Speaking of Iwo Jima, we have to mention the location of Japan’s circular tunnel. Since the main force of the Japanese Navy had been lost in the Battle of Leyte Gulf, the Japanese Navy could no longer mobilize more mobile forces to participate in the Battle of Iwo Jima. Therefore, the defense task of the Battle of Iwo Jima was handed over to the Japanese ground forces. From a purely military perspective, the tactics used by the Japanese supreme commander Nakajima Kurojima to defend Iwo Jima are truly remarkable. The Battle of Iwo Jima? The only island battle in the Pacific battlefield where the number of U.S. casualties exceeded that of the Japanese. After a month of bloody battles, the U.S. Marine Corps finally captured Iwo Jima, but the U.S. soldiers also paid an extremely heavy price.
Li Linzhongdao divided the Japanese troops defending Iwo Jima into two parts: the navy defenders defending the beachhead and the army troops defending the Buchesan and Wonsan areas, and launched in-depth defense on the island. In order to avoid U.S. naval, air and naval firepower and naval gun attacks, the Japanese army built a circular underground fortification connected by tunnels and trenches at the foot of Zhebo Mountain. Through the continuous efforts of Tao Li Lin and Japanese officers and soldiers, a very powerful underground fortification was born on Iwo Jima. The fortifications built by the Japanese army were reinforced with volcanic ash and concrete, achieving an organic combination of natural caves and concrete bunkers. Each fortification could hide 300 to 400 Japanese troops.
Even the artillery positions were built as semi-underground artillery positions. Although this method of building positions sacrificed the shooting range, it effectively retained the Japanese army's few artillery support forces, allowing the Japanese artillery to Survive the heavy shelling from the US military. and artillery communication networks are effectively protected. In response to the U.S. military landing on Iwo Jima, the Japanese army also deployed three-dimensional defenses on Iwo Jima consisting of machine guns, mortars, mountain artillery and mines based on the combat characteristics of the U.S. military. All firearms shooting in Japan must undergo very strict calculations, so that the Japanese army defending Iwo Jima can "save themselves and destroy the enemy". Li Zhongdao also changed the Japanese army's traditional crazy charge tactics.