During the fierce artillery surprise attack, the Japanese infantry could not make an effective counterattack, and most of them were huddled near the tunnel entrance connected to the surface positions, waiting for the Anti-Japanese United Infantry to rush forward.

The Japanese artillery made a limited response. Two 150 heavy artillery used as fortress cannons were quietly pushed to the tunnel entrance along a short track, aiming at the Anti-Japanese Artillery Group several kilometers away to launch an attack.

The Anti-Japanese United Artillery Regiment soon suffered casualties. When the third mountain cannon was blown into parts by the Japanese, the nearby artillery observers finally caught the enemy's gunfire position. In the brutal and high-pitched voice of the regiment commander, the artillery that could hit the enemy's heavy artillery position quickly adjusted its direction and angle, and fired the return shells without saying a word.

"Damn it! Hurry up! Kill that bastard!"

The raindrop-like shells submerged the Japanese heavy artillery in the large smoke of gunpowder.

"Captain 1st Battalion." The commander of the cannon shouted at the top of his lungs, "The cannon is bayonet!"

The first battalion commander understood this term, and had done it a lot before. Whenever the regiment commander exclaimed, he would shout that the cannon was bayonet. The first battalion was the unscrupulous executor. Soon, two tractors dragged two mountain cannons backwards and rushed towards the foot of the mountain.

The advantage of close shooting is beyond words. The regiment commander asked these two cannons to approach the eyes of the Japanese heavy guns, and used the Japanese cannon's downward angle to prevent him from hitting his own defects, so he watched the enemy tightly to prevent him from raging again.

The artillery of the first artillery battalion was still moving, and several tanks that had already arrived at the foot of the mountain had gathered at the firing position, aimed at the entrance of the tunnel, fired the shells at the target, and sealed the location of the enemy's heavy artillery. The enemy's heavy artillery was silent.

Under the powerful anti-Japanese artillery fire, Beishan and Aobao Mountain were filled with thick smoke and fire, and countless craters were numerous. The mountain soil was fluffy and soft by shells, and the heat was gushing. One trenches after another, and the castles were destroyed.

The artillery no longer saw the target worth attacking, and the sound of artillery gradually faded.

"Are you still fighting?" Li Fengshan raised his telescope and looked at the fortress in the distance. He could no longer see the Japanese squirming figure in his camera. He asked Ma Qian'an.

Ma Qian and Anliu thought and replied: "Fight! There must be still remaining firepower points and unexposed castles. If you destroy one more castle, we will die a lot of people. I don't feel sorry for the shells."

With Ma Qian'an's new order, another base shell hit the mountain.

The sound of artillery stopped, and the commandos hidden in the anti-tank trench were ordered to attack upwards and prepare to occupy all surface positions. Many people believed that under such powerful artillery fire, even ants had no place to survive. However, the soldiers still underestimated the Japanese's tenacity. As soon as the anti-Japanese artillery fire stopped, hundreds of Japanese appeared as if they were coming out from the ground, howling and charging downward.

Some of the desperate people were tied with **, and they rolled into the commando of the Anti-Japanese United Army while shooting, and then ignited **.

"Arson for artillery fire!" Ma Qian'an gritted his teeth and ordered fiercely.

Some of the Japanese were driven back to the cave by artillery fire, and some of the Japanese who had broken into the Anti-Japanese United Army team fought with the Anti-Japanese United Army soldiers for a while and were all killed.

"Feel the attack lure the Japanese into battle, and artillery fire covers the fire!"

Ma Qian'an was closely watching the situation on the battlefield. The battlefield changed rapidly, and his orders also changed.

Several feint attacks led the Japanese to appear, and several artillery fire covered the mountains, causing the Japanese to corpses to spread. The Japanese gradually lost their vitality and courage. No matter how the Anti-Japanese Allied Forces feint attacked and lured them, they would never get out of the mouse hole again.

Infantry, artillery and tanks cooperated with each other. The Anti-Japanese United Army repelled many counter-charges in just one hour and occupied the surface positions of Beishan and Aobao Mountain. The commando teams scattered around to find and control the entrances of the tunnels. There were no projects to attack the tunnels in the commando's mission. The commander before the war had conveyed and seriously reminded him not to risk attacking the enemy's tunnels and wait for the "professional troops" to take over.

Underground is a large maze, with underground fortifications covering tens of thousands of square meters, and the length of the passage with full connections is 10,000 meters. Thousands of defenders will suffer major casualties if they are reckless in attacks.

Zhang Xiaohua's team is a "professional force". When the commando occupied the surface position, dozens of groups divided by the special forces group rushed to two hills one after another.

Some soldiers surrounded these "professional troops" curiously, pointing at their equipment and whispering. Each group of these gopher digging rats was about 1,012 people, and the standard was equipped with a 90 rocket launcher, 16 cloud bombs, 2 armor-breaking bullets, one flashlight, 3 submachine guns, one semi-automatic rifles, one **** per person, two grenades per person, and one set of oxygen masks and oxygen tube tanks per person.

