When he reached the level of a military strategist of Sima Yi, as long as he found a clue and followed this clue to think, it was easy for Sima Yi to find the truth of the matter.

Obviously, this is the two countries of Wu and Shu uniting again, acting in a play together, and deceiving Dawei.

From this point of view, then General Cao Zhen's strategy of thinking that Wu and Shu were fighting each other and could take advantage of the situation to launch an attack to recover Guanzhong was based on wrong intelligence from the beginning.

Although doing so, it may indeed have caught the Shu thieves off guard, but the Shu thieves may have been arranging the relevant matters of the Northern Expedition, although they were unprepared for a while, and were given an advantage by General Cao Zhen, but as time went by, the Northern Expedition armies of the Shu thieves were in place one after another, and the real danger was the counterattack into the Great Wei soldiers who entered Guanzhong.

Not to mention anything else, Guo Huai has been pitted and can only retreat to the fortress group, no one answers, and he can't even retreat to Wuguan.

In this case, how can you make Sima Yi believe that General Cao Zhen can continue to win like this in Zuo Fengyi?!

This is just looking at the entire Guanzhong strategy from the perspective of the Shu thief, if you look at it from the perspective of the Eastern Wu rats. Zhou Yu is standing still in Jiangxia now, what kind of moth is he doing?!

I don't believe it when I kill Sima Yi, Zhou Yu is waiting for Guan Yu to evacuate Jingzhou's troops, so that he can sneak attack Jingzhou Guan Yu is not a fool, if it is really a hostile relationship between the two families, Guan Yu can be so relieved and bold to draw troops north? !

Therefore, Sima Yi now suspects that Zhou Yu's 30,000 Eastern Wu soldiers in Jiangxia are just a cover, and their real purpose is probably not in Jingzhou.

As for the current distribution of power in Eastern Wu, if their target is not Jingzhou, then there is only one possibility - Yuzhou, or Pengcheng.

Sun 100,000 has no interest, and he won't think about fighting Jiaozhou Shixie to decide who will be the assassin of Jiaozhou, right?!

Besides, although the current Shixie does not nominally belong to Eastern Wu, in fact, it is no different from the vassal of Eastern Wu, how could Sun 100,000 send troops to attack Jiaozhou for a nominal matter.

Therefore, the real purpose of Soochow is not Runan, but Pengcheng.

But. It doesn't seem that easy, does it?!

And in Pengcheng, there is Jia Kui to defend it, and Jia Kui has most of Yanzhou's support behind him, so many years Dongwu has not been able to break through, so in a short period of time, Dongwu is even more impossible to break.

As for Runan Cao Xiu, although he is a little impatient, he is also an excellent clan general, and he still has the ability, he has guarded Runan for many years, has geographical advantages, and has Xuchang Wang Ling as a response, so it should not be a big problem.

For a while, although Sima Yi couldn't see clearly where the focus of Dongwu's attack was, it was most likely Qingxu or Yuzhou, although he felt that the problem in Dawei's defense was not big, but he still had to do a reminder.

Therefore, Sima Yi immediately played the Son of Heaven, sent his speculation to Luoyang on a fast horse, informed Cao Ei, and then suggested that Cao Ei issue an order, ordering Jia Kui and Cao Xiu to strengthen their vigilance, so that the general Cao Zhen could withdraw the siege and return to the army at the right time and stick to Tongguan as the top.

Guanzhong can not be taken, but Tongguan cannot be lost.

One thing to say, what Sima Yi is most worried about now is Cao Zhen.

Cao Zhenke took 20,000 central forbidden troops, 30,000 Sili county soldiers, and 20,000 Great Wei cavalry led by Niu Jin to help. If these people were blocked in Guanzhong, then the losses of Great Wei would be too great.

Therefore, Sima Yi hurriedly sent a warning to Luoyang, and at the same time wrote a letter to Guo Huai, asking Guo Huai to hold on for a period of time and wait for reinforcements from the Son of Heaven in Luoyang. I really can't spare my hands to rescue him.

