Tuo Yi and Zhang Liao were delayed for several days by gathering troops and "trying to surround Wei and save Zhao". Of course, Guan Yu and Xu Huang would not waste this time difference in vain.

Yang Chou had only 5,000 troops in Yewang City, and Xu Huang, Guan Yu, outside the city, had 30,000 troops. Moreover, Guan Yu's troops were elite soldiers who had been fighting for many years. It was necessary to crush Yang Chou in terms of combat power, but it was just the speed of the capture.

Because of the vast territory of Liu Bei's camp, the proportion of mountainous areas is extremely high, and the logistics distance required for the mobilization of military supplies is very long. Therefore, for many years, they have been taking the elite soldiers route and spending money and food on training and equipment in the rear. In wartime, they must exert the same combat power level. If there are few people in the front, the logistics pressure will be low. Guan Yu has 30,000 people to withstand Yuan Shao's camp.

On November 14th, Guan Yu was still building siege weapons while guarding against enemy reinforcements. But he didn't respond all day, and he knew that Tuo Yi would definitely not come in three or four days, so he focused his efforts to prepare for a desperate attack.

From Huai County to Ye Wang, if Kuo Yi sends troops, he will definitely arrive in two days and enter Guan Yu's scout investigation scope in one day. There is no news now, which means that he has not sent troops.

Guan Yu had not waited until the 16th, and all the first batch of siege weapons were completed. On the 15th, he just took the first three or five lever counterweight trenchers that had just been built. He wanted to start fire preparations directly, and asked the soldiers to use eight rushing cars and countless flight ladders to try to attack the city.

The rushing car was equipped with eight vehicles, which was planned to attack the city gates on all sides at the same time, so that Yang Chou would not give him a chance to breathe, and forcing him to send troops to defend the four gates, which would inevitably be stretched. Each city gate had a genuine spare vehicle, and it would still be able to hold on if it was smashed by the stones thrown from the city.

At the morning of the morning, the trenchers began to throw stones sparsely, and next to the trenchers that had already started to fire, there were more unfinished wooden shelves, which would take a day or two to open fire. There was no one else in this scene of magical realism.

Rows of Han military axe and shield soldiers rushed forward with arrows and stones, and climbed the ladder toward the weak position of the rammed earth in the female wall, which had collapsed and had a weak defense. The sound of killing was shocking.

Yang Chou at the top of the city commanded the troops to defend the enemy. One after another, Yuan army reserve teams went to the wall to block the leaks, and leaned on the benefits of bows and crossbows and wooden stones to suppress the Han army's deaths first.

"Replace the gravel bomb! Force the crossbowman on the top of the city! Hurry up, just take advantage of our people just now retreating, and you won't hurt your own people by chance! If you slow down, they will retreat to find a place to hide!"

Guan Yu saw that his attack was temporarily repelled, and the last dozens of dead soldiers who rushed the farthest on the ladder were either injured by wood and stone, or fell down from the gap in the armor, and quickly commanded his long-range firepower to suppress it immediately.

As the Grand Marshal, Guan Yu is no longer on the front line to command these tactical things. He is only responsible for supervising war and dispatching troops. Today, because the situation is really critical, he has to seize time to return to his old career.

This intensity of time grabbing Guan Yu once had an illusion that he seemed to have returned to the winter nine years ago, when his elder brother was just the newly enthroned prefect of Hanzhong that court.

Boya and Zilong used tricks to lure Zhang Wei's main force out of Yangping Pass to annihilate. He would need to break through Yangping Pass within three days at any cost. If he could not do it, the reinforcements sent by Zhang Lu from Nanzheng would arrive at Yangping Pass.

The same is true today. If the Wild King is not defeated within three days, Que Yi, Zhang Liao and Wen Chou will arrive at any time.

Of course, the crossbowmen and the catapults' troops did not dare to neglect the direct micro-operation instructions of the Taiwei, and they strictly implemented them all.

However, Guan Yu's brows were always frowning deeply. The firepower density in front of him could not satisfy him at all. He probably didn't even hit many Yuan Jun archers on the wall. Perhaps after killing a hundred people, they all hid in the sputtering dead corner behind Duan.

"Why is it so slow to shoot arrows and throw stones? How much does it cost to climb the death warriors ahead to force Yang Chou's archer reserve team to the wall? You just missed the opportunity!"

Guan Yu was furious and couldn't help but scold the responsible officer.

