A booming explosion instantly swept through the charging commandos, powerful flames blazing, bouncing dirt and sand rolling at the feet of the brethren's legs.

But the brothers quickly crouched down, covered their bodies as much as possible with sandbags, and bowed their heads slightly. After the devil grenade exploded, slowly get up and move slowly forward.

Two or three brothers were injured by the shrapnel from the explosion, but their lives were not in danger, and they continued to drag their injured bodies and continue to push forward.

Seeing that Wang Si's attack could not be stopped, the devils continued to strafe the assault team in horror, but it seemed to have no other effect except for piercing a few holes in the sandbags.

The brothers pushed all the way, and when they reached the 40-meter range, they quickly built up the sandbags in their hands one by one, forming a simple protective wall.

The brothers all hid behind the protective wall, and used the flower machine in their hands to cover the bomb throwing team, and used the fire of the flower machine to suppress Huizi's heavy machine gun, hoping to buy time for the bomb throwing team.

The bomb throwing squad did not hesitate, and immediately rushed over, concentrated all the remaining grenades of the commando, and threw them at the four 92 heavy machine guns in different positions of the devils.

The grenades were like small steel cannons in the hands of Anban, and they smashed directly on the target to be blown up, followed by a booming explosion.

The violent explosion overturned the devil's heavy machine gun, killing the devil's machine gunner on the spot, and the four machine gun positions were instantly burned by the fire, and the heavy machine gun was also destroyed.

All the machine gunners of the devil lost their lives in the explosion of the grenade, and the first line of defense in front of Wang Si and them was successfully breached.

Because of the effective cover of the assault team, the four Type 92 heavy machine guns of the devils were extinguished, and the main force of the guard regiment quickly launched a charge, followed up the first line of defense, and the second line of defense of the devils was close at hand.

Wang Si asked the assault team to hold a line of defense, stabilize their position, and wait for an opportunity to rush up to seize the second line of defense of the devils, open the east gate, and attack the east gate of Jiangcheng.

But the head of the guard couldn't wait, and after seeing the first-line position captured, he couldn't wait to lead the team to attack the devil's second-line position and rush across the moat.

Just when the brothers rushed to the second line of defense of the devils, they were attacked by the devil's bunker, and the machine guns in the bunker passed through the firing port less than ten centimeters from the ground and fired at the charging team, and about 20 brothers of the guard regiment died heroically in the cold.

The remaining brethren quickly retreated, led by the head of the guard, and returned to the Devil's front line position they had occupied.

"Damn little devil, he actually prepared three dark castles for Lao Tzu in front!" The retreating guard commander immediately said, and it could be seen that he was gritting his teeth with anger at these little devils.

"What's going on?" Because of the chaos just now, and the top of those dark castles was close to the ground, almost all the devils were in the stratum, and Wang couldn't see the real situation at all.

Although the head of the guard was talking to himself about the dark castle, he couldn't say it clearly, and Wang Si didn't understand what was going on, so Wang Si had to ask in person.

"The little devils are so cunning, they actually dug a pit in the ground, and then made brackets and lids out of reinforced concrete, and the little devils hid in such a bunker, and strafed our charging brothers through the firing port, and the brothers suffered heavy casualties!" When the head of the guard heard the inquiry, he did not have any reservations about what he saw.

"You mean those bunkers are underground?" Hearing this, Wang Si immediately felt that things were not simple, it seemed that the little devil had done a good job of defending here, and had been preparing for a long time, otherwise there would definitely be such a strong and concealed defense.

"That's right, I've looked closely, and there are three of them firing at us, but I'm not sure if there's a bunker like this!" The head of the guard immediately said.

Obviously, he made them suffer a big loss because of the suddenness of these dark castles, and now he has palpitations when he thinks about it, he didn't expect that Yoshino, an old devil, would defend Jiangcheng so tightly, and hardly give them any chance.

"The devil's bunker is hidden underground, which makes it more difficult for us to blow it up!" Jiang Caidie said, it seems that the second line of defense of the devil is not so easy to break through.

"No matter how hard it is, we have to fight from here! Jiangcheng is right in front of our eyes, we can't just watch and do nothing! Wang Si immediately said.

They have no choice at all in this battle, they must fight this battle well and successfully break through the second line of defense of the devil in order to have a chance to take Jiangcheng and open the road to Wuhan.

"But now the devil's bunker is not a bunker on the ground, and the problem can be solved by relying on explosives packs!" Cui Yaolin said immediately after hearing Wang Si's words.

In the current situation, even if they send people to rush over and use explosives to blow up the bunker, I'm afraid it won't work, after all, the force level of the bunker underground is huge, even if they use more explosives, it will be difficult to achieve, not to mention that they don't have so many explosives.

"We can only get close to those bunkers, open the lid of the bunkers, and throw grenades directly into the bunkers, and fundamentally blow up the devils inside!" Wang Si thought about it carefully and felt that there was only one way to do it at the moment.

"But there are machine guns in the bunker, and it's not easy for us to get close!" The head of the guard immediately said that in his opinion, things were far from being as simple as they imagined.

They had tried to charge just now, but before the brothers could get close to the bunkers, they had already been repulsed, and the losses were still quite large.

Now I still rush again, I believe that the result will not be better than the previous one, except for increasing the number of casualties, there is no other effect at all.

"We can only use the same line of defense as we did when we captured the first line, using sandbags as cover and then charging forward. However, this time we are far away, and we have to reach the Bunker to be completed! Wang Si said with certainty.

He knew that the little devil's defense in front of him was very strong, and it was impossible to break through easily, and they had to find a way to deal with it. And judging from the devil's current defense, there may be more than three hidden castles found by the head of the guard.

It could be six, it could be nine, or even more, but no matter how many, all they had to do now was destroy those bunkers and seize the second-line positions.

"We can't carry a large explosive bag with us for this kind of operation, we can only use grenades!" Jiang Caidie agreed with Wang Si's statement, feeling that this was the only feasible way at present, but now it was time to consider what grenade number was.