Is that for US or UK troops? If US = Smoke Generator Smoke Generation http://www.history.army.mil/html/forcestruc/lineages/branches/chem/354cmco.htm 179th Chemical Smoke Generator Company http://www.cgsc.edu/CARL/nafziger/943UKAA.PDF 168th Chemical Company (Smoke Generation) 172nd Chemical Company (Smoke Generation) 179th Chemical Company (Smoke Generation)