Cao Cao had already seen that new objects had been added to the battlements of the Xiapi city wall, but he couldn't think of what it was for, and his heart was not steady.

Xiao Zhuge Liang gave an order, and the soldiers of the equipment battalion on the south wall operated together, shaking the mechanism, and a popular sledgehammer with a handle was suddenly suspended outside the wall, and there was one every three feet, and from a distance, the wall was all over the wall.

Cao Cao still didn't understand, full of suspicions, and didn't understand what Zhuge Liang was using hanging some hammers on the city wall.

Cao Bing won by virtue of his large number of troops, and the large group of men and horses rushed across the moat, erected ladders, and began to attack the wall.

Cao Cao was overjoyed, looking at the current situation, although the soldiers suffered heavy casualties, they should be able to attack the city soon.

With joy in his heart, Cao Cao turned over and dismounted, and personally beat the drum to cheer. The morale of Cao's army was greatly boosted, and the offensive was surging like a tide, scrambling to climb the city wall.

Xiao Zhuge Liang sat on the lift chair, looked down unhurriedly, and saw that some Cao soldiers had already climbed half of the city wall, and then ordered: "Captain Ma Ying, bother to start the city trailer."

Ma Jun surrendered his hand and raised the flag. The soldiers of the equipment battalion on the south wall moved when they saw the order, and at the same time they were at the mercy of the organs.

The two hundred and fifty wolf's tooth sledgehammers on the outside of the city wall suddenly swung from side to side in unison, and the scene was spectacular and unusual.

The ladders erected by Cao Bing on the wall were all swept down in an instant. Thousands of siege soldiers fell down the ladder almost at the same time, wailing and screaming, and countless people were killed and injured. There are also a lot of people who were directly hit by the meteor hammer, and they suddenly changed into sieves. The corpse fell to the ground and fell again, and the flesh and blood were blurred.

Cao Cao held the drumstick in both hands, and was immediately stunned, "This ......!" This......! ”

"This" didn't say a word for a long time, and the trailer seemed to be completely beyond his comprehension.

The eastern, western, and northern siege soldiers and horses also came to report one after another, and the situation was similar to that of Cao Cao.

Cao Cao was dumbfounded on the spot, as if there was an unsolvable situation in front of him. It is also true that on the entire Xiapi city wall, the big iron wolf's tooth hammer is flying and fighting, which is really not something that flesh and blood can break through.

Cao Cao hurriedly summoned the military generals to discuss countermeasures. Xun Yu, Xun You, Cheng Yu, Chen Qun, Wang Yun and so on, these big think tanks, you look at me, I look at you, all of them are speechless.

It's like a tiger biting a hedgehog and not knowing where to start. The wolf's tooth barb on the meteor sledgehammer was a foot long, connected to the hammer body, and protruded more than two feet from the wall.

The distance from the city wall to the moat is very narrow, and the ladders are erected, almost all of which are attached to the wall skin, and it is impossible to avoid it at all. The big hammer swung back and forth, and the sweeping ladder was not like a broom sweeping the leaves.

Cao Cao himself had no choice, thought for a long time, and stomped his feet angrily. In the end, it was inevitable to pass an order, suspend the siege, set up camp outside the four gates, and discuss again.

Watching the drill soldiers retreat, Xiao Zhuge Liang laughed, and clasped his fists at Ma Jun and said: "Captain Ma Yingwei is really a miracle, and he retreated from the enemy today, and he has made great contributions!" ”

Ma Jun was also very happy when he saw that his invention had played such a big role, and hurriedly thanked him.

Early the next morning, Cao Cao marched to the city in person. But they did not dare to send troops to attack the city again, but lined up in formation, so that people went out of battle to fight the enemy. scolded the eighteen generations of Gao Yun's ancestors, just to provoke the tiger army to fight.

But Xiao Zhuge Liang sent someone to shake the chair high, sat on it and shook his little head, and looked at Cao Cao with a smile, but he was indifferent.

