Just as Zhuge Liang arranged, Wei Yan led the heavy infantry to quickly advance to the east gate of Yong'an City three miles away, after the army lined up, they began to build fortifications, Huang Zhong led 5,000 riflemen to the front, Zhao Yun's 20,000 Hu Qi constantly swam on both wings.

Under such a large-scale arrangement, the enemy had no chance to raid at all, and the defenders in the city seemed to feel impossible, so they simply chose to be silent, and there were only a dozen military flags floating above the city, but there were not too many soldiers in sight.

When Wei Yan finished building the fortifications, the artillery battalion's cannons were also dragged up, and after a simple assembly, the first shell accurately hit the east gate of Yong'an, and the smoke instantly covered the city tower, and when the smoke dissipated, a huge black shadow had been left on the city gate.

When Yuan Yun saw this, he was a little surprised, and said: "The other party's city gate is made of solid strength, I don't know what kind of material it is." ”

Hearing this, Zhuge Liang slowly put down the telescope in his hand, and then replied: "It should be ironwood, this kind of wood is extremely strong and very fire-resistant, it is a specialty of Shudi, but I don't want the enemy to use it as a city gate, this price is big enough." ”

Pang Tong continued: "Now Liu Bei is simply reckless in Shuzhong, everything is based on military premise, so there is no need to worry about this kind of iron wood appearing here, and once we enter Yizhou Shu in the future, I am afraid that every city will be set up like this." ”

"Artillery bombardment of the city wall, since the city gate is so strong, let's choose another location, I don't believe that the other side even uses ironwood for the city wall." When Yuan Yun gave the order, he looked at the city walls with his binoculars again.

These walls also look very strange at the moment, because they are not very high, and it can even be said that they have been artificially shortened, only four or five meters above the ground, and this height is not as good as the protective walls of some villages and towns.

However, after reducing the height of the city wall, the other party dug a huge trench in front of the city wall, and just by looking at the width, you can guess that this is specially designed for the cannon of the Gunpowder Army, because no matter how many shells are thrown, it is impossible to fill this trench.

After receiving the new order, the artillery battalion immediately began to choose a section of the city wall to focus on bombing, but the efficiency was not very high, after all, after being attacked before, the number of artillery pieces that could be used was less than twenty, and the current artillery technology is not as good as that of later generations, and after each shell is fired, a lot of preparation work needs to be done.

The time of such a bombing naturally became very long, when the wall finally collapsed, the sky began to gradually darken, Zhuge Liang immediately issued an order to return to the camp at this time, so the artillery battalion withdrew first, followed by Wei Yan and Huang Zhong's troops, and Zhao Yun continued to take Hu Qi to wander around the periphery.

The night went uneventful, and when dawn came the next day, the Gunpowder Army continued the same work as yesterday, but in the same night's work, the enemy had filled in the collapsed wall, and the broken wall was erected again.

The fortifications built by the Gunpowder Army yesterday in front of the battle were also demolished by the enemy overnight, and they must be built again today.

In this way, you have been fighting back and forth for a few days, Yong'an's city wall is no longer enough, there are ruins and broken walls everywhere, even if the other party has repaired it, it looks very dilapidated at the moment, and the height has dropped to nearly three meters, such a city wall basically has no defensive ability, the only advantage is that it can still be higher than the siege army, so there will be more options for attack.

After Pang Tong looked at the ruined city walls, he just sighed and said: "It's too much time to do this, we should attack overnight, although the vision is blocked at night, there will be some danger, but we are better than the firepower, and if the enemy wants to attack at night, he will inevitably pay a great price." ”

Zhuge Liang heard Pang Tong say this, and also nodded, and said: "Liang is indeed a little careful, since the other party has not been able to shrink, we bombed overnight, but this time the front fortifications are also built stronger." ”

While Zhuge Liang spoke, he had already begun to order the camp to cut down giant trees, and then built fortifications in the front formation, and there was no shortage of steel wire, earthen walls, horse rejection arrays, and peripheral stake walls, and even stronger than in the camp.

When these fortifications were completed, it was dark again, and Wei Yan received an order to stay up all night, and to be cautious on the first night to ensure the safety of the artillery battalion.

Huang Zhong received an order that while sleeping, rifles must also be put on the table, and the soldiers should be fully armed and ready for battle reinforcements at any time.

Zhao Yun was relatively relaxed, he still kept roaming around the periphery, guarding against all the influx of the enemy's rapid troops.

That night, the other side still took the action of sneaking up on the fortifications at night, but it was baptized by a bullet from the rifle battalion, and after more than 1,000 people were killed and wounded, the brigade quickly withdrew to the city.

