After becoming a general, Jiang Wei continued to launch three Northern Expeditions, three of which not only failed in vain, but also returned in disastrous defeats twice.

【Duangu Fiasco】

In the eighteenth year of Yanxi (255), after Jiang Wei retired from the army, the Cao Wei court appointed Deng Ai as the general of Anxi, and concurrently served as the captain of Hudongqiang. At this time, most of the Wei army believed that Jiang Wei had exhausted his strength and could not send troops to the north again. Deng Ai doesn't think so. He pointed out: "The defeat of Taoxi can be described as not small, the army's morale is defeated, the warehouses are empty, the people are displaced, and they are almost completely defeated. Now, the enemy has the momentum to take advantage of the victory. And our side is weak, and this is the first reason. The enemy's officers and men are at the same level and their weapons are sharp. And our generals have changed, most of the soldiers are newly replenished, and the armaments are also outdated, which is the second reason. The third reason is that the enemy travels by boat, while we are on foot, and the enemy is at ease. Didao, Longxi, Nan'an, and Qishan, each of which needed garrison troops, concentrated on attacking one city, while our side was divided into four. This is the fourth reason. From Nan'an and Longxi, it is necessary to requisition the grain of the Qiang people, and if you march to Qishan, it will be easy to get grain, which is the fifth reason. The enemy also has cunning schemes, and they will definitely attack. After analyzing the above situation, he asserted that Jiang Wei would still wait for an opportunity to attack and step up preparations for war.

In the nineteenth year of Yanxi (256), after Jiang Wei was promoted to general, he reorganized his troops and horses, sent troops to Zhenxi General Hu Ji on two routes, and agreed to meet in Shangqi. Jiang Wei took the lead in sending troops to Qishan, and when he heard that Deng Ai was prepared, he changed to attack Nan'an from Dongting. Deng Ai led the army to seize Wucheng Mountain and refused to defend it, holding on to it. Jiang Wei saw that the geographical advantage had been lost, and the strong attack could not be overcome, so he crossed the Weishui River and marched eastward that night, and advanced along the mountain road to Shangqi, and the two armies fought in Duangu. Hu Ji did not arrive at the deadline. Deng Ai defeated the Shu army, and the Shu soldiers were scattered, with many dead and wounded. The people of Shu Han complained about Jiang Wei because of this, and Longxi was also restless. Jiang Wei then asked to be demoted to a rear general and become a general.

【Mangshui stalemate】

In the twentieth year of Yanxi (257), Zhuge Dan, the general of Wei Zhengdong, united with Eastern Wu to raise troops against Sima Zhao in Huainan. Sima Zhao transferred troops from Guanzhong to the east to crusade against Zhuge Dan. Jiang Wei, the general of Shu, took the opportunity to attack Wei Qinchuan. At that time, Jiang Wei led tens of thousands of troops out of Luogu and arrived at Shenling. At that time, after a long period of tuntian, Wei accumulated a large amount of military rations on the Great Wall, and the defense was weak. The Anxi general Deng Ai and the Zhengxi general Sima Wang feared that Jiang Wei would attack and seize the Great Wall, and immediately joined forces to defend it. Jiang Weijun entered Mangshui and camped in the mountains. Deng Ai and Sima Wang led the army to build a village near the water. The Shu army challenged many times, but Deng Ai and Sima Wang could not hold out, and the two armies faced off for a long time.

In the following year (258), Jiang Wei heard that Zhuge was defeated and died, so he led his troops back to Chengdu (cheng), and Liu Chan restored Jiang Wei's position as a general.

[Taoyang defeated again]

In the fifth year of Jingyao (262), Jiang Wei raised troops to prepare to attack Wei again, and Liao Hua, the general of the right chariot cavalry, said: "If you don't use the soldiers, you will definitely suffer the consequences, and you are talking about Boyo (Jiang Weizi)." How can you survive if you are outwitted and weaker than the enemy, but you are not satisfied with the use of soldiers? The Book of Songs says, 'I was born neither early nor late, but just in time for this time', which is talking about the present. However, Jiang Wei did not listen and led his troops to attack the Taoyang Realm.

Cao Wei and Deng Ai led their troops to meet the battle. Deng Ai's analysis believes that Jiang Wei's army is on an expedition, the battle line is long, and it is difficult to provide for it, and it is difficult to last. So, he seized the advantageous terrain, set up a position in Hou He east of Taoyang, waited for work, blocked the Shu army, after a fierce battle between the two sides, the Wei army launched a counterattack, the Shu army was defeated and fled, and Jiang Wei retreated to the middle of the river.

