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After Cao Pi's death, Jiangdong's offensive against Cao Wei never stopped, and in the sixth year of Jiahe (237), Quan Cong, Zhu Huan and others attacked Lu'an, but failed to conquer it. In the second year of Chiwu www.biquge.info(239), Sun Quan sent Yang Zhen, Zheng Guan, Sun Yi and others to attack Liaodong across the sea. In the fourth year of Chiwu (241), Sun Quan sent troops to the north, but was finally repelled by Sima Yi, Wang Ling and others.

【Defeat and retreat to Lu'an】

In the sixth year of Jiahe (237), Sun Quan first sent the Wei general Quan Cong to attack Lu'an, but he could not defeat it. Later, Lu Xi, the chief secretary of Lujiang in the Wei State, asked the Wu State to send a large army to prepare to open the city gate as an internal response. Former general Zhu Huan and Wei general Quan Cong led the army to meet Lü Xi. When the army arrived, the matter was revealed, and the troops should be returned. There is a stream outside the city of Lujiang, about a mile to the city, more than 30 zhang wide, eight or nine feet deep, four or five feet in a shallow place, all the departments cross the water and leave, Zhu Huan personally broke off. At that time, Li Ying, the Taishou of Lujiang, was strictly reorganizing his troops and horses, trying to wait for the Wu army to cross into the river and take advantage of the situation to force the attack. When he saw Zhu Huan's flag car at the back of the team, he finally didn't dare to go out of the army. He was afraid that Zhu Huan would go so far.

At that time, Quan Cong was the governor, and Sun Quan ordered the partial general Hu Zong to publicize the edict and let Hu Zong participate in the military. Quan Cong had nothing to gain from the army, so he discussed plans to deploy various generals and carry out some sneak attacks. Zhu Huan has always been arrogant, so he was ashamed to see his subordinates, so he went to see Quan Cong, asked about the intention of the action, and was angry because of excitement, and argued with Quan Cong. Quan Cong wanted to free himself, so he said: "The lord himself ordered Hu Zong to be the governor, and Hu Zong meant to be like this." Zhu Huan was even more angry, and when he came back, he sent someone to call Hu Zong. Hu Zong came to the military gate, Zhu Huan came out to greet him, turned around and said to his subordinates: "I'll let go of my hands and feet, you all go away." "One of them went out first and told Hu Zong to tell him to go back. Zhu Huan came out, but he didn't see Hu Zong, and knew that it was a letter from his subordinates, so he killed that person. His army came forward to admonish him, and he killed the army, so he pretended to have a fever and went to Jianye for treatment. Sun Quan cherished his merits and talents, so he did not punish him.

According to the "Chronicles of the Three Kingdoms: The Biography of Zhu Ran", in the fifth year of Chiwu (242), the Wu army conquered Zhezhong, and the Wei generals Pu Zhong and Hu Zhen each led thousands of people. At that time, the soldiers and generals under the command of Zhu Ran had already been distributed everywhere, and after hearing the news, they did not have time to recall the concentration, so they led the existing 800 people in the military camp to rush to kill. Pu Zhong fought unfavorably, and Hu Zhen and others retreated.

However, Sun's similarities and differences said: (Wei Zhi) [Wei Shu] and Jiangbiao Chuanyun Ran took the first year of the beginning of the Jing Dynasty and the second year of the beginning of the reign to become a coward, and the Hu Zhen and Pu Zhong were in the first year of the early Jing Dynasty. Wei Zhicheng Wei Shu, according to the violation of not saying that the quality was broken, and Zhiyun retreated. Wu Zhi said that in the fifth year of Chiwu, in the first three years of Wei, Wei fought Pu Zhong and Zhu Ran, and his loyalty was unfavorable, and the quality was retreated. According to the records of Emperor Shaodi of Wei and the biography of Sun Quan, it was okay to be old, but Chen Shou mistakenly thought that Wu Jiahe was six years old and five years of Chiwu.

【Great Northern Expedition】

In the spring and March of the same year (239) after Cao Rui's death, Sun Quan sent envoys Yang Zhen, Zheng Guan, and general Sun Yi to Liaodong to attack Wei guards Zhang Zhi and Gao Xi, capturing many men and women.

In the fourth year of Chiwu (241), Sun Quan even sent the Wei general Quan Cong to attack Huainan, break open Shaobei, burn the granary of Ancheng, and plunder the people there. Weibei general Zhuge Ke attacked Lu'an. Quan Cong and Wei general Wang Ling fought in Shaobi, and more than ten people including Qin Huang were killed by Zhonglang of Eastern Wu. The general Zhu Ran besieged Fancheng, and the general Zhuge Jin captured Zhezhong.