From this day on, the cannon sound of the artillery battalion never stopped, and the other side's city wall became more and more dilapidated, and in the end the defenders directly gave up repairing, and only piled up huge stones, and a bunker was completed.

After bombing like this for three days, when everything became the norm, Yuan Yun also got used to it, and the sound of artillery in the middle of the night could hardly affect his sleep.

But as he sat down on the bed, there was a sudden inexplicable sound in his ears, which seemed very strange, from far to near, and intermittently, and it was barely possible to judge that these sounds were extremely wide in scope and huge in scale.

When Yuan Yun came out of the camp, he had already seen Zhuge Liang and Pang Tong, and the two of them were also confused, and the three of them stood in the camp like this, quietly listening to the sound coming from a distance.

After a while, Zhuge Liang was the first to react, so he immediately ordered: "Immediately let the soldiers in the front retreat, discard the artillery that is difficult to take away, and destroy the stranded shells on the spot." ”

The herald saw that the military division was so panicked, so Pegasus galloped out, and soon Huang Zhong and Wei Yan received the order, so they immediately began to retreat, and those artillery pieces were discarded in place, and the shells were also concentrated, but when the fire was destroyed, some of the soldiers of the artillery battalion were a little unable to do it after all.

So there was a long delay, and when the first men withdrew, the non-commissioned men of the artillery battalion were still hesitating, but their hesitation did not last long, and by the time they finally figured out why they had to withdraw suddenly, it was too late to escape.

The defenders of Yong'an County actually dug the Yangtze River, and then led the water to pour in this direction, and when such a monstrous wave hit, the artillery battalion soldiers who had not had time to withdraw were wiped under the water in an instant.

This thought that the flood was very huge, Yong'an City because it was located on the high ground, so it was not greatly affected, but it was also flooded to more than one meter of the city wall, and the low-lying gunpowder army front did not have such good luck, the whole position instantly turned into an ocean, after the water passed, the opportunity here was razed to the ground, only some traces of the foundation can still be seen shallowly.

On the morning of the second day, Yuan Yun frowned, this expedition can be said to be a series of hits, not only did he lose almost all the gasoline before, but now the artillery battalion was almost wiped out, and the artillery was all lost.

Looking at the statistics returned, there are more than 1,000 people in the artillery battalion, and now there are less than 100 people left, which can be described as the most serious disaster since the formation of the gunpowder army.

When he looked at the Yong'an city wall with a telescope again, Yuan Yun couldn't help but smile bitterly, and said to Zhuge Liang beside him: "No wonder the other party has to repair those blown up city walls even if they are broken, even if they are very ugly, but they can be regarded as blocking the invasion of the city by the big water, it seems that they have long been prepared to flood the three armies."

If Kong Ming hadn't been cautious and chose to set up camp on this high ground before, we were afraid that we would be taken away by the flood at one time, but now that I think about it, I still have a feeling of running backwards, and the other party seems to have a smart person this time. ”

Zhuge Liang nodded slightly, but his face was full of smiles, not only him, but Pang Tong was also excited, and both of them looked very excited.

Seeing the two of them like this, Yuan Yun also smiled and continued: "It seems that you have finally encountered some opponents, so it is up to you to solve this trouble later." ”

Zhuge Liang bowed his hand slightly, replied kindly, and then said: "This water attack seems to be an extremely simple plan, but it involves a lot of details, whether it is the mastery of time, or the ability to execute, it is not something that ordinary people can do, and Liang has long heard that there are wise men such as Jiang Wan and Ma Liang in the land of Shu, and this time it seems that it is really right." ”

Yuan Yun listened to Zhuge Liang's words, smiled bitterly again, and then joked: "The other party's strategists are so powerful, shouldn't Kong Ming and Shi Yuan also find some fields, such as what kind of fire attack, water attack and the like, we don't need to spend a single soldier, and then watch the enemy throw rats." ”

Yuan Yun said unintentionally, but Zhuge Liang and Pang Tong listened intentionally, the two glanced at each other instantly, Zhuge Liang shook the feather fan, and said: "Since the lord said about water attack, then we will return a tooth for a tooth, and also use this method to give the other party a trick." ”

Pang Tong also immediately continued: "The other party has dug the river channel, and this will be flooded, if there is another big flood, those walls that have been bombed by artillery will probably not be so strong again." ”

Yuan Yun also understood, so he smiled and said: "It's just that Yong'an City is at a high place, even if the water rushes in, at most they will be washed a little, and it won't cause much damage, I think we should put something else down the river to help." ”

Zhuge Liang and Pang Tong immediately praised the good when they heard this, and the things that Yuan Yun said to help the battle were naturally some remaining gasoline, as well as explosives bags packed in wooden barrels, etc., if these things drifted down the river to the edge of Yong'an City, the consequences could be guessed without thinking about how tragic they were.