I have to admit that before personally arriving at Yangping Pass to reconnoiter the terrain, Li Su always had an inertial thinking in his heart, that is, he mistakenly thought that Yangping Pass was a gateway to block the northern army from entering Sichuan.

In this case, Yangping Pass should be in the middle of the road along Chencang Road and Qishan Road to this time, directly across the middle of the road, rampant and domineering to cut off all contacts, anyone who wants to go south must pass through the gate of this pass, it is possible to enter Sichuan.

But after seeing it in person at this moment, he found that this is not the case, the road is now in a herringbone fork, Yangping Pass is at the tip of this herringbone, the road from the northwest will pass through the front of the pass, and the road from the southeast will also pass through the front of the pass.

But as long as you don't want to enter Hanzhong, you just pass by, and Yangping Pass will not hinder you at all - this is just a gateway to Hanzhong, and it does not affect passers-by who are purely passing by.

"But why is Yangpingguan standing in this place? Doesn't this leave a gap for people who are smuggled south? Li Su couldn't help but think in his heart.

But he quickly reacted - this is because the ancients who built Yangpingguan did not know where the threat to guard against came from, and whether the enemy was coming from the south or from the north.

Because you must know that in the pre-Qin period, the Qin State took Hanzhong early, and then took Bashu, which means that at that time, Hanzhong and Guanzhong in the north were one, not with Shu County and Ba County in the south.

If Yangping Pass is built on the one from the north of the herringbone, it is convenient to guard against the enemy in the pass, but when Bashu comes to the enemy, it will have no defensive effect. In the same way, if you cultivate to the herringbone, you can prevent the enemy from the south, but you can't prevent the enemy from the north.

Looking at the geographical situation in front of him and thinking about it together, Li Su's heart finally brightened: "It was my negligence!" I should have thought of it a long time ago. In history, it was not only Cao Cao who destroyed Zhang Luzhong and Shu Han, but also needed to attack Yangping Pass. When Liu Bei and Cao Cao fought the battle of Hanzhong, Liu Bei came from the south, didn't he also attack Yangping Pass!

It was after the Yangping Pass was broken from the south that there was a follow-up battle of Dingjun Mountain to kill Xiahou Yuan. Since the south and the north have to fight Yangping Pass, Yangping Pass, of course, is only to provide defense for Hanzhong and supplemented by defense for Shu Dao. ”

In fact, later in history, with the formation of the confrontation pattern of "Hanzhong and Shu County", the Shu Han regime set up another checkpoint south of Yangping Pass, called "Yang'an Pass".

Later, it was falsely passed down by successive dynasties, and in modern times, the place name of "Yang'anguan" was "Yangpingguan Town", which was used until the 21st century. And the real Yangping Pass is called "Ancient Yangping Pass".

……

After understanding all the geographical causes and effects, Li Su had a question in his heart, so he discussed with Liu Bei and Lu Su in a discussion tone:

"Brother, Zijing, do you think that since Yangping Pass has not cut off the road to Sichuan, if there is a war between the warlords of Guanzhong and Yizhou in the future, is it possible for the army from the north to bypass Yangping Pass without entering, and directly attack the hinterland of Yizhou in the south?"

Li Su asked this question casually, and said whatever he wanted.

Liu Bei laughed directly when he heard this: "How is it possible, it is far away to go to Shu County, even if you smuggle through Yangping Pass, you can still smuggle through Baishui Pass and Sword Pavilion?" Stealing is impossible to become a big thing, and it must be fought steadily one by one.

Otherwise, after the army, the defenders in Yangping Pass only need to go out for a few miles, cut off your return route and grain road, and the army from the north will not be able to advance or retreat whether it is blocked in Ma Mingge Road or Sword Pavilion Road. There is only a plank road under your feet, and you will naturally starve to death when you run out of food. ”

Li Su also reacted quickly, this question was asked urgently, and with his IQ, he wouldn't ask if he thought about it for a few more seconds.

