After Liu Bei's army was temporarily frustrated in the early morning of April 21st, he tried to attack and capture Chang'an City, and did not take any military action during the day.

In the afternoon, some generals who coordinated the siege tactics just took a quick look around the city to observe the terrain, so as to survey and plan the siege positions.

After all, the soldiers were tired from coming from afar. If they hadn't felt that they had the chance, they wouldn't have just rested for one night and started fighting.

Starting from the 22nd, the troops started construction according to the previous day's plan. The construction will last for five or six days, and it is impossible to engage in military adventures before completion. After all, Chang'an is one of the three highest and thickest cities in the world in this era. As long as there is no internal support, don't talk about fast attacks.

After calming down, Liu Bei and even the generals under his tent gradually understood from a military perspective why Li Jue was so crazy about the bloody purge in Chang'an City, and even ignored the revenge behind him - because Li Jue knew too well that he had done the matter himself, and he relied on Wang Yun's soldiers who sympathized with the Western Liang army to respond.

People are generally wary of the means they rely on for success, and learn from history.

It’s like Li Shimin killed his brother and forced his father to seize the throne, so he was particularly wary of his son Li Chengqian, so Li Chengqian could not succeed. Zhao Guangyi and Zhu Di’s method of taking the throne could not be replicated successfully. This is the same truth.

History will not be repeated simply, and it will always be repaired and modified to make mistakes that are easily avoided on the surface. Li Jue’s repair method is to rather be ungrateful than tolerate everything in the city who may be sympathetic to the emperor and are interested in Liu Bei. In this way, he completely relies on the Hu Hua, the Western Liang Han soldiers who were not in the Han Dynasty, plus the Western Liang Qiang soldiers and the Xianbei soldiers in the north, and at least he could hold the lonely city for a long time.

At least that's what he thinks himself.

Everything is a massacre caused by a chain of suspicion learned from history.

In addition, Li Jue did reward soldiers heavily and sent palace maids to Hu people. Through temptation, Liu Bei's army also discovered that these Hu soldiers were extremely enthusiastic about Li Jue and had a high morale. Therefore, they should be mentally prepared to fight bloody battles with these beasts when the city was broken. They should not underestimate the enemy. "As long as the city gate breaks through the enemy, the morale of the army will collapse and surrender."

The motivation for bloody battles, even though they know that they will die in the end and cannot have foreign aid, can actually be attributed to "going fun in time before death". As long as they live for one day, they can sleep with women who were once qualified to sleep with the emperor. Who doesn't want to fight to the death and try to live for a few more days?

This situation is not unavailable in later war history, but Liu Bei's army has not encountered it before, so it is impossible to imagine-

In fact, even in the early 20th century, there were some stubborn warlords of "Bingzhou" who, in the end, were destined to have no foreign aid, encouraged soldiers to enjoy the pleasures before their deaths to encourage them to defend themselves. And they did stabilize the morale of the army and let the siege troops fight for a long time, and more than 40,000 casualties were killed and killed and killed.

So Gao Shun's test at least helped Liu Bei figure out one problem: this time, we must be mentally prepared to kill 20,000 people! Even if we break open the city gate, the enemy will continue to fight to the death. This is the final battle against the evil fortress, and we cannot expect to be incorporated after defeat.

Those who can be so desperate with Li Jue are almost all outlaws who have escaped the desolate and thieves, otherwise they would not have run from Jingyuan to Chang'an to continue to do it with Li Jue. Those who are not guilty should have fled halfway and returned to the farm. Except for the strong men arrested in Chang'an City, there are no innocent people.

...

The construction of siege equipment and fortifications is carried out in an orderly manner.

The defenders in the city were also watching and investigating the city, and promptly understood the movements of Liu Bei's army.

On the 22nd day, outside the main gates on the east, south, west and west sides of the city, Liu Bei's army began to set up the first floor of rattan long shields 150 steps away from the city wall to cover the crossbow arrows, and then built a counterweight catapult on the spot behind the rattan shield array.

The counterweight trench machine can actually build components in another place first, and then quickly assemble under the city wall. It will be installed in just a few hours and will take less than a few days of construction.

But Liu Bei listened to Li Su's suggestion and deliberately used how Li Juejun had never seen how the counterweight catapult was made. He didn't know this, so he asked Guan Yu to build it on the spot. The purpose was to lure the enemy into thinking that "the future main attack direction of Liu Bei's army must be the city walls and gates near the catapult position."

Anyway, there are more than 80,000 Liu Bei's army outside the city, and more than 30,000 Duan Wei's army can be sent to protect it. There is no need to worry that the 35,000 defenders in the city will leave the city to rush out of the construction position. If Li Jue dares to send troops out of the field to fight, he will destroy more of his vital forces on the plains.

