Guandu, Cao Jun's camp.

Some time ago, he captured Yuan Jun and got the information about the supply of grain and grass for the Yuan army, Cao Cao sent troops to intercept and kill the heavy baggage team of the Yuan army, burned thousands of carts of grain and grass, and increased the supply difficulties of the Yuan army, which made Cao Cao happy for several days.

Although the situation has improved for Cao Jun, Cao Jun is still at an absolute disadvantage, and the soldiers of Cao Jun have been looking at each other for a long time, lack of food and clothing, low morale, and many difficulties, and there are local officials in various places have announced the change of flag, this sinister situation made Cao Cao even once germinate the idea of retiring from the army, so he wrote to Xun Yu to ask for advice.

Xun Yu's reply increased Cao Cao's confidence and continued to encourage the soldiers to persevere to the end.

Sure enough, within a few days, there was infighting within the Yuan army, several major strategists fought with each other, and the loser Xu You defected angrily and defected to Cao Cao instead.

Xu You brought the news that Yuan's army had grain and grass stationed in Wuchao, which was forty miles away, and there were no reinforcements outside Wuchao, which made Cao Cao realize that the opportunity to defeat Yuan Shao had come, and immediately left Cao Hong, Xun You and others to guard the camp, and personally led the army to attack Wuchao overnight; After Wuchao was attacked, Yuan Shao was furious when he received the news, and immediately ordered a light cavalry to reinforce Wuchao, and on the other hand, he ordered the generals Zhang He and Gao Ran to lead the army to storm the Cao army camp.

However, the Cao army camp was built strong, Zhang He and Gao Ran led the army to storm and could not break, the two generals heard that the black nest was broken, the guard Chun Yuqiong was killed, and all the grain and grass were burned by the Cao army, and now the attack on the Cao army camp was unsuccessful, and the return of the army will inevitably be severely punished by Yuan Shao, and there is a fear for their lives, so the two of them do not do two endlessly, and surrendered to the Cao army just now.

Taking advantage of the situation, Cao's army launched a full-scale attack, and Yuan's army was defeated and fled, and Yuan Shao fled back to Hebei with only a few hundred men.

This was the biggest victory of the Cao army since the war with Yuan Shao, the Cao army successively killed more than 20,000 Yuan troops, and because there were too many prisoners and insufficient food and grass, and because Cao Cao ordered more than 20,000 people to be killed.

"Hahaha······ This big victory, Brother Ziyuan has made great contributions, come on, please drink this cup! All the generals have worked hard and made great achievements, please drink together! Cao Cao raised his glass and laughed to signal to everyone.

"Prime Minister, please!"

There was laughter and laughter in the big tent, Xu You was even more complacent, he only had one news to make Cao Jun turn defeat into victory, can he be unhappy?

At this time, a guard walked in quickly from outside and whispered a few words to Cao Cao's ear, Cao Cao was silent when he heard this, and explained to the guard: "Good wine and good food, I will see him when I have something to do!" ”

"No!"

After the banquet was dispersed, Cao Cao came to a separate camp tent, and a young man in green clothes immediately got up and saluted him, "Villain Cai Lin see Prime Minister!" ”

Cao Cao sat down at the top and asked, "Xun Yu sent you here, but something happened to Xu Du?" ”

Cai Lin's face flashed with a hint of melancholy, but he quickly returned to normal, and said: "Xun Lingjun heard that Cheng got along with the siege weapon thunderbolt car, and he was quite curious, and wanted to find the drawings and manufacturing methods of this thing, this is Xun Lingjun's personal letter to the prime minister!" ”

After speaking, he presented it with both hands.

Xu Chu stepped forward and took the letter and handed it to Cao Cao.

Cao Cao saw the change on Cailin's face just now, and after reading the letter written by Xun Yu, he raised his eyes to Cai Lin and asked, "Cai Lin, you tell me, is there something wrong with Xu Du?" ”

"This ······ Prime Minister Xun Lingjun said that the war with Yuan Shao at this moment is in a critical period, and he can't be distracted and don't let the villain tell the prime minister! Cai Lin said worriedly.