He laughed self-deprecatingly and embarrassedly for a few seconds, but soon thought of another possibility: "Eh! Wait, but if the army needs to secure the grain route and can't sneak through, then the small group of men and horses is just to enter the Sichuan, then it can always be successful, right? ”

Liu Bei and Lu Su did not answer immediately, but carefully observed the topography of the road in front of the pass, and then nodded and admitted: "The wall is far from the fork in the road from the north to the south, and there are two miles of land recently, and the merchant group of hundreds of people has stolen it, but it is no problem." ”

Li Su's brain was running rapidly, and he desperately leaned on the angle of "how to lure the enemy out of the pass and annihilate him", racked his brains and thought about it for a long time, his hair fell out a little, and suddenly he had a flash of inspiration, and he integrated all the prerequisites.

"I've got it! I have a way to lure Zhang Wei's main guard out of the pass to fight us! ”

Liu Bei and Lu Su suddenly stood up and looked at Li Su with incredible eyes:? Can it all be done?

How can this be deceived, can Zhang Wei be deceived into Alzheimer's disease with cerebral thrombosis?

Liu Bei was stunned for a while before coming back to his senses, and hurriedly held Li Su's hands: "Brother Xian, come quickly!" ”

Li Su pointed to the road in front of the pass: "Your Majesty, this time, give you my mission, it is different, Your Majesty asked my brother to destroy the rice thief Zhang Lu and pacify Hanzhong, and ordered me to spy on Liu Yan's true intentions, and wait for Zhang Lu to calm down and restore the Han envoy to beat Liu Yan."

In this case, we can first reverse the order of tasks: the mission of attacking Zhang Lu is kept secret first, don't show any signs, and pretend that my brother's army is all in the direction and deal with Han Sui in a roundabout way.

And I reprimanded Liu Yan with the title of Zhonglang and the festival into Sichuan. I can take 500 guards with me, or 1,000 guards, and pass in front of Yangping Pass at night, pretending to go straight to Ma Mingge Road to Baishui Pass.

As we all know, Baishuiguan and the area around Zitong are not areas where rice thieves are causing trouble, but areas that are weathered and good under Liu Yan's rule. Therefore, as long as I can sneak away to Baishui Pass, Liu Yan will never dare to kill me again.

Because as long as I die in Baishuiguan and even further south, the nature will change, and Liu Yan will no longer be hiding and killing the Han envoys through Zhang Lu, but he will personally pull the flag against the Han! Now that His Majesty is still here, does Liu Yan dare to risk the condemnation of the world?

Even if Liu Yan wanted to kill me secretly, couldn't I sneak back to my mission of thousands of people? As long as there is a living mouth back to Luoyang, Liu Yan is the number one thief in the world. Therefore, as long as Liu Yan is not stupid, he must have repeatedly instructed Zhang Lu to kill the Han envoy in the occupied area before he reached Baishui Pass, so that even if there are deputy envoys, servants, and guards of the mission who escape back to the north over the mountains and mountains, they will not be able to blame Liu Yan for the killing of the envoy! ”

Before Li Su and Liu Bei went south, Emperor Ling of Han actually sent two groups of envoys to inquire about the situation in Yizhou, but they were killed on Zhang Lu's territory before they could reach Liu Yan's direct control area.

But every time, in fact, there were armed guards in the mission who escaped back alive, and the reason why they couldn't bite Liu Yan was because Liu Yan chose too well the geographical location where he committed the crime, and he didn't show any flaws, and he used a knife to kill people seamlessly.

Liu Yan is good at acting, and Li Su is better at acting than him!

I also pretended to be sure that "as long as I enter the area directly controlled by Liu Yan, Liu Yan will not dare to kill me", so I learned the lesson of the first two groups of killed envoys and smuggled through Yangping Pass!

And the embassy of about 1,000 people does not need to consider the problem of retreat and grain routes, and after Zhang Wei found out that Li Su had passed, he cut off the road in front of the border and set up additional camps and cards, which was useless at all.

Such a little food can be brought with you, and you can also show the imperial court to collect food along the way, let the local government and people supply it, and even directly pay for food to eat.

When Li Su said this, Liu Bei was still pondering along this line of thought, and Lu Su had already reacted.

