Here is a bit of information on Major A.M. Rowland in Macon,Ga; "light duty men"- "unable to march far""but capable of manning the works"

http://books.google.com/books?id=y_uAV2-_PEAC&pg=PA341&dq=%22+Light+Duty+Men%221864&hl=en&ei=0fghTYmlLoa8lQfjto3TCw&sa=X&oi=book_result&ct=result&resnum=2&ved=0CCoQ6AEwAQ#v=onepage&q=%22Major%20a.m.%20rowland%22&f=false

Best Regards
John