Cao Cao said: "I'll let you say!" ”

"This ······ Promise! Liu Bei united with Qin Feng, the new Cai Duwei, gathered 40,000 soldiers and horses, known as 100,000 people to attack Xudu, just a few days, Liu Bei's army suffered heavy casualties when attacking the city, but a few days later, Liu Beijun created a building car with a large number of archers standing on the top of the building car to suppress our army's city defense soldiers, covering his soldiers to pick up soil to build earth mountains, one by one earth mountains were piled up, more enemy soldiers shot arrows on the city wall, our army suffered heavy losses, so Xun Lingjun ordered the villain to come to ask for the thunderbolt car map and manufacturing method! ”

When Cao Cao heard the news, he felt like he had been struck by lightning, and his body shook several times in a row, only to feel that his head hurt badly.

"Prime Minister, Prime Minister······"

Two hours later, Cao Cao woke up, he turned over and got up, and saw that the most important strategists Guo Jia, Xun You and others, as well as the generals in the army, Xiahou Yuan, Cao Hong, Zhang Liao, Li Dian, Le Jin and others were there, and said: "Xu Du Liu Bei Xiao'er and Qin Feng Xiao'er are attacking each other, I think you are already clear, what should I do?" Will he continue to lead the army to chase and kill Yuan Jun, or will he immediately return to the division to rescue? ”

Guo Jia stood up and arched his hand: "Prime Minister, in the past few days, our army has severely damaged the main force of the Yuan army, although it has not done its full work, but it has greatly damaged Yuan Shao's strength. The top priority now is to solve the crisis of Xu Du, if Xu is broken, the Son of Heaven is robbed, and the prime minister's previous ten years of work will be in vain! ”

The meaning is obvious, if Cao Cao does not have the Son of Heaven in his hands, Yuzhou, Yanzhou and other places of the four wars will face the attack of the surrounding princes at any time, but I am afraid that by that time, all the places under his jurisdiction will rebel one after another.

Don't mention the future, during the confrontation between Cao Cao and Yuan Shao, many cities in Yanzhou and Yuzhou changed their flags.

Beat Yuan Shao, there will be a chance to fight again in the future, but if Xu is broken, the Son of Heaven is taken away, and everyone present and the families of the soldiers in the army are robbed by Liu Bei, Cao Cao is afraid that it will be the time for everyone to betray his relatives and leave and be at the end of the road.

He immediately ordered Xiahou Yuan to lead 5,000 men and horses to go into battle lightly, and quickly return to help Xu Du, which can be seen to be the opportunity, and at the same time sent people to carry the thunderbolt car construction atlas and the method of production all the way back to Xu Du, so that Xun Yu organized craftsmen to build a building car to deal with Liu Beijun.

Then Cao Cao ordered the class teacher.

Cao Cao's time after defeating Yuan Shao this time was much earlier than in the other world, which also allowed Yuan Shao to retain more strength.

The actions of Cao Cao's army were detected by the meticulous workers, and all parties were moved by the meticulous workers and sent the news out one after another.

Yuan Shao soon received the news, and a heart fell back into his stomach.

Outside the city of Xudu, the war is in full swing.

Liu Beijun built more and more earth mountains outside the city, and more and more archers were used to suppress the defenders on the city walls, which made the situation of the defenders more and more critical.

Fortunately, that night, the messenger brought back the Thunderbolt Construction Atlas and the manufacturing method from the secret passage and handed it to Xun Yu, who immediately gathered all the carpenters in the city overnight to collect wood to build the Thunderbolt.

The city has a large population and many carpenters, and more than 30 were built overnight.

The next day, before dawn, a series of thunderbolts were assembled on the city wall, and at every other section of the city wall, the people hung stones from under the wall to the city wall with slings.

When Liu Bei's army came to attack the city, many soldiers saw these tall wooden tools that suddenly appeared on the city wall, but no one knew what they were, but Qin Feng recognized it at a glance, and the trebuchet built by Xi Ji, the ink artist under him, was much more sophisticated than this.