"Cao Cao annexed the four prefectures of Hebei, and his strength has increased sharply. So I should also prepare to form an alliance with Sun Quan and Liu Bei, and everyone will beat Cao Cao together. Cao Cao is not good at water battles and has no generals who are good at water battles. This is his fatal flaw. As long as he leads his troops south, he will definitely suffer a crushing defeat. However, before leading his troops south, Cao Cao will definitely try to destroy me, Liu Yu first." Liu Yu murmured.

More than a month ago, Sun Ce was assassinated during the hunting trip of Dantu. Although he bravely killed the assassins, he was unfortunately stabbed in the abdomen by one of the assassins. Half a month later, his wound was infected and died in Jianye. Before his death, his brother Sun Quan was ordered to inherit Jiangdong, so Jiangdong is now Sun Quan in the head of the family.

Guanzhong is the most powerful guard at Tongguan today, and Liu Yu is not afraid of Cao Cao's attack at all.

Just as Liu Yu thought, after annexing the four prefectures of Ji, You and Qing, Cao Cao began to attack Liu Yu again after about a year of rest.

Countless food and grass were transported to Hongnong and the Luoyang area was hoarded, and a large number of Cao's soldiers were also transferred to Hongnong and Luoyang areas.

The storm was about to come and the wind filled the building. Whether it was Guanzhong or Xudu people, they felt the dense clouds of war and felt a war that was about to break out, which was no less than the Battle of Guandu.

Man Chong came to report, "Lord, Cao Cao has gathered 450,000 troops in Hongnong and Luoyang, and there is still an increase. It is estimated that the army will be no less than 500,000 in the end!"

Liu Yu was not panicked, "Cao Cao really respects me in the 500,000 army."

Guo Jia also smiled without fear at all and said, "This is a battle that is no less than the size of the Battle of Guandu, or even better than the Battle of Guandu."

After Cao Cao annexed Yuan Shao's territory, he had more than 700,000 troops, but mobilizing 500,000 troops to attack him was Cao Cao's limit.

Chen Gong said, "Although Cao Cao has many soldiers, there are 400,000 troops in the lord's public relations, and the Qiang and Di have been resolved, and they are free to worry. They can fully mobilize 300,000 troops to meet the enemy. There is also the Tongguan natural chasm, so they are not afraid of Cao Cao at all."

In the past, when a million troops of the six countries were unable to break through Tongguan and destroy Qin, Cao Cao had 500,000 troops, but he could do whatever he could do to Tongguan.

Liu Yu nodded and said, "What Gongtai said is very true. I don't think Cao Cao can break through my Tongguan and break into Guanzhong to destroy me."

Jia Xu suddenly laughed and said, "Lord, I think Cao Cao is not unaware of the dangers of Tongguan, but he may not be sure to break through Tongguan."

Liu Yu was stunned and did not think that Jia Xu was talking. If Guo Jia was smart, he had a greater direction, strategy and good plan, then Jia Xu was more good at predicting the enemy's initiative.

After thinking about it, Liu Yu asked, "Wenhe said this?"

Jia Xu laughed and explained, "It will be difficult to break the strong attack of Tongguan, but if there is an internal response, what will be disintegrated from the inside? Even if there is no internal response, you can bypass Tongguan, cross the Yellow River from the east of the river, and directly enter Guanzhong."

Liu Yu, Guo Jia and others were all thinking.

Guo Jia said, "The Yellow River in the north of Tongguan is turbulent, and there is no large-scale crossing of the beach. It can only cross 10,000 or 20,000 people a day. In addition, it is difficult to transport food and grass. Just take precautions in advance, and Cao Cao has no chance and has to attack from Tongguan. He has to be wary of Cao Cao being in-house."

In the past, the six kingdoms attacked Qin, but the reason why they attacked from Tongguan every time was because of the various limitations of the Yellow River in the north of Tongguan. To break Tongguan, internal response was the most ideal move.

Chen Gong interrupted, "In the Battle of Guandu, Yuan Shao was defeated by Cao Cao because of Xu You's rebellion. Cao was treacherous and coerced the court to make good use of this move. The lord really has to be careful." If you want to say that the worst impression of Cao Cao was, no one could compare to Chen Gong. The one who did not want to see Cao Cao won the world was Chen Gong, so Chen Gong would smear Cao Cao as long as he had the chance.

Liu Yu also knew that Cao Cao was treacherous, and Liu Yu did not dare to be careless at all when he faced Cao Cao.

