V Amphibious Corps chose beaches abutted by coral embankments up to 15 feet. The Japanese thought the embankments made the beaches unsuitable for a landing. The CB engineers constructed detachable ramps mounted on LVTs to make such an assault possible. Salvaging iron beams from the damaged sugar factory on Saipan they fabricated 10 assault vehicles. Their commander, General Harry Schmidt, was skeptical and ordered a vehicle go up and down a ramp 100 times before approving their use in combat. The Tinian assault was a success. The defenders were quickly overwhelmed compromising the remainder of the defenses. The Seabees named their LVTs "doodlebugs". Peleliu From the Peleliu campaign on, a number of LVTs were fitted with a flamethrower for use against fortifications. The LVT was usually flanked by a pair of gun tanks for protection. A number of LVTs were converted to armored ambulances carrying a doctor and three corpsmen. LVTs were also employed as guide boats for tanks unloading onto submerged reefs. Leyte The largest use of LVTs was in the Leyte landing in October 1944, with nine US Army amtrac and two amtank battalions deployed by US Army 6th Army. These US Army LVTs were later used in other Philippine islands landings. 54 LVT(4) tracked amphibious assault vehicles of the 672nd Amphibian Tractor Battalion as part of the raiding force on 23 February 1945 forged across Laguna de Bay and crashed the gates during the liberation of Los Baños Internment Camp. They ferried the weakened liberated civilians back behind the lines during the contested withdrawal. The US Army 826th Amphibious Tractor Battalion provided Company A to land 43rd Division troops in first wave of this first American return to the Philippine Islands. Following the landing Company A "amphibs" were utilized to transport dead and wounded, carry supplies inland and provide support throughout the invasion and subsequent taking of Leyte. Company A vehicles brought troops for the second major landing on Leyte at Ormoc. The Battalion provided vehicles for the landing at Luzon as well and during the conquest of Luzon personnel were heavily involved in clean-up operations of Japanese troops left behind the advance. Iwo Jima The LVT-4 played a crucial role both as the assault vehicle to carry troops and as the chief logistical vehicle in the first days of Battle of Iwo Jima. Ashore, the LVTs were used to rescue wheeled vehicles that could not navigate