Yin Guan, the military officer who was responsible for the supervision of the siege weapons, waited for him to rest and helped explain: "The Grand Marshal, there are too few throwing cars, and he can't throw too many gravel bombs in succession.

This time, the crossbowmen of our army came again because they crossed the mountains. They were no longer fighting in plains. They were not wearing forged steel breastplates, but were all leather armor. They dared not get too close to the city wall and shoot against the defenders.

It is mainly based on the divine arm crossbow that Zhuge Changshi just invented this year. With the advantage of shooting range, it is sparse. The Taiwei insisted that all ordinary crossbowmen lined up to the front and shot the wall. It is better to build more rattan long shields, push them to the front of the formation in the afternoon to cover the arrows and stones, and then the crossbowmen fired arrows behind the wooden barriers."

The long shield used for siege is familiar to those who have watched costume dramas. It is the kind of arrow used in the RTS game "Fortress" series that covers the siege crossbowmen's arrows to guard the city.

This thing was often used by Liu Bei's camp, but firstly, this long-distance raid was not brought, and secondly, the northern battles were not like the vines in Jingyi Land, with many bamboos, and it was difficult to find materials to be compiled in winter. Therefore, Guan Yu's army temporarily switched to wooden mobile walls, which is the kind of cover placed on the ground in "Horse Riding and Killing 2".

However, this kind of guardrail also costs a lot of wood work. Now, anyone who can log and saw wood and make equipment in Guan Yu's army is repairing catapults and city-drawing wooden donkeys and ladder trucks. Who can rebuild mobile wooden walls for shields? Everything is to grab time.

Guan Yu had no choice but to retreat Yin Guan, let him overcome difficulties, and try to coordinate the siege army under the current conditions. The troops continued to attack tentatively according to the original plan and consumed the defending city.

The war was at the beginning of noon, and it was sunny. Although it was the 11th and 12th month of the lunar calendar, the temperature at noon was still above 7 or 8 degrees Celsius. This day was particularly hot, several degrees higher than usual, even if the lowest in the second half of the night, it was only minus one or two degrees Celsius.

At noon, the soldiers were wearing heavy armor and climbing violently. They were all sweating profusely. They stopped and didn't dare to take off, for fear that the sudden coldness would make them lose their armor.

Seeing the soldiers working hard, Guan Yu realized that sharpening the knife would not delay the chopping of wood, so he asked the soldiers who were resting to eat and maintain enough energy to prepare for rotation.

In order to boost morale, all the soldiers who participated in the city and planned to participate in the city at noon all had a piece of mutton or dog meat and horse meat to eat. They could drink a bowl of wine to enhance their courage before going into battle.

Guan Yu himself had dinner with the soldiers, and he set an example. He only had a piece of meat, which was just a larger size. While eating, Xu Huang, who was in charge of the siege of Dongcheng, also took advantage of the afternoon to run to the position where Guan Yu was responsible for, and asked the immediate boss and fellow villager for advice on tactics.

Xu Huang also had a lot of feelings about today's battle because he also participated in the limited-time battle of breaking Yangping Pass nine years ago. It was Xu Huang who brought those miscellaneous troops who had just been reorganized from Baibo thieves to the official army to be responsible for fighting the bloodiest and most unskilled pile of human life ants that were in the final stage. I think it was chilling.

He and Guan Yu were fellow Hedong people, bordering Hedong and Henoi. When they were young, they also traveled to Henoi and the Hebei Plain counties further east. In terms of their familiarity with geography, they were half a local.

Xu Huang knew the subtle differences between Hanoi and Hedong. He was inspired by the heat just now and asked Guan Yu for an appointment: "Taiwei, I have always heard that Gongsun Zan once praised the "Yuan's attack, the momentum was like a god and a ghost". He was especially good at the ability to cave the ground. Shen Pei was the method of offering cave to break Gongsun Zan's Yijing Tower.

The Taihang Mountains have already emerged in Hanoi. In terms of geology, it is similar to other counties in Hebei. It is also dry and soft and easy to dig. Moreover, it is not completely cold and cold. Why don’t we try to attack the city in caves?

If the land is frozen and the surface of the Yellow River is frozen, this trick will not be used. Let's try it now. Even if you capture the Wild King, you will not be afraid of Tuo Yi, Zhang Liao and Wen Chou, who will be able to make a counterattack as usual after rushing to the scene."

Xu Huang's suggestion is adapted to local conditions in terms of geography and weather. Although Hanoi belongs to the Hebei Plain, it is just by the Yellow River. The temperature is not much different from Luoyang and Mengjin on the other side. It is at least four or five degrees higher than the Changshan and Zhongshan counties at the northern end of the Hebei Plain.