Li Jue did not really have the plan to lure the enemy, or he had no ambitions. It is estimated that Li Jue at this moment was even more discouraged than Lu Bu before Baimen Tower in history. He knew that he definitely had no foreign aid, and just wanted to indulge in extreme lust and spend the last wonderful time of his life in drinking and indulging in love.

Although Li Ru was a little wise, he could only play a role that was smaller than Chen Gong before Baimen Tower in history.

Li Ru is a scholar and has a weak body. Even if he sends many women to him, he can't enjoy it, so he insists on patrolling the city every day.

On the 22nd day, when he first saw the position of the catapult cart repair, he just sneered slightly and did not dare to confirm.

But the next day, I found that the construction progress was quite fast and it was not like a fake. Moreover, several of the positions were not castle cars, but the tower. This made Li Ru firmly believe that Liu Bei's army really planned to attack from these positions-

In fact, the building that started to be built on the first day of the position was the building, but because the piles on the first floor of the wooden tower base were only erected on the first day, the semi-finished product was not high enough and was not significantly higher than the base of the catapult next to it, so it was impossible to see it. The next day, I found that the base of the thing next door was only four meters high, but these building towers were far higher than four meters high, and Li Rucai was completely attracted to the attention.

Li Ru observed carefully for a while and thought to himself: "Is this building a tower? If it is true, it must be attacking these directions. It turns out that Liu Bei was indeed the city guarding facilities destroyed by Wei Jie and Ju Jun in the North Gate, which were not enough to make up for the difficulty of siege caused by the higher walls of the North City, so he decided to choose the more convenient three sides of the east, south and west.

I guess they will attack together at that time to share our defensive forces and prevent our army from leaving more reserves. However, Chang'an is so strong and tall that if you want to attack like this, as long as there are no traitors, it is possible to attack in the first half of the year.

At least there is still a grain reserved in Chang'an City. If you ignore the lives of the people, you will only send food to tens of thousands of soldiers, and you will not be able to finish it for a few years. But this year it has been a severe drought for two months, and I heard that the locusts in early summer have also appeared.

If Liu Bei's army cannot collect autumn grains in July, and then Guanzhong will be hungry all over the world, maybe he will have to withdraw his troops and give up the siege. If that is the case, it is unknown that we can live for one more year."

Thinking of this, Li Ru actually raised a hint of long-term survival. He wanted to immediately understand Liu Bei's army's real siege plan, and then went to discuss with Li Jue to adjust the deployment of defending the city.

However, everything is still unclear, because the building was not built high enough, and the sunken cost invested by Liu Bei was not large enough (although Li Ru did not know the term "sinking cost"), which is not enough to prove that Liu Bei really wanted to use this plan alone, and there was still a little doubt.

Li Ru thought about it and called Li Jin who was following him to patrol the city, and asked, "The height and thickness of the three sides of the east and south sides of the Chang'an city wall should be seven feet high, right? You have a good look, look at the base of the wooden tower that has been built to the second floor opposite. How high is it? Can you see the city? Liu Bei wants to use this kind of thing to observe the defense in the city. Is it a fraud?"

Li Jin didn't understand strategy, but just smiled with kidney deficiency: "The servant has raised me, how can I know whether to cheat or not? However, I can see clearly the building opposite. It is estimated that it is six meters tall, and there may be a few more layers on it.

But I don't think it's useless: in order to avoid arrows, Liu Bei's army built the tower one hundred and fifty steps away from the city wall. How high does it have to be to see the defense behind the city wall? Even if he built fifteen feet high, he would probably only see 150 steps behind the wall, or even further away. If our guards' reserve forces were hidden within 150 steps behind the wall, he wouldn't see it at all. After all, the city wall in Chang'an was too high."

Li Jin's words actually used simple trigonometric functions and similar trigonometric thinking. Although Li Jin did not understand these mathematical principles, at least those who had led soldiers still had common sense in defending the city. Those who understand mathematics used to calculate and knew that Li Jin was right.

There is nothing else, but it looks familiar.

As for worrying that Liu Bei was building a temporary wooden hut that was more than fifteen feet tall, it was impossible. Fifteen feet were actually very dangerous, surpassing the engineering technology of this era.

"Since Liu Bei can't see the defense in the city, it's probably because he's cheating?" Li Ru was puzzled and was very disappointed. He didn't dare to repay Li Jue immediately because he didn't want Liu Bei to be cheating emotionally. He hoped that Liu Bei could let him see through it easily.

Not to mention, hard work pays off. On April 23rd and 24th, Li Ru went to the city to observe the construction of Liu Bei's army's siege construction site. In the end, he really saw some clues - the flaws were found in the site selection of Liu Bei's army's antique building!