Cao Cao was angry, his eyes were on fire, and his seven orifices were smoking, so he almost cursed.

In fact, after Cao Cao heard the news that the soldiers and horses of Liuxian County had withdrawn to Xiapi, he also expected that this Xiapi City would not be easy to fight.

But he felt that he had 300,000 soldiers and horses under his command, and even if he used a base, he could break Xiapi City. At most, it is the loss of some soldiers and horses, but compared to coercing the Son of Heaven to order the princes, this price is really nothing.

But he never expected that there would be such an inventor as Ma Jun in the Huwei Army. Breaking the mark made all of his siege equipment unusable, and his last crowd tactics also made the trailer hopeless.

In fact, if Cao Cao lost to Gao Yun, he would not be so angry. The most unbearable thing is that he lost in the hands of a doll, and this face is really unbearable.

But being angry is nothing, Cao Jun ruined the city for a day, and there was no reaction in the city. Cao Cao had no choice but to send an order to collect his troops and return to the barracks temporarily.

Xiao Zhuge Liang saw Cao Bing leaving, so he reached out and took out two cotton balls from his ears, and muttered: "Stuff this thing for a day, it's uncomfortable to die."

Look at the soldiers and generals around him, all of them are angry and pale. Xiao Kong Ming secretly rejoiced in his heart, "Fortunately, I plugged my ears and couldn't hear anything." Otherwise, these dogs will scold my uncle and not make me angry......."

This is how children deal with it, often adults can't do it, but it's very effective.

Cao Cao returned to the barracks, at a loss, unable to eat and sleep. Anxiously pacing back and forth in the big tent of the Chinese army.

"Report!" , This sudden word "report" came from outside the tent, interrupting Cao Cao's troubled thoughts, and asked casually: "What's the matter!?" ”

"Lord Qi, General Xiahoudun of the Northern Front sent scouts to report the emergency military situation."

Cao Cao was stunned for a moment, then then changed his mind, and his heart was "Oh!" All of a sudden, "Quick!" Call him in! ”

The attendant opened the tent curtain, and a scout entered the tent and knelt down to report: "Lord, General Xiahoudun sent the villain to come to report, and Gao Yun made Guan Yu's army return to Xiapi, which has arrived in Langya." General Xiahoudun saw that Guan Yu's army was strong, and he did not dare to fight without permission. He withdrew the siege of Langya, and moved his troops to camp in Jiqiu, south of Langya, and asked the Lord to publicize it."

When Cao Cao heard the news, his face immediately changed. What he was most worried about was that when the Huwei army returned to Xiapi, Xiahoudun and they had not yet captured Langya.

In this way, Gao Yun's reinforcements can drive long and march straight to Xiapi. In order to take Xuzhou in a hurry, Cao Cao led the army to double the way and went straight to Xiapi, carrying not much grain and grass.

The cost of an army of 300,000 is huge, and the weight of grain and grass is the primary problem. And Cao Cao's rear is thousands of miles away in Yanzhou, and the transportation of chariots and horses is extremely labor-intensive.

If Guan Yu led his troops and horses close to Xiapi, Cao Cao had to retreat to Pei County first. Otherwise, Guan Yu might directly insert Cao Bing's back diagonally and cut off the grain channel.

And if Cao Cao retreats to Peixian and wants to conquer Xuzhou, it will be basically impossible. In other words, even if he lost soldiers and horses and spent money and food in vain, he also completely offended Gao Yun.

This was naturally the last thing Cao Cao wanted, and after thinking about it again, he sent someone to send an order to Xiahoudun, so that the soldiers and horses on the northern front would rely on the terrain of Jiqiu to block the reinforcements of the Huwei army. So that I can buy some more time for myself to attack the next Pi.

As soon as Cao Cao passed the military order to the northern front theater, the scouts from the southern front came overnight and knelt down to report urgently, "Report to the lord!" Sun Ce led tens of thousands of soldiers and horses across the river and arrived in Huailing! ”