Where there was support for Chemical Warfare was in V Amphibious Corps and X U.S. Army. Colonel George F. Unmacht (US Army) became commander of the Army's Chemical Warfare Service, Pacific Ocean Area in 1943. Along with that he was the Hawaii Territorial Coordinator for Civilian Gas Defense and Joint service Pacific theater chief chemical warfare officer under Adm. Nimitz. Under his leadership the research, development, and production of flamethrowing tanks and napalm took place at Schofield Barracks. His crews of Seabees produced more flamethrowing tanks than commercial production in the States. The Army and Marine Corps felt the tanks saved many American troops on Iwo Jima and Okinawa. The Marines felt they were the best weapon they had in the taking of Iwo Jima.