During the bombing of the Japanese mainland, the Fourth Theater also launched an offensive operation against Iwo Jima.

The direct landing operation was still the Second Marine Corps, under the cover of a large fleet, near Iwo Jima.

Satellites in the sky, uninterrupted transmission of various clear photos of Iwo Jima, early warning aircraft and high-definition reconnaissance aircraft, also from time to time to take high-definition pictures of Iwo Jima back.

The results of the intensive investigation showed that the Japanese army on the island of sulfur had already been ready to face the enemy's landing operations.

The island is full of dark bunkers, and the Japanese have dug a large number of tunnels and bunkers on the island, hollowed out the mountains, or dug caves, and then sealed the mouth of the cave, forming a secret fire point.

The situation on Iwo Jima, even the Red Guard Corps, felt a lot of pressure, which may be the most casualty landing battle since the Japanese war.

Although the Japanese air base on Iwo Jima at this moment has no aircraft to take off and has lost its sea control, only the army on the island can use it.

Iwo Jima's offensive plan has long been completed, and the Red Guard Corps, which has sea power and air power, is alert to the movement of the Japanese joint fleet, and is also actively preparing to land on Iwo Jima.

In the past three months, Japan has further strengthened the defense of Iwo Jima, and tried its best to send the last 6,000 troops to Iwo Jima, and set up a 109th division to defend Iwo Jima, and was headed by the famous Japanese general, Soylin Zhongdao.

In order to protect this last barrier to the mainland, the Japanese also equipped the island with a large number of 120 mm and 155 mm shore defense guns, large-caliber anti-aircraft guns and anti-aircraft guns.

Originally, Japan also wanted to increase the strength of an air force on the island, but unfortunately, these fighters had not yet reached Iwo Jima and were sunk by the submarine of the Red Guard Corps.

By the time the troops in the Fourth Theater were set in, the Japanese army on Iwo Jima had 18,000 men, and the navy had more than 7,000 people on the island, with a total strength of 25,000, no aircraft, and no naval vessels.

Su Lin Zhongdao, the supreme commander of the island, is also an excellent professional soldier, once served as the commander of the imperial forbidden guard, after taking office on Iwo Jima, realized that there is no air and sea power, the beach defense battle is meaningless.

However, not all the troops on the island were controlled by Soulin Zhongdao, and the island's naval garrivalry insisted that they must defend themselves in the probe and annihilate the enemy during landing.

In this regard, Soulin Zhongdao can only make a compromise decision, mainly in-depth defense, probe defense as a supplement, the coast guard team along the beach to build permanent defense and solid fire support points, forward defense.

The army relies on strong fortifications and in-depth defenses with the favorable terrain of Mount Yue and Yuanshan on the island of sulfur.

Sourm was determined to turn Iwo Jima into a fortified fortress at sea, because there was a large amount of cement left on the island, which was originally intended to be transferred to the Mariana Islands, and the result was naturally not used.

For three months, all the cement was used, and the island’s defenses were as fortified as possible.

At the same time, the army to the mountain as the core position, to the two airports as the main defense area, in the most suitable landing area, the establishment of fortress fire, combined with cement closed underground tunnels, mixed soil and caves combined, with traffic trenches connected to each other.

In order to be able to resist artillery fire from the sea, the artillery positions of the Japanese army on the island were all built in a semi-underground structure, and although the attacking shooting boundary was also sacrificed, the probability of survival of the artillery was greatly improved.

The island's artillery and communication networks have all been protected, and the mountain has been almost completely hollowed out, building a large number of pits, and various cross-sectional tunnels and fortifications, stacked up and down, reaching as much as 90%.

And in response to the landing combat characteristics of the Red Guard Corps, at the forefront of the beach, a large number of anti-tank mines, artillery shelling guns and anti-tank guns hidden inside the cement bunkers, combined with machine gun fire, constitute a dense fire defense network.

These defensive fire configurations and shooting targets are accurately calculated to conceal themselves and to kill the enemy to the maximum extent.

And on Iwo Jima, the real attack problem is not the beach landing operation, but the joint defense system between the two high mountains on the island.

In the Wonshan area, the Japanese built pits for 28 kilometers, and were connected to the defensive pit road of Mount Shixing.

In other words, the main defense forces of the Japanese army are able to move freely between the two mountains, flexibly distribute forces, and can also flexibly withdraw and counterattack.

This defensive configuration of Soulin Zhongdao, which changed the Japanese army's death-fighting tactics, strictly stipulated the distance of soldiers' shooting, mobile defense, subdued tactics, and strictly required all soldiers to prohibit suicide charge, and called every soldier to kill ten enemies.

The painstaking management of Soulin did indeed build a terrible maritime fortress on Iwo Jima.

Historically, the United States also faced the most brutal bloody battle on Iwo Jima, and the opponent of the US military at that time was also Su Lin Zhongdao.

However, this time, Su Lin Zhongdao is not facing the US military, nor is it the former Red Police Force.

This time, the opponent that Japan is facing is the new Red Guard Corps, a force that has fully achieved information warfare.

Near the landing, the reconnaissance aircraft personally inspected the Longyun of Iwo Jima, and after seeing the situation on Iwo Jima, they could not help but frown.

In this landing operation, Longyun served as the commander-in-chief, and the situation on Iwo Jima was more difficult than the history of the US military.

At this time, on the island of Iwo Jima, there were no signs of Japanese activity, and there was bare soil and weeds everywhere, and the Japanese army was completely concealed and disguised, as if this was an empty island without an empty space.

The two airports were also very quiet, no defensive positions were visible, not even a mortar.

The Japanese did not have time to set false targets, and the island became very empty.

At the same time, the island's Soleukong also felt the coming of the war, and the air reconnaissance made him realize that the enemy was about to land on Iwo Jima.

Sour Lin Zhongdao issued orders for all soldiers to prepare for battle, and from now on, by the standard after the enemy landed, all soldiers were strictly required, and it was forbidden to appear outside the fortifications at will.

This order makes Iwo Jima a ghostly quiet, quiet and uncomfortable.

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