 CWS designated M4s with "CWS-POA-H" for "Chemical Warfare Service Pacific Ocean Area, Hawaii plus a flamethrower number The Marines had previously deployed large Navy Flamethrowers mounted on LVT-4 AMTRACs at Peleliu.Late in the war, both services operated LVT-4 & -5 amphibious Flametanks in limited numbers.Both the Army and the Marines still used their infantry-portable systems, despite the arrival of adapted Sherman tanks with the Ronson system (cf.