After all, Sima Yi is not having a good time, facing the siege of 90,000 Shu thieves, Wancheng needs reinforcements, where is the ability to divide troops.

And when Sima Yi's letter was sent to Luoyang after another seven days, Cao Rong had already started to have a toothache.

This Sima Yi, since he has seen the signs, he should send it to you with the last sparse performance, and now he will send it to take care of a.

Don't talk about it in Soochow. Our general Cao Zhen has now been outflanked by the Shu thieves, and has experienced a big defeat, how many soldiers can withdraw to Tongguan, and even whether Tongguan can be defended, is now unknown.

In short, you Sima Yi said it was too late!!

Let's talk about this, I have to go back a little bit to the timeline, back to when Guo Huai encountered the counterattack of the Northern Army of the Han Dynasty in Youfufeng.

At about the same time, Cao Zhen's situation in Zuo Fengyi also began to deteriorate sharply.

In fact, it went very smoothly at the beginning.

Cao Zhen's hesitant march in the early stage attracted Zhang Xi to take the initiative to advance the army, and finally attracted Zhang Xi to the outside of Dali County.

If Zhang Xi can be lured to take the initiative to attack the city, so as to give the cavalry led by Niu Jin the opportunity to attack on the flank, with the advantage of cavalry over infantry, this is likely to be a defeat battle, Cao Zhen is very likely to fight Zuo Feng Yi, and then directly approach Chang'an and recover Guanzhong.

But that Zhang Yuanchang was not easy to mess with in the end, just like suddenly realizing his combat intentions, he suddenly led the troops to retreat, wanting to shrink the supply line, retreat to Changling, and rely on the city defense of Changling and Chang'an.

Of course, Cao Zhen couldn't give Zhang Xi this opportunity, so his attack this time was quite decisive, and he didn't make any mistakes in command, and finally trapped Zhang Xi in Chongquan County, and at the same time, he also let Niu Jin, who came to help, completely cut off Zhang Xi's logistics supply line with the advantage of cavalry.

According to Cao Zhen's prediction, even if he did not take the initiative to attack Chongquan, as long as he besieged Chongquan County for a month or two, and when the food in the city ran out, the entire Yongzhou army of Shu thieves would lose its combat effectiveness due to lack of food, and finally had to surrender.

However, Cao Zhen still recognized Zhang Xi very much, and always felt that he would not do anything in such a siege, and if he didn't do it, Zhang Xi would find some loopholes and lead his troops out, so Cao Zhen did not have any carelessness on the enemy, and immediately launched an attack on Chongquan County after preparing for the siege.

Breaking through Chongquan County one day earlier and defeating the main force of the Shu thieves in Yongzhou will be at ease for Cao Zhen one day earlier.

There is one thing to say, it is really not wrong for Cao to really deal with it, but the problem is. Just as Guo Huai miscalculated the time of the Northern Han Army's reinforcements, Cao Zhen also mistakenly believed that there could be no reinforcements in the short term.

In other words, Cao Zhen didn't think that if the Shu thieves had reinforcements coming, they would pose any threat to themselves.

It's really not that Cao Zhen was a little floating after besieging Zhang Xi, in fact, Cao Zhen is quite calm.

Unlike Guo Huai's army that attacked Youfufeng, Cao Zhen's side really gathered the main Wei army in the Sili area, and it was much stronger than Guo Huai in terms of strength and combat strength.

20,000 Central Forbidden Army, 30,000 Sili Forbidden Army, 5,000 Headquarters Cavalry, plus 15,000 Elite Cavalry Regiment Aided by Niu Jin, a total of 70,000 people.

The main force of the Shu thief Yongzhou army on the opposite side is only more than 20,000 people, and the only Changling County defender who can support Chongquan is only more than 5,000 people, and the total is only 30,000 people.

Cao Zhen did not divide his troops to fight Changling, which was already out of cautious considerations.

