, is not 100 percent right. There are some errors. If the soldier was in Co A, 21st La, chances are he is from Orleans Parish, as that is where the company appears to be initially formed.

JIM T