Lu Su clapped his hands and exclaimed: "If this is the case, wouldn't Zhang Wei have to send troops to pursue Zhonglang frantically, in order to intercept and kill you before Zhonglang escapes from Ma Mingge Road!" Therefore, Zhang Wei's main force had to take the initiative to go out to fight! ”

Knowing that there were large armies more than 100 miles away from the northwest that were eyeing him all the time, Zhang Wei did not perceive any risk of tackling key military problems, and of course he did not dare to bear the responsibility of "accidentally letting the mission sneak over from the front of the pass", and he definitely wanted to make up for his mistakes!

After Zhang Wei frantically pursued Li Su to Ma Mingge Daoli, Liu Bei led the army from the northwest and marched to the bottom of Yangping Pass, blocking Zhang Wei's retreat to the pass!

Then Zhang Wei was sandwiched by Li Su and Liu Bei in Ma Mingge Road, and it was Zhang Wei's turn to be sandwiched into a mille-feuille.

However, there are dilemmas in the implementation of this plan.

First of all, Liu Bei insisted on the current secrecy measures and did not let Zhang Wei be alerted to the fact that there was a large army hundreds of miles away in the north, and he had to make sure that he would march in a hurry at that time, and before Zhang Wei reacted, he would rush 150 miles from Hechi to Yangping Pass to sneak attack!

Secondly, Li Su is used as a bait, he can't bring too many soldiers around him, he must be in line with the identity of the mission, too many soldiers will scare the enemy away, too few soldiers are easy to make the enemy support, feel that a few thousand people can be annihilated, and can not lure out too many guards.

In this way, the danger of Li Su's decoy is also quite great, if the troops around him are not elite enough, they can't support Liu Bei's army to intercept Zhang Wei's back road, and Li Su will be killed by Zhang Wei.

And even if Liu Bei intercepted it in place, in case Zhang Wei felt that the net had been broken, and he wanted to kill Li Su, the culprit who deceived him so badly, before he died, it was possible that the dog would jump over the wall and attack wildly, pull Li Su's back and end up together.

"This ...... This strategy is too dangerous, how can you let the virtuous brother pretend to be an envoy and go deep behind enemy lines as bait. It's just a Yangping Pass, it's a big deal for us to attack slowly, and we can fill it up with soldiers......"

Liu Bei was still a little unbearable, he couldn't let his buddies take risks, he knew that Li Su had no martial arts.

Li Su persuaded: "Brother, don't worry, it's a big deal that my retinue of a thousand envoys will pick the elite of the army, everyone will wear armor, and send a few more fierce generals to protect me." At that time, even if Zhang Wei is really crazy, the army will chase me, and I will not be able to escape from the mountain with a few people? If you attack Yangping Pass in a normal way, you may not be able to attack it in a few years. ”

Liu Bei struggled in pain for a while, and sighed: "In this case, let Zilong select a thousand cavalry, and everyone will escort the virtuous brother in iron armor, and Dian Wei and Zhou Tai will all follow." Alas, it's a pity that Ziyi is in Donglai, Yide is injured again, and Yun Chang has to lead the main force with me to tackle key problems.

If Zhang Wei chased and killed the virtuous brother really fiercely, it didn't matter if he abandoned the army and fled with a few henchmen at that time, although these thousand elite soldiers were also precious, they were nothing in comparison. I'll change the best horse for my brother Xian, ......"

"Don't! Don't! The most important thing is that the horse still has to be ridden smoothly! "Rao is Li Su is not superstitious, and he almost scared out when he heard this.

If Liu Bei is allowed to send him a horse, wouldn't he become the Flegg of Pang Tong, it would be too unlucky!

You can't say yes!

Li Su not only refused to change horses, but also secretly thought in his heart: "When the time comes, if you really go behind the enemy to be a bait, you must let Dian Wei Zhoutai stay left and right for half a step, and then let Zhao Yun go out to explore the way, you must see clearly whether the terrain on both sides is easy to be ambushed, and you can't miss a word on the cliff." Anyway, Luofengpo is not here. ”