According to the "Spring and Autumn Period of the Han Jin Dynasty", before Sun Quan sent troops. Lingling Taishou Yin Za said to King Wu: "Now that God has abandoned the Cao family, funerals and murders continue to appear. When this tiger fights, let a child come to power. His Majesty should personally lead the army, seize the chaotic country, conquer the declining world, make the best use of the manpower and material resources of Jingzhou and Yangzhou, investigate the number of Ding Zhuang and the old and weak, let Ding Zhuang go into battle, and the old and weak transfer materials; In the west, let Shu Han garrison in Longyou; ordered Zhuge Jin and Zhu Ran to lead the army to Xiangyang; Lu Xun and Zhu Huan went to Shouchun separately; His Majesty marched north of the Huai River and attacked Qingzhou and Xuzhou. Xiangyang and Shouchun are besieged by us, the west of Chang'an must defend the Shu army with all their might, and the army forces of Xuchang and Luoyang must be dispersed. At that time, the generals and commanders will fight, as long as there is a miscommand and one army is defeated, the three armies will be disheartened. We just prepared horses and wagons, captured the city, pursued the victory, and pacified China. If we do not dispatch the whole army, but only a small number of troops as before, it will not be enough to accomplish great things, and it will be easy to be defeated repeatedly, the people will be exhausted, the military prestige will disappear, time will pass, and the strength will be exhausted. That's not the way to go. However, King Wu did not accept it.

Quan Cong was the governor of the capital, and Wei Zhengdong general Wang Xuan fought in Shaobei, the situation was unfavorable, Wei soldiers took advantage of the victory to trap the five battalion general Qin Huang (Qin Er) army, when Gu Tan's younger brother Gu Cheng and Zhang Xiu both went north to Shouchun, after Wang Ling called, Zhang Xiu and Gu Cheng fought hard, and finally stopped the attack of the Wei army. At that time, Quan Cong's sons Quan Xu and Quan Duan were also generals in the army, and they took advantage of the enemy's being stopped and sent troops to attack, so Wang Ling's army retreated.

Zhu Ran and Sun Lun led 50,000 soldiers to besiege Fancheng, and Zhu Ran used the strategy of Zhu Huan's son Zhu Yi to break through the periphery of Fancheng. At that time, Jingzhou Thorn Shi Hu Zhen sent lightly armed troops to rescue Fancheng, and some people said: "The enemy is strong and cannot be approached." Hu Zhen said: "The walls of Fancheng are low, and the defenders are few, so we should forcibly march as foreign aid, otherwise, Fancheng will be in danger." So he led the army to approach the besieging troops of Wu, and the army in the city was at ease.

In the face of Sun Wu's attack, Sima Yi invited himself to send troops to ask for it. At that time, the courtiers believed that the enemy soldiers were coming from afar to attack the fortifications, and they should be allowed to break themselves, but Sima Yi said: "The border city is invaded by the enemy and the ministers are sitting in the temple, which will make the territory uneasy and the people will be confused, which is a great worry for the community." "In June, Sima Yi led the army to reinforce, Sima Yi knew that the south was hot and humid, and the army should not stay here, so he sent light cavalry to challenge first, and Zhu Ran did not dare to move. So, he recuperated and recuperated. Inspect the elite, recruit warriors, issue orders, and pose for siege. The Wu army was frightened and retreated overnight. At the mouth of Sanzhou (Jing, Henan, and Yang), the Wei army pursued and reached, and the Wu army was annihilated by more than 10,000 people, and the ships and materials suffered a lot of losses. The Wu army, which attacked other regions, also returned in vain.

【Recapture Anhui City】

Historically, Anhui City (recorded as Wancheng in some sources, it should be all miswritten) was once occupied by Sun Wu, and was garrisoned by Zhuge Ke at that time, and the border people thought it was bitter. Sima Yi wanted to lead his troops to attack it, and the speaker thought that Zhuge Ke occupied a strong city, had a wide range of grain and grain, and attacked alone, and the rescue troops would come. Sima Yi said: "What the thief is good at is water warfare, and now I will attack his city to see its changes." If a thief uses his strengths to abandon the city and run away, this is our intended purpose. If the thieves dare to hold on to the city, the lake is shallow in winter, and the boat cannot move, and the rescuers will abandon the ship and save them by land, which will lead to land warfare that they are not good at, which will be beneficial to us. ”

In September of the fourth year of Zhengshi (243), Sima Yi led his army to march. Cao Wei's army arrived in Shucheng, Sun Quan wanted to send troops to respond, but the hopeful said that it was not conducive to sending troops, so he asked Zhuge Ke to move to Chaisang, Zhuge Ke finally burned and accumulated, abandoned the city and left, Anhui City was also recaptured by Sima Yi, and then Sima Yi inspected Huaibei Tuntian District, and promoted Deng Ai, a farmer's son, to preside over Tuntian.