After Chen Tai stated his views to Deng Ai and the others, he immediately took action and led the people and horses to set off. They marched quietly along the way, first crossing the Gaocheng Ridge in Shouyang County, and rushing to a high mountain on the southeast side of Didao City that night. Chen Tai ordered that a lot of beacons be lit and that everyone beat the war drums together, and for a time the flames soared into the sky and the drums soared into the sky.
Chen Tai did this for two reasons. One is to show the Wei army trapped in Di Dao City, the reinforcements have come, hope is at hand, you must lift your spirits and defend the city well; the other is also to show Jiang Wei, telling the Shu army that the reinforcements of the Wei state are coming, and they are coming unexpectedly.
What's going on? It turned out that as early as when the Wei army's rescue troops were assembled at Longyou, Jiang Wei had received the news, he knew that the Wei army would definitely send reinforcements, and through inquiry, he learned that Chen Tai was planning to march from the south road, so he set up an ambush on the south road. The result was good, it turned out that the matter of the south road march was deliberately released by Chen Tai, and the Shu army ambushed for three days, but when it came and went, the Wei army had already rushed to the outside of Di Dao City.
In addition to the ambush miscalculation, there was another thing that Jiang Wei did not expect, he originally thought that as a general of the Western Expedition, Chen Tai commanded the troops to rescue his subordinates, and he would definitely gather all the people and horses from all sides before sending troops, but he did not expect that Chen Tai did not take the usual road and rushed over first. This also means that these two possibilities, one is that there have been new changes outside of their own calculations, and the other is that for the siege of Di Dao City, it is basically a conspiracy of Wei Jun, perhaps waiting to calculate themselves.
No matter which of the above two situations had occurred, it was already beyond Jiang Wei's control, so the Shu army was shocked up and down, and even caused a certain degree of panic. But in any case, Jiang Wei was also a veteran who had led troops in the Shu Kingdom for more than twenty years, he calmed down, stabilized his mentality, and made an ultimate judgment, that is, to put down Didao City and bypass the mountain peaks with the whole army to engage Chen Tai's army. One was fully prepared, the other was helpless to attack, after a battle between the two sides, the Shu army was still slightly inferior, after eating a defeat, Jiang Wei led the troops back to the camp.
At this time, the Wei army in Liangzhou also rushed to the direction of Di DaoCheng, and they had already rushed from Jincheng Pass to Wogansaka. Estimating the number of people who could launch a general attack, Chen Tai had the bottom in mind, and he sent someone to secretly communicate with Wang Jing in Di Dao City, and agreed on a time with each other to prepare to send troops together to attack the Shu army from the direction where Jiang Wei might retreat.
Perhaps this secret correspondence between Chen Tai and Wang Jing itself is not very secret, because Jiang Wei got this news in time, and the Shu army at this time no longer has the vigor it had when it had just defeated Wang Jing, and even after the arrival of Chen Tai's Wei army, it had just been beaten with a stick, and when he heard that the three-way army was going to besiege himself, Jiang Wei felt that there was really no need to hold on any longer, so he quickly retreated, and the garrison was in Zhongti.
Although he suffered a defeat outside Ofdau City, on the whole, Jiang Wei's Northern Expedition was still more successful than ever, and if he had not met such a top-level opponent as Chen Tai, perhaps Jiang Wei would have been able to make some big moves. So in the spring of the following year, in 256 AD, Liu Chan ordered Jiang Wei to be promoted to the rank of general.
With the recognition and encouragement of the emperor, Jiang Wei's heart was more confident, with the presiding over the Northern Expedition again and again, Jiang Wei accumulated a lot of experience, he found that he could always learn from the previous failure, and then make up for the shortcomings in the next attack, achieve greater victories, in order to realize the ideal of life as soon as possible, he decided to go north again.
In the same year as a great general, Jiang Wei's northern expedition began again. Having learned the lessons learned from the last time outside Di Dao City, Jiang Wei may have felt that the strength of his previous Northern Expeditions was still somewhat weak, and once he encountered a strong frontal opponent, he could not confront others at all, so this Time the Northern Expedition he took the Zhenxi general Hu Ji with him, planning that the two men would send troops in two ways, and then meet outside Shangyi City.
For Jiang Wei's Northern Expedition, in fact, Wei Guo had already made preparations, and the first to propose to guard against Jiang Wei was Deng Ai, who disagreed with Chen Tai the previous year.
After the siege of Di Dao was lifted, the State of Wei appointed Deng Ai as the general of Anxi and concurrently served as a lieutenant of the Eastern Qiang. At this time, many Wei generals believed that in the last Northern Expedition, Jiang Wei had already done his best, and in the end he was beaten away by the Wei army, and it was unlikely that he would send troops to the north again, but Deng Ai did not see it that way, and he also had his own views.
Long before the siege of Di Dao, Jiang Wei fought a smooth ride, especially the defeat of our army in the Taoxi area, heavy losses, the collapse of the army's morale, the empty warehouse, and the displacement of the people, which can be said to be a complete defeat, all of which added psychological advantages to the Shu army, and they had the momentum of taking advantage of the victory to pursue.
There is also a more important point, the Shu army's Northern Expedition has four attack points, namely Di Dao, Longxi, Nan'an, Qishan, as a defensive side, these places we have to send troops to garrison, and the Shu army only need to concentrate on attacking one place on the line, from this point of view, it is also conducive to the Shu army's attack.
Moreover, if the Shu army marched from Nan'an and Longxi, it could collect grain from the Qiang people, and if it marched from Qishan, there would be a sufficient supply of grain for thousands of miles.
With the momentum of the previous victory, the offensive has the advantage of concentrating troops, and there is no need to worry about grain and grass, Jiang Wei will definitely find an opportunity to attack, so we still have to step up preparations.