The annual freezing period in the lower reaches of the Yellow River is around January and February of the Gregorian calendar, which is exactly the twelfth lunar month and the first lunar month. As long as the land is frozen, the difficulty of excavation will increase dramatically, and authentic tactics will be completely impossible.

This is a move that has a time difference. After using it, the enemy has no time to imitate it. He can only watch Guan Yu occupy the Yewang City until the spring plow next year, or use other methods to attack it.

But this tactic also has many difficulties. Guan Yu is also a person who knows how to talk about it. He shook his head and sighed: "How easy is it? The most disadvantage of the method of caveting the ground is that it is too slow. At the beginning, Shen Pei digged Gongsun Zan for three months, which was the case for a long time. Even if the city defense here is far from the depths of Yijing Tower, it will take at least half a month to dig an authentic tunnel into the city by digging a tunnel...

The entrance to the tunnel is so big, and the cross section to be dug is so spacious. Only a little man-made excavation can be devoted to it. We only have 30,000 troops, and most of them are idle. What's the use? Do you still dig three or five? As long as one can enter the city, it's enough, and nothing else is a waste..."

However, as Guan Yu spoke, he seemed to realize something and his speech slowed down a little.

Xu Huang obviously thought it through before coming, and he reminded him with great help when he saw this: "Taiwei, I remember that before going to war, Zhuge Changshi also mentioned to you that the geology of the counties in Hebei is suitable for burying.

Didn’t he say that when he followed you two years ago, Li Sikongping the Western Regions and inspected the countries in the Western Regions, he was inspired by the method of digging wells and burrows in the Western Regions, and thought of a method that might be used for war…”

Guan Yu nodded excitedly: "Aliang has indeed said something, it can be used when snatching time. I won't hide it from you. That method is called the "Silk Cave Method". It was thought by the people of the Western Regions when they dig underground water digging hiding channels in order to attract the snow and water of Tianshan Mountain to grow grapes. The sun was exposed in the Western Regions, and the open channel was dried before it flowed to the place, so the underground hibernation channel was needed. Zhang Qian of the Han Dynasty saw this when he was on a mission to the Western Regions.

This method is used in the war, and it is aimed at traditional caves. There is only the excavation surface of the tunnel cross-section, which cannot accommodate too many people digging at the same time, resulting in the problem of too slow progress.

People in the Western Regions would dig several vertical shafts along the tunnel at the same time, and then dig from both sides of the shaft towards the initial troop transport entrance. In this way, if two wells are dug at the same time, five sides will be dug at the same time, which is five times faster than the traditional one. Three wells have seven sides, and four wells have nine sides. How many times of manpower is needed to dig at the same time, just dig half of the number of vertical shafts first.

However, the method of tunnels should also be kept confidential and the enemy should not find where we are digging. Otherwise, the enemy can block the exit of tunnels by digging deep trenches at the corresponding location in the city. The vertical shaft method can dig tunnels, and the digging of soil cannot be covered. It will inevitably accumulate at the wellhead to form a mountain of soil, especially the shaft must be closer to the city wall, and will be suppressed by the crossbow at the top of the city at the beginning..."

Xu Huang heard Guan Yu analyze this and based on the onlooker Qing's battlefield experience, he added suggestions: "I heard that Yin Zongjun suggested that the Taiwei set up more walls of arrows outside the city in the morning so that the crossbowmen can hide behind and shoot arrows at the city.

Why not immediately start to let the carpenters in the army make simple wooden walls by hand, and push them to the city before the evening. Then our army dug a real tunnel overnight and then drove dozens of vertical shafts overnight, which were true and false, so that the enemy could not tell which one was true when they woke up tomorrow.

The digging soil is piled on the base of simple wooden walls that block arrows for crossbowmen, or pile up the wooden walls, and do not leave them in one place, and transport them to the surrounding wooden walls and divide them evenly. In this way, Yang Chou’s mediocre talent will definitely not be able to distinguish between the virtual and the real."

Guan Yu raised his eyebrows: This seems to be a try. The one with a gun and a stick is virtual and solid. Several siege tactics are mixed together, and Yang Chou will definitely not see through it.

Besides, even if you see through it, these fortifications have other uses. Those wooden walls with arrows are reinforced and raised by rammed earth, and they are also used when attacking hard, and are not wasteful.
Chapter completed!