The Rockets and the Deputy Shooter are the heads and deputy team leaders. They have both memorized the underground fortification plan and are responsible for guiding the attack direction. The rest are either ammunition players or cover mission personnel.

In order to completely preserve all the materials and equipment in the underground fortifications, Ma Qian'an did not equip the special forces regiment with flamethrowers. Although the thing is also very powerful, it is also very powerful to burn things.

If the soldiers of the commando know the cadres and soldiers of the special forces regiment, they will find that most of the rockets are battalion companies and platoon-level cadres. In order to ensure strong command, these grassroots cadres have resolutely played the most dangerous roles.

Although the surface of the ground was repeatedly plowed by artillery fire and carefully searched by the Anti-Japanese Forces commandos, there were still some gaps connected to the tunnels. The Japanese no longer dared to shoot out through these gaps, but they could observe some situations outside. When these strange groups of the Special Forces Group gathered near the tunnel entrance that had been discovered, the Japanese in charge of the observation quickly reported the new situation to Noda Tomi.

Noda Tomi has become calm, and the loss of the surface position is irreversible. He does not intend to regain the surface when the Anti-Japanese United Army is in full swing. Now it seems that it will not be taken away. Don’t sacrifice the power of the defenders in vain.

He was confident of defending this huge underground palace. He was familiar with every passage here, every lounge and battle position here, and he also made sufficient preparations to set up barriers and temporary positions on key passages. Even if the Anti-Japanese Allied Forces entered the underground along the surface passage, he still had the spare energy to fight the enemy to a desperate battle.

"What? The Anti-Japanese Allied Forces are actually preparing to use poison gas bombs?" After hearing the report, Noda Tomizu "judged" that those Anti-Japanese Allied Forces carrying oxygen masks are preparing to use poison gas. They were furious: "The despicable zhina people actually violated international conventions and used poison gas blatantly, shameless! Shameless! I must expose the bad behavior of the anti-bandits and accuse them!"

Noda's energy is still alive, but he is not afraid of poison gas bombs. The fortress contains a large number of gas masks and some poison gas bombs. However, under the storm of the Anti-Japanese Allied Forces, Noda didn't even have time to remember that he had poison gas bombs. Now the use effect is not great. The Anti-Japanese Allied Forces also have gas masks, so let's think about it.

Noda was filled with righteous indignation for a while. Under the urgent and nervous reminder of the staff, he finally remembered the serious matter and urged his subordinates to issue orders: "Quick! Open the warehouse immediately and distribute gas masks."

On the Anti-Japanese United Nations, the combat mission to capture the underground fortifications of the Japanese and eliminate the remaining enemies was issued. With the first cloud explosion bomb exploded at the entrance of the tunnel, the attack officially began.

The officers in each team knew the data of this ammunition in their chest. Each explosion formed an overpressure, temperature and fragmentation that was as powerful as heavy artillery. In order to prevent the narrow passages, they used this "big killer" carefully and tried to pick up the wide places underground fortifications to be deployed. The users did not value the lethality of this ammunition, they relied on the characteristics of the burning oxygen of this ammunition. They rarely targeted the places where the Japanese appeared when firing, and did not care whether they could hit the hiding place where the Japanese soldiers were. They only touched thirty or forty meters, and picked a seemingly spacious and sturdy place and went there casually.

Each explosion of a cloud bomb will consume oxygen within a range of hundreds of cubic meters nearby. More and more Japanese soldiers who are hiding well are not attacked by any bullets, but they lie on the ground and roll, opening their mouths desperately to breathe the air without any oxygen until they scratch their throats and die. Many people die without even seeing their opponents.

The uncommon but dull explosion gradually approached Noda Tomi's command room. Noda had no idea how the opponent's attack speed was so fast. He only heard the other party's occasional submachine gunshots. The gunshots of his own resistance were messy and thin, completely unlike a unit of more than 2,000 people fighting. Most of the calls they made were unanswered. The subordinate officers who answered occasionally were also defending officers in the area where they had not been attacked. They also did not understand what was happening ahead and could not provide the truth.

Noda finally couldn't sit still, so he threw down his phone and map, took the staff and the guards out of the command room and walked to the nearby place where the explosion sounded.

After walking for a while and entering a hall, I finally met several soldiers running desperately in their direction. Under the dim light, Noda saw that the soldiers' faces were filled with panic and despair.

"Your Excellency Colonel!" A messenger who had just been sent out shouted wildly to Noda: "Run! The enemy used the devil bullet, and it was hell in front, without any oxygen!"

"Baga!" Noda raised his hand and shot him, knocking the messenger who "disrupted the morale of the army" to the ground, without oxygen. How is this possible? It must be that the poison gas of the Anti-Japanese United Army was too powerful, which led to this situation.

Noda hurriedly put on a gas mask. When he was in a hurry, he suddenly felt a flash of light in front of him. Looking up, he saw a ball of flame flying from the other end of the passage towards him.


Chapter completed!