In such a situation, even if the Shu thief has reinforcements, even if 30,000 reinforcements arrive, his total strength is still higher than the total strength of the Shu thief.

More importantly, Cao Zhen had a full 20,000 cavalry.

On the Guanzhong Plain, the importance of 20,000 cavalry is not comparable to that of 20,000 infantry.

Therefore, Cao Zhenzhen is not worried that there will be reinforcements when Zhang Xi is trapped in Chongquan County, or rather, Cao Zhen still has some expectations, if the Shu thieves really have reinforcements coming, he really doesn't mind playing a siege point to send reinforcements.

Then, Cao Zhen suffered similar treatment to Zhang Xi, and let the cavalry led by Zhao Yun go straight to Dali County, his rear, cutting off his grain and grass supply channel.

Cao Zhen made the same mistake as Guo Huai here, he didn't have the habit of sending scouts behind him, and Zhao Yun also relied on the speed of the cavalry, went around in a big circle, bypassed the scout reconnaissance on Cao Zhen's flank, and ran to the vicinity of Dali County behind Cao Zhen.

Plus. That is Zhao Yun, although low-key, but still ranked among the "Five Tiger Generals" Zhao Yun.

As the first person to actually be the cavalry commander of the Han Dynasty after Ma Chao, Zhao Yun has his own understanding of the use of cavalry.

Coupled with Zhao Yun's strategy, it is not comparable to a reckless man like Ma Chao.

When Zhao Yun went around in a big circle and ran to the vicinity of Dali County, he did not immediately show up with great fanfare, forcing Cao Zhen to return to the army.

He only sent 3,000 cavalry to attack the grain transport team that Cao Zhen sent from Dali County to the front line in Chongquan County.

On the border of Guanzhong, the speed advantage of the cavalry was too great, and Cao Zhen could not have the luxury of using cavalry to protect the grain transportation team, so it was easy for Zhao Yun to successfully attack Cao Wei's grain transportation team several times.

And when Cao Zhen learned that there were three thousand cavalry on his back road, although he was surprised, he didn't care too much. The cavalry team he has at hand adds up to 20,000 people, which is Cao Zhen's confidence.

Moreover, until now, Cao Zhen has not seen the Shu thief cavalry. In Cao Zhen's opinion, the Shu thieves in the Yongzhou territory can't all be infantry, and they don't even have a cavalry team, right? !

Even if the Shu thieves lack war horses, it takes time to train cavalry, but the Shu thieves have occupied Liangzhou for a long time, and in such a large area as Yongzhou, it shouldn't be difficult to build a team of 3,000 rangers, right? !

The rangers are not heavy cavalry, and the training requirements for the cavalry are not high, so it is not difficult to get out.

Therefore, Cao Zhen subconsciously thought that this cavalry team was the Yongzhou rangers released by Zhang Xi to threaten his grain route, and he did not think about it from the Liangzhou army.

After all, the distance between Liangzhou and Yongzhou is still relatively far, even if it is counted from the beginning of its siege of Chongquan County, now the Liangzhou Army has just learned the news at most, and wants to come to help, from the whole army, arranging logistics supplies to departure, plus the time of marching on the road, the overall sum will be at least twenty days to a month.

And this time is enough for Cao Zhen to break through Zhang Xi and besiege Chang'an.

Therefore, Cao Zhen's response to the cavalry behind him was only to ask Niu Jin to send 5,000 cavalry to encircle and suppress this team of rangers scattered by Shu thieves.

In Cao Zhen's opinion, five thousand against three thousand, he is not a light enemy in any case.

And then bar. The 5,000 cavalry sent by Niu Jin were besieged by Zhao Yun's 7,000 cavalry and retreated to Chongquan County in embarrassment.

And at this time, Cao Zhen finally understood that the scale of the cavalry behind him was not 3,000, but nearly 10,000.

This means that the Liangzhou Legion, at least half a month earlier than he expected, entered Yongzhou.

That's not a good thing!!

(End of chapter)