Yan Feng and Guan Hong were both veterans during the period of the General Administration. They went from ordinary soldiers to the position of military commanders step by step with their military achievements. They can be said to participate in all major battles established by the General Administration. Although they are still young, they are also veterans of a hundred battles. They understand that they can only take extraordinary measures to seize the city in a limited time when the troops are equal.

On the day of the agreement, General Yan Feng's artillery brigade and the artillery regiments of each division were all concentratedly used, and were arranged on the hills and high ground outside the northern city according to the range and near. The siege troops were on standby in front of the city, and the assault troops were only more than 200 steps away from the city wall. They would quickly climb the city when they had the opportunity, or break in from the breakthrough point to open the path.

On the high platform outside the city, Yan Feng looked at the city with a telescope. It was late at night, and torches were inserted on the top of the city, and lamps were hung on the exterior walls, making the city above and below the city clearly visible. There were only a few places in the city with sparse lights, and at first glance, the dark area was visible, and the buildings were hazy.

"Fire the cannon!" The sound of drums in the city was even more intense. It was already midnight, and Yan Feng waved his hand and shouted.

‘Boom, boom, boom…’ With the order issued, three red lights rose from the high pole, and the gun positions that had been loaded and on standby immediately went to the pre-order government offices in the city, the Zhendong Prince's Mansion in the northeast of the city, and the Zhenjun Commanding Office in the northwest of the city.

The rocket launcher with the farthest range has the fastest firing speed, and it flew to the government office with a heart-wrenching scream. The architectural layout here is still the front yamen and the back yamen. The yamen is located in the north and south, with civil and military personnel on the left, military personnel on the left, and the front yamen and the back yamen are built around it. Therefore, the government office is not only the administrative center of Yidu Fu Road, but also the place where officials' residences and materials are gathered.

Zhendong Prince's Mansion is the mansion of Hedai, which is the highest-ranking person in the city and the highest military leader of the defenders. Therefore, this place is his private residence and the command center of the defenders in the city; and the command department of Zhenjun is the yamen of the guards and the military camp of the Zhenjun, with a large number of soldiers stationed.

Therefore, first attacking these targets can not only annihilate the leaders of Yidu Prefecture, paralyze the administrative and military command system, weaken the power of the defenders, trigger chaos in the city, and destroy the materials they rely on to defend the city, and also destroy the morale of the defenders and lose their fighting spirit.

The rocket launcher, which has always been called the most unreliable but scariest by the Song army, has the characteristics of great power and fast firing speed. As the first round of strike firepower, it dragged scarlet flames to the city, illuminating the gloomy sky without stars and moons, and breaking the tranquility of the night.

The Meng Yuan soldiers on duty in the city were frightened by this sudden situation. When they watched the "outsiders" roaring over the high city wall and falling into the city like a meteor, they woke up and heard the fire that soared into the sky. They were rushing to the alarm bell, but the bells that could be heard ten miles at that time were drowned in it.

More soldiers looked at the city behind them in a daze, looking at the government office, the Zhendong Prince's Mansion and the Zhenjun Office were instantly submerged in smoke and fire. The buildings collapsed in the sound of explosions, and it was vaguely seen that someone escaped from it, but was engulfed by the next round of artillery fire that followed. At this time, the ballistics in the sky were weaving, and countless rockets flew by, fell, and exploded, and the waves of air blew like strong wind.

"Help!"

"Put the fire!"

"The commander was killed!"

"The prefect is killed, run away quickly!"...

The city suddenly became in chaos, and the crowd seemed to have ants blown up. They were dressed in disheveled and frightened, rushing and shouting on the streets in the city, but some fell into the explosion, some were swallowed by the fire, some were at a loss, and those who escaped by chance rushed to the city gates and the open space to avoid artillery fire.

"Close the city gate, those who break the door will be killed without mercy!" The military generals on duty reacted at this time and ordered the use of knives and fences to block the city gate, and shoot arrows to kill the crowd trying to break through the city. This caused even greater chaos. The crowd clashed, and the fallen people did not get up again, leaving only a piece of corpse.

After launching a devastating blow to the command center in the city, the Song army's artillery fire immediately turned to the city's garrison and city defense facilities. Rocket launchers bombed indiscriminately, while the artillery fired at key targets such as the city tower, war shed, and stone throwers arranged on the top of the city.

The city tower is both a lookout platform, a command center, a garrison point and a combat platform. After several rounds of fire shooting, the guard wall was already riddled with holes, the thick pillars were tilted and broken, and the flames generated by the explosion of the shells ignited the city tower, like a huge torch illuminating the night sky, and the city tower regarded as a refuge also became purgatory.

As for the battle shed, it is just a temporary building built with wooden boards, and it cannot withstand the bombardment of a shell at all. The person who hit the sky was immediately bombed and flew into the sky. The catapult has always been a weapon of attack and defense, but even a small catapult cannot be moved by a few people. At this time, it becomes a fixed target. In order to completely destroy it, several cannons are often taken care of together.

