From there it came to the attention of the United States. V Amphibious Corps placed an order for 20 units followed by another for 10. These were given to Col. Unmacht of the Chemical Warfare Service CENPAC, at Schofield Barracks, Territory Hawaii. Seabees under his command installed the Ronson units in 24 M3 Stuarts for the Battle of Saipan. Those tanks were nicknamed "Satans". Col Unmachts men used the Ronson to develop USMC M4 Shermans with Navy Mark 1 flamethrowers. These tanks were used in the Battle of Iwo Jima. Col Unmacht's Flamethrower Group would also install Ronsons in the first generation coaxial flame tanks designated CWS-POA-H5 (Chemical Warfare Service-Pacific Ocean Area-Hawaii).