Suddenly, something happened, and a cold light flashed across Liu Yu's eyes.

That night, Liu Yu attracted Man Feng again, and asked him to closely monitor Han Sui, Ma Teng, and even Zhang Lu. If anyone under his command had some status and was easily bought by Cao Cao, there was undoubtedly a small possibility for these three people, Zhang Lu was still relatively small, but Han Sui and Ma Teng might not have been. These two people once ruled Liangzhou. Although they were defeated by him and surrendered to him, there were still many old generals of the hundreds of thousands of troops in Guanzhong.

Man Chong is worthy of being the first cruel official and intelligence leader of the Three Kingdoms. Cao Cao had him in history. No matter how Emperor Xian of Han and Dong Chengfuwan conspired to jump around, he couldn't find anything.

What a variety of tricks.

Soon Man Chong found clues. Han Sui and Ma Teng have met unknown people recently, especially Han Sui has more times. Man Chong also monitored Han Sui with secret letters and intended to send them to Xudu.

Man Chong did not hesitate at all and immediately started to intercept. In history, Man Chong could even stop the extremely secret robbery, so Han Sui's secret letter was naturally difficult to reach Xudu.

After reading the secret letter that Liu Yu had been furious, he was furious, "Han Sui's traitor, he felt that I didn't value him, so he was persuaded by Cao Cao to rebel against me and surrender to Cao Cao. OK, it's great!"

Liu Yu's most trusted adviser was undoubtedly Guo Jia. After receiving this secret letter from Han Sui, he summoned Guo Jia to discuss secretly.

"Fengxiao, what do you think?" Liu Yu asked Guo Jia.

Guo Jia thought for a while and said ruthlessly, "If you fight with Cao Cao, you can defeat Cao Cao with a plan. If you just want to defend Tongguan, you can kill him immediately!"

Of course, Liu Yu was not prepared to fight Cao Cao. Even if he defeated Cao Cao once with a plan, he would be extremely proud of Cao Cao's loss of 100,000 or 200,000 troops. He would not be able to kill Cao Cao and swallow Cao Cao's territory. He wanted to wait for Cao Cao to fight against Liu Biao, Liu Bei, Sun Quan, and others to fight Cao Cao together with Sun Quan, Liu Bei and others. He is too strong now. When the alliance is in the future, Sun Quan and Liu Bei will definitely be deeply guarded by Sun Quan and Liu Bei.

It would be good to hold on to Tongguan. If you can't attack Guanzhong, Cao Cao naturally considered the battle in the south first, and then the opportunity for the alliance would come.

"In this way, then kill him immediately!" Liu Yu said coldly.

I asked someone to call Lu Bu and asked Lu Bu and Man Chong to lead troops to surround Han Sui's mansion and capture Han Sui. The reason for Lu Bu was that Liu Yu felt that Lu Bu was the most experienced in raiding houses and seizing people. After all, when he was following Dong Zhuo, Lu Bu often did such things.

Lu Bu then rode a Red Rabbit Horse, held Fang Tian's painting halberd in his hand, and led a thousand soldiers to Han Sui's mansion with Man Chong.

Although Lu Bu is almost fifty years old now, he is old and has no son. After the defeat in Xuzhou, he has no intention of fighting for dominance and just wants to be an ordinary general who does not need to worry too much, his temperament will not change and he still has the arrogance of the world's most powerful general.

Lu Bu didn't say a word of nonsense and broke into Han Sui's mansion directly. Those who blocked the road were all ruthlessly killed!

"Puff!" Fang Tian waved his painting halberd and killed two more.

When Lu Bu and Man Chong broke into the inner hall, Han Sui finally appeared.

Han Sui accused him, "Lu Bu, are you rebelling?"

Lu Bu sneered, "Han Sui, you want to surrender to the thief Cao and betray your lord, and your crimes are unforgivable. The lord ordered me to capture you."

Han Sui was shocked and turned around and wanted to escape.

However, in front of Lu Bu, the world's most powerful general, he could not escape. He was slapped in the chest by Lu Bu, vomited blood and fell to the ground, and was then captured by soldiers.

After Lu Bu and Man Chong captured Han Sui, Liu Yu ordered him to be beheaded.

When Ma Teng learned that Han Sui was beheaded, he trembled in horror and came to ask Liu Yu.

Liu Yu still wrote Han Sui to send Xu Du's letter in front of Ma Teng, and said coldly and meaningfully, "If you don't know what you want, Han Sui wants to betray me, you should be punished!"