According to the record of "Similarities and Differences", Dong Ju, Zhuge Zhan and others believed that Jiang Wei had been fighting for many years and was ineffective, and the people in the country were poor and poor, so they should report to the queen and order Jiang Wei to return, and appoint him as the assassin of Yizhou to take back his military power.

【National Turmoil】

Because Jiang Wei was originally in a foreign country, he did not make meritorious achievements in the war for many years, and the eunuch Huang Hao played with power in the imperial court, and the right general Yan Yu and Huang Hao were embarrassed, and Huang Hao conspired to abolish Jiang Wei and replace him with Yan Yu. Jiang Wei was also suspicious of Huang Hao, so he was quite afraid and did not return to Cheng (cheng) capital.

According to the record of "Huayang National Chronicles", Jiang Wei was disgusted with Huang Hao's unauthorized dictatorship, so he said to the lord of the Han Dynasty: "Huang Hao's treacherous and clever authoritarianism is arbitrary, and he will corrupt the country, please kill him!" Liu Chan, the lord of the Han Dynasty, said: "Huang Hao is just a minister who runs back and forth in front, Dong Yun often hated him in the past, I often regret this, why do you mind him!" Jiang Wei saw that Huang Hao's henchmen were clinging to each other like the branches and leaves of trees, and he was afraid that he would lose his words, so he said a few humble words and came out. Later, the queen of the Han Dynasty asked Huang Hao to go to Jiang Wei to explain and apologize. Jiang Wei became more suspicious and fearful from then on, and after returning from Taoyang, he asked to go to Chengzhong to plant wheat, and did not dare to return to Chengdu to avoid infighting.

In the later period of the Shu Han Dynasty, there was Huang Hao's chaotic government inside, Jiang Wei's defeated army outside, and the two were still full of contradictions, which can be said to be a scene of the country's destruction.

【Discussion of Shu】

In the third year of Wei Jingyuan (262), Sima Zhao was worried about Jiang Wei's repeated attacks and asked to be an assassin to enter Shu to kill Jiang Wei. Sima Zhao agreed with his words. So Sima Zhao prepared a large-scale crusade against Shu Han, but most of the courtiers thought it was impossible, and only Sili Captain Zhong would approve.

Sima Zhao had made up his mind, and he said to the people: "Since the rebellion was put down in Shouchun, the soldiers have not fought for six years, making weapons, repairing armor, and preparing to deal with the two captives of Wu and Shu. If Wu is destroyed, roughly calculated, it will take more than 10,000,000 man-days to build warships and open waterways, which will take 100,000 people and 100 days to complete. In addition, the low terrain and humid climate in the south will inevitably lead to epidemics. Today, we should take Shu first, and after three years of destroying Shu, we should take advantage of the favorable terrain that Bashu can go down the river and advance by land and water, which is just like the Jin Dynasty destroying Yu Dingyu in history, and Qin swallowing Han and Wei as easy. According to statistics, there were 90,000 Shu warriors, and there were no less than 40,000 garrisons in the capital of Cheng and the counties in the rear, and the rest were only 50,000. Now drag Jiang Wei in the middle of the river, so that he can't look east, and then the army will go straight to Luogu, out of its empty land, in order to attack Hanzhong. If the Shu army is in danger of defending the city, its forces will inevitably be scattered and isolated from the end. We can mobilize a large army to break through its cities, send stragglers to occupy the villages, and the Sword Pavilion has no time to defend its danger, and there is no power to protect itself at the juncture. With Liu Chanzhi's mediocrity, the border city outside fell, and the scholars and girls inside were shocked, and its demise was predictable. ”

Deng Ai, the general of the expedition to the west, thought that Shu had no chance to take advantage of the chaos, and repeatedly put forward different opinions. Sima Zhao was worried, and sent the chief bookkeeper to Deng Aijun as Sima, looking for an opportunity to persuade him, and Deng Ai was ordered.

So Wei finally levied 180,000 troops from all directions, so that Deng Ai attacked Jiang Wei from Didao to Yuzhong, Yongzhou Assassin Zhuge Xu set out from Qishan to garrison Wujie, cutting off Jiang Wei's retreat, Zhenxi general Zhong Hui led the former general Li Fu, the conquest of Shu Hu Lie and others to attack Hanzhong from Luogu.

ps:The previous text into (cheng) is often a CD after it is released.,It's not okay to add fewer symbols in the middle.,Here I'll add pinyin directly.,Forgive me.。