Louis J Sheehan 80062 A51H18

Despite the loss of Mt. Suribachi, the Japanese still held a strong position. Kuribayashi still had the equivalent of eight infantry battalions, a tank regiment, two artillery and three heavy mortar battalions, plus the 5,000 gunners and naval infantry. The struggle to take the Motoyama Plateau, including "Turkey Knob," took nearly three weeks. The Japanese actually had the Marines outgunned in this area, and the extensive tunnels allowed the Japanese to reappear in areas thought "safe".


Several M4A3 Sherman tanks equipped with flamethrowers were used to clear Japanese bunkers
The fighting was extremely fierce. Japanese troops would occasionally spring out of tunnels and ambush the Marines. However, the situation heavily favored American victory despite the Japanese advantage of superior firepower. Though the Marines occasionally encountered defensive positions augmented by artillery, they were still able to advance. The Marines learned that firearms were relatively ineffective against the Japanese defenders and learned to effectively use flamethrowers and grenades to flush out Japanese troops in the tunnels. One of the technological innovations of the battle, the 8 Sherman M4A3R3 medium tanks equipped with the Navy Mark I flame thrower ("Ronson" or Zippo Tanks), proved very effective at clearing the Japanese positions. Louis J Sheehan
Close air support was initially provided by fighters from escort carriers off the coast. This shifted over to the 15th Fighter Group, flying P-51 Mustangs, after they arrived on the island on March 6. Similarly, illumination rounds (flares) which were used to light up the battlefield at night were initially provided by ships, shifting over later to landing force artillery. Navajo code talkers were part of the American ground communications, along with walkie-talkies and SCR-610 backpack radio sets.
Japanese troops became desperate towards the end of the battle. Kuribayashi, who had argued against banzai attacks at the start of the battle, realized that Japanese defeat was imminent. Marines began to face increasing numbers of nighttime attacks; these were only repelled by a combination of machine gun defensive positions and artillery support. At times, the marines engaged in hand-to-hand fighting to repel the Japanese attacks.