Ma Teng's hands were trembling. After reading the letter, he knew that this was a solid evidence. Han Sui died, so he looked up at Liu Yu, and saw that he was coldly staring at him. Ma Teng felt very panicked.

Liu Yu said, "Ma Teng, what said just now is to both Han Sui and you. If it were not for Ma Chao's sake, Han Sui's fate would also be to you."

Ma Teng's face turned pale and almost fell to the ground. It seemed that Liu Yu also knew that Cao Cao's people wanted to instigate him to rebel. His biggest mistake was that he did not report it to Liu Yu in time afterwards, which showed that he might not have the same thoughts as Han Sui.

Liu Yu said to Ma Teng earnestly, "Meng Qi is one of the few powerful generals in the world. With him, I will achieve great achievements. Your Ma family is a prince. You should remember it!"

There are many powerful generals around him, and it is impossible to reuse Han Sui and people like Ma Teng. Liu Yu was not too surprised by Han Sui's betrayal, but Ma Chao is behind Ma Teng, who is extremely proud of Ma Chao and Liu Yu. This is to tell Ma Teng that even if he cannot reuse it, his son Ma Chao can reuse it. If he achieves hegemony in the future, Ma Chao will be able to make his Ma family prosperous and ask Ma Teng to keep his duty.

Ma Teng trembled and lowered his head without saying a word, saying that he had listened to Liu Yu's words.

r        />From Liu Yu, Ma Teng's body was still trembling and he met his son Ma Chao at the door of his house.

Seeing that his father Ma Teng was full of strangeness, Ma Chao asked, "Father, why is this?"

Ma Teng said to Ma Chao, "Meng Qi, lord, be kind and righteous, you should be loyal and support me. Our Ma family will depend on you in the future."

Ma Chao didn't understand why, but Ma Teng knew that he accepted his fate. He was once one of the two masters of Liangzhou and a hero. He was actually not willing to be reused under Liu Yu's command. He also had the intention of rebelling, but now he has no more. At least he still has his son Ma Chao, and the Ma family will eventually have a place under Liu Yu's command in the future.

"If my father doesn't say it, the child knows that the lord is a wise ruler, and the child will be loyal to assist him." Ma Chao didn't quite understand what Ma Teng said, but he said to Ma Teng.

Ma Teng nodded, not wanting to say more.

...

Cao Cao had arrived in Luoyang, and only after hearing that Han Sui was beheaded by Liu Yu.

He gritted his teeth and said unwillingly, "Liu Shimin is indeed treacherous. He actually saw through Han Sui in advance. This left my inner support no longer, and Tongguan was not easy to break!"

Although he destroyed Yuan Shao and swallowed the four prefectures of Beihe, Cao Cao has always regarded Liu Yu as his lifelong enemy. His biggest wish now is to attack Guanzhong and destroy Liu Yu.

Since the Warring States Period, the five countries have repeatedly joined forces to attack Qin and were blocked by this pass, and have always been regarded as the world's most powerful pass. Without internal support and relying solely on strong attacks, Cao Cao was really not sure to break through Tongguan and break into Guanzhong.

Of course, the army had been mobilized, and the food and grass were transported to Luoyang, Hongnong's front line, and he also came to Luoyang. It was impossible for Cao Cao to retreat without trying at all. The force of attacking Tongguan was like an arrow on the string and had to fire it.

In August of the seventh year of Jian'an, Cao Cao personally led a 500,000 army to the Tongguan and launched a fierce attack on Tongguan.

After more than a month of attack, he tried to break through the Yellow River in the north of Tongguan, but it failed. In the end, Cao Cao even ordered some tiger and leopard cavalry to be used as infantry to participate in the attack, but he failed to break through Tongguan and enter Guanzhong. Instead, he lost 50,000 or 60,000 troops and ran out of food and grass.

Just at this moment, news came from Jingzhou.

"What, Liu Bei's mat and foot sellers dare to take advantage of my attack on Tongguan and intend to threaten Xu Du with Liu Biao?" Cao Cao was furious.

In name, to prevent Liu Bei, Liu Biao attacked Xudu. Cao Cao finally withdrew from Tongguan and returned to Xudu.

When Tongguan saw Cao Cao withdrawing his troops, Liu Yu breathed a sigh of relief. He mobilized 300,000 troops to defend Tongguan for a month. He also killed and injured 20,000 to 30,000 soldiers. In addition, the food and grass accumulated by the Qiang and Di in one year were basically consumed. It would be best for Cao Cao to withdraw his troops at this time.
Chapter completed!