Although Wuguan was conquered, Du Zhen's march on the Wuguan Road was not much smoother because of this.

On the Wuguan Road, he was defeated and retreated, resisting step by step, relying on the complex and narrow terrain of Wuguan Road to block Du Yu step by step, and fought and retreated.

This strategy of Zhan Hong was undoubtedly correct, because the number of troops was smaller than Du Pre, and Zhan Hong took advantage of the terrain as much as possible to avoid a decisive battle with Du Pre. The loss of Wuguan made Xianhong more cautious, and when he retreated to Shang County, he felt that the terrain here was too open and not conducive to defense, so he directly gave up Shangxian and retreated to Shangluo.

Although Du Pre's strength is several times that of Zhan Hong, but the narrow terrain of Wuguan Road makes it impossible for him to exert this advantage at all, Du Pre can only follow Zhan Hong, he took a step back and went further by himself, after capturing Shang County, Zhan Hong built a new defense line in Shangluo, and the two sides fell into a new offensive and defensive battle.

Shangluo is the penultimate pass on the Wuguan Road, the last pass is Lantian, once the Lantian is crossed, Du Pre can enter the vast Guanzhong Plain, seeing that victory is in sight, Du Pre is naturally full of confidence, and launched a fierce attack on the Shu army defenders in Shangluo.

If Shangluo loses again, then only Lantian is left to defend the entire Wuguan Road, so there will be no room for maneuver.

But Du Pre's determination is very great, the offensive is extremely fierce, and Zhan Hong is quite a little difficult to parry, he knows very well that the defenders of Guanzhong are now a radish and a pit, and there is no extra force to help him, the only hope is Liu Yin, who is far away in Hanzhong, but Wuguandao is far away from Hanzhong, and I am afraid that it will not be able to return to help in a short time. Zhan Hong could only rely on Guan Pass to resist desperately, and made preparations to disarm Lantian.

The pressure is high. The pressure of Du Pre is not light, the longer the war in Wuguandao drags on, the more unfavorable it becomes to the Wei army, the terrain of Wuguandao is narrow and long, and tens of thousands of troops squeeze into Wuguandao, as if they were stuffed with sausages. The front has been sealed, and if the back is also sealed, then it will really have to wait for the air to dry.

Therefore, Du Pre did not dare to put all his troops into Wuguan Dao, and left 10,000 horses in Danshui to garrison as a backup, but despite this, Du Pre still sent an eyeliner to Shangyong and Hanzhong to inquire about Liu Yin's movements.

The first thing that came back was a piece of good news, Zhong Hui was not tied up in Shuzhong. Instead, he used the Qiankun Great Movement Technique, ran from Chengdu and other places in western Sichuan to Langzhong and Xuanhan in eastern Sichuan, and opened up the Badong Trail to Shangyong, which finally solved the problem of grain roads.

It can be said that the purpose of Du Pre's trip to respond to the Zhonghui has been achieved, but it is obvious that Du Pre has a greater purpose, that is, to open up Wuguan Road and march into Guanzhong. Now that the Shu army is scattered, it is a good opportunity for him to march into Guanzhong. As long as he can grasp this opportunity, Du Pre can make immortal contributions, which is exactly what Du Pre desires.

The only thing that worries Du is Liu Yin in Hanzhong, judging from Liu Yin's previous methods, this person is best at playing cards that do not follow common sense. If it is an ordinary general, he will return to Guanzhong as soon as possible, and go to Lantian to reinforce Xianhong before Du pre-attacks Lantian to ensure that Guanzhong is not lost.

But Liu Yin's use of soldiers is often known for being unscathed. It was also difficult for Du Pre to guess what Liu Yin's next move would be, and before he got the exact news of Liu Yin for a day, Du Pre was not at peace for a day.

A letter sent by Weixing County Taishou Shenquan made Du Yu's worries come true, Liu Yin really did not return to the military pass, but went straight to Xicheng Shangyong to kill, now Xicheng Shangyong's defense is extremely empty, and he is simply unable to resist Liu Yin's attack, and the loss of Xicheng seems to prove this.

Soon, Shangyong also sent urgent documents, the situation was obviously worse than Du expected, Shangyong Taishou Yang Qi was defeated and killed in Mulan Sai, the entire Shangyong defenders were almost wiped out, and the most dangerous passes in the three eastern counties fell into the hands of Liu Yin, and Shangyong and Fang Ling were in danger.

If Shangyong and other eastern three counties are lost, it is the biggest threat to Du Pre who is in Wuguan Road, although 10,000 horses are reserved in Nanxiang Danshui Du, but Du Pre is very clear that it is very difficult to resist Liu Yin's attack with only these 10,000 horses, and Liu Yin, who won the three eastern counties, is likely to move eastward to attack Nanxiang and cut off Du Pre's way back.

This trick is indeed ruthless enough, that is, he wants to seal Du Pre's army on Wuguan Road, Liu Yin did not simply return to the army to rescue Lantian, but chose to start from the weak point of the Wei army, that is, the three eastern counties. The three eastern counties have not experienced war for a long time, so the garrison here is quite lax, and the defenders' defensive awareness is relatively weak.

The key now is how will General Du respond and withdraw his troops? Du Pre is very unwilling, breaking Wuguan, Keshang County, Du Pre has already attacked Shangluo, and is about to open up the entire Wuguan Road, but this bad news came, traveling a hundred miles and half ninety, Du Pre has paid a great price in attacking Wuguan Road, but now he has to withdraw from Wuguan Road, and all the hard work has come to naught in an instant, which makes it difficult for Du Pre to accept for a while.

"General, the situation is a little bad, Liu Yin has conquered the three eastern counties, and he will definitely attack Nanxiang next, and our army's retreat may not be guaranteed." Shao Yuan said with a worried face. Marching and fighting are logistics, and the back road is copied by others, which is not a good phenomenon.

After hearing the news of the loss of the three eastern counties, the entire Wei army was shocked, everyone knew what this meant, and now the supply of grain and grass materials for attacking Wuguan Road basically had to be transported through Shangyong or Xiangyang, if the back road where Shangyong was cut off, the entire army might be in a desperate situation.

Shao Yuan's concern is also what Du Pre is thinking, Du Pre feels that the burden on his shoulders at this moment seems to have a thousand powers, how to take this Wei army out of the predicament and not be wiped out by Liu Yin is the focus of Du Pre's consideration.

Although all the previous efforts of Du Pre were turned into danger by this withdrawal, Du Pre did not dare to gamble with the survival of tens of thousands of troops, and the abandoned passes and cities may still have a chance to be recaptured, and once the men and horses were damaged, it would not be so easy to recover.

Du Pre's gaze dimmed, looking at Shangluo, who was almost certain to be able to take it down, Du Pre took a deep breath, and gave an order with some helplessness but a firm tone:

"Withdraw!" (To be continued.) )