The city wall is narrow and cannot deploy many troops. On weekdays, only a small amount of troops will be placed as a warning, observing the enemy's dynamics and guarding against the enemy's night attacks. When the enemy starts to attack the city, they will mobilize a brigade of soldiers to defend the city. In order to quickly mobilize troops to the city, a ring road will be built along the inside and outside the city wall, and a garrison point and accumulating city defense materials will be set up along the way, and a horse road to the city will be built.

Due to the protection of the city walls, these stationed troops are difficult to be killed by crossbows. However, firearms are different. You can raise the angle of the artillery and shoot the projectiles into the city. Even if it is difficult to kill soldiers who avoid the city, you can destroy the road and destroy the reserve materials, thereby delaying the enemy's time to go to the city. The victory or defeat is often decided in a very short time...

"Tong Yan is not a big deal to live. The artillery bombardment has lasted for two hours. I want to throw all my family into this!" The North City was lively, the sound of cannons was earth-shaking, and the city was in the sky. However, the south City was very quiet. Guan Hong said to himself when he saw the situation.

"Master, two days have passed since the five-day deadline, so you can still sit there!" Sima Zhang Fan curled his lips.

"Aren't we idle either? We just borrowed some force from them to see how fast the excavation speed is!" Guan Hong laughed without any image.

"Let General Yan know, see if he doesn't turn against you!" Zhang Fan snorted, "Now two tunnels have been dug to the city, and the other ones have some water seepage."

After surveying the terrain, a group of 13th Army decided to break the city by tunnel blasting after discussion. In past siege battles, it has been verified that the destructive power of artillery bombardment on the rammed earth city wall is poor, and it takes a long time to destroy the city wall. And once the attack is not strong, it is easy for the enemy to fill the gap. However, tunnel blasting is different. As long as the amount of medicine is sufficient, it is difficult for the enemy to block it in a short period of time.

Of course, there are many conditions required to implement tunnel blasting, such as whether the soil is loose, the groundwater level, the material of the city foundation, etc. In order to prevent the enemy from sneaking in from the tunnel, some cities will also set up defense facilities. For example, large tanks are buried at any distance under the city to monitor the movements and stills of the ground, and some will dig deep trenches along the city roots, and once the enemy digs through the bottom of the city, they will be discovered.

Nowadays, the right time and place are all in the world. Because the mortal enemy of the Central Plains dynasty was the nomadic people from the north, it mainly defended northward, which also affected the construction of the city. The walls in the north are often thicker and stronger than those in the north. The same is true for Nanyang City. The northern city is made of mountains as natural danger, and the foundation is also built with stones, so the southern city is slightly inferior.

It is the time when the land is frozen, so there is no need to worry about landslides. The moats are short of water and swaying halfway, and there is no need to worry about seepage after the water surface freezes. Moreover, they can use the moats to dig directly forward, even the guide road is saved. In addition, in order to prevent the enemy from assembling under the city, the distance between the moats and the city wall will be very narrow, making it difficult for the enemy to set up siege equipment and reduce the project volume.

At first, Guan Hong also arranged artillery troops to interfere with the enemy in the city to cover the troops digging the tunnel in the dark. But now Yan Feng is fighting lively, attracting the enemy's attention. The deafening explosion and raging fire have covered the movement of the tunnel. This has saved Guan Hong a lot of effort, of course he is so happy that he can't do it.

"In any case, the tunnel dug tonight must be filled with gunpowder to ensure that it can detonate successfully!" Guan Hong nodded and reminded him. He knew that there were too many unexpected factors, so he decided to dig a few more tunnels to ensure the success rate. Moreover, the larger the gap opened, the greater the difficulty the enemy will fill, and his side can also arrange more troops to participate in the impact.

"Well, the throne doesn't have to worry about this. Be careful that tomorrow, Dutong Yan will find out for a night. If we take advantage of us, we will settle the score with you!" Zhang Fan chuckled and teased.

"We will break the city first, and his face is as dark as the bottom of the pot. But we can't blame us. He wants to serve as the main attacker and choose the North City. He thinks he can be condescending and exert the power of the artillery to the greatest extent. He is not afraid of him when he reaches the imperial court!" Guan Hong spread his hands and smiled, "But if His Majesty read the battle report and consumes so much gunpowder, he will be scolded!"

"How will Your Majesty scold you?" Zhang Fan asked after hearing this.

"Your Majesty will definitely say: These prodigal sons are really a puppet, and they must kick them a few times!" Guan Hong said in a puffy voice, holding the airs, and imitating the emperor's tone.

"Haha, be careful to spread it to Your Majesty. You will punish you for slandering the emperor and rub you to the end!" Zhang Fan laughed so hard that he pointed at him.
Chapter completed!