Liu Bei's army not only built the Lookout Tower directly opposite the city gate, but also built four Lookout Towers at the two corners of the southeast and southwest corners of Chang'an City, and two were built in a relatively close distance on each corner.

This layout has never appeared in the history of his siege before. Because the tower can be climbed up to observe several miles, no one has built two towers in a row within two or three hundred steps in the past military history, which is too wasteful of vision.

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For readers who can't understand, you can imagine: players who play MOBA games will never insert two real eyes into the same grass, so that you won't waste your real eyes' vision!

If something goes wrong, there will be a demon. Liu Bei's fortifications of the siege are so demonic that it is difficult for Li Ru to not pay attention to it.

After carefully observing the several buildings, she racked her brains to think about it all day, but in the end, Li Ru was able to figure it out and suddenly figured out the mystery.

Li Ru was frightened and sweated: "Liu Bei was building a building to the northeast of the southeast corner of the city wall to look at the defense on the side of the south wall! Then, building a building to the west of the southeast corner of the city wall to look at the defense on the side of the east wall! He was building a building outside the south wall to look at the back of the east wall, and the building outside the east wall to look at the back of the south wall, with a cross-view!

This layout is too exquisite and vicious, and it is used specifically to deal with super giant cities like Chang'an City! In this way, if our army deployed in any of the three gates in the east and south, the reserve force is insufficient, I am afraid that Liu Bei will immediately turn the feint attack of that gate into the main attack! In this way, it would be too difficult for our army to use the enemy's troops to defend the enemy with a small amount of troops without knowing the virtuality and reality of each gate's defenders! Chang'an City is too big!"

Not to mention, Li Ru's vision is really good, and he has seen through the exquisiteness of the new survey rules of the siege position by Li Su and Liu Bei.

In fact, this move has evolved slowly in the East and West, and in the thousands of years of offensive and defensive city games. If it were dynasties such as the Song Dynasty, Ming Dynasty, or cities such as Constantinople in the late Byzantine period in the West, they would choose to build "corner towers" to avoid the cross-view of the siege's siege.

The corner tower is a tall city tower at four corners of the city wall. It must be a large section of the city wall, and it must be much taller than ordinary city walls. In addition to shooting arrows and side-firing fire to strike soldiers at the base of the wall, it is actually more important to "block the external tower on the inside of the city corner to look out for the virtual and real forces behind the city wall next to the wall."

Because if you are purely for shooting arrows, there is no need to build a corner tower, just build a horse face. The corner tower is so prominent and still tall, it is easy to become a target that is more vulnerable to attack and more difficult to defend than the horse face.

Unfortunately, the city at the end of the Han Dynasty, whether it was Chang'an City or Luoyang City, had not yet cultivated a horn tower like a Wanglou from so many offensive and defensive games in all dynasties. Therefore, as long as Liu Bei's building was completed, Li Ru and Li Jue had to endure the disadvantage of Liu Bei's virtual and real reserve teams being seen by Liu Bei in the three walls.

Of course, they could also choose to leave some troops to defend the city gate, which was invisible. But the Han Dynasty's city was not like the Song and Ming dynasties. There were professional repairs to the military cave, so that there were so many people in the gate. And as long as the inner wall was empty, it might attract Liu Bei's army to mistakenly think that it was empty and attacked fiercely, which would be a mistake.

Li Ru figured out the whole principle and was so scared that she immediately went to Li Jue to reveal her worries:

"General! I'm afraid it's not good! Chang'an City is too big, and now it has become a disadvantage for our army to defend the city! Liu Bei's army has a way to see the number of people in our reserve teams in each wall. At that time, we will only pick weak places to attack the city, and we will probably not be able to spread the walls that are twelve to fifteen miles long!"

The circumference of Chang'an City is more than fifty miles long, and each side is more than ten miles long. Forty thousand people are scattered on average, but there are probably less than a thousand people on each mile of the city wall.

"What? Liu Bei had such a strange plan? Quickly adjust the deployment of troops to defend the city!" Li Jue was also slightly shocked, and he immediately stopped even the woman of Emperor Xian of Han in his hand.

At this point, they have made up for sure that Liu Bei will find the weakest point in attacking from the three walls on the southeast and west sides.

Who made Li Su always make fakes so seriously and willing to make a lot of money by making fakes? He would not hesitate to make a real invention to make fakes. It would be difficult for the enemy to avoid being deceived.

(Note: Book friends who cannot understand the principle of cross-view and blocking the view of the corner tower, please see the schematic diagram of the Easter Egg Chapter on the next page.
Chapter completed!