It was a quiet night, but Guo Shao knew that the enemy soldiers were approaching and expected to appear nearby tomorrow morning.

The soldiers who were not on duty all rested early, and even the personal soldiers standing at the central army were standing or sitting. Guo Shao saw from the open tent and saw a soldier sitting next to the fire, holding needles and threads, silently sewing clothes on his body. The soldier was very strong, but very young, and looked just over teenage.

Guo Shao reached out and rubbed his neck, and continued to write calculations on the paper on the simple chopping board.

The flat-fired copper cannon has a gun watch shortly after it was built. The so-called gun watch is to specify the size, charge amount, and weight of the iron ball. After the parabolic formula is used to calculate and test, a table is made to compare the range of each elevation angle. &↗wán↗↗Iba,⊕.∷≈.p;

However, this gun table is based on a flat ground table. Now Guo Shao is temporarily calculating the gun table with a slope of more than ten degrees. Because time is tight, he has just set up camp today, so it is dark and he has not calculated it yet.

...The original flat gun watch was made at the Tokyo schoolyard.

First, calculate the gravity acceleration. The data in the original formula cannot be used because the unit meter and the comparison value of the actual measurement cannot be found. The method is to re-expert the time measurement. The measurement of time is an hourglass with a scale, in a snap of the finger (about equal to seconds); the length unit is zhang, size, inch, centimeter, millimeter, and wire. When the so-called precision unit on the surface is ignored, the current artillery technology and measurement tools are used, too small units are meaningless at all. Use the time and height of the iron ball dropped from the pagoda, and repeatedly take the average value several times to calculate the gravity acceleration.

Then the calculation of the initial velocity vector generated at the elevation angle is also very simple. Use a wooden protractor to elevation angle. The trigonometric function value is just a triangle modeled by the angle, and multiply and divide the length of the figures on each side.

The cannon table made in this way not only has a simple comparison table, but also set formulas; if you find an angle that is not on the cannon table temporarily, you can quickly set the formula to calculate on the spot.

...When there is a slope in the actual battlefield, it can also be used to calculate the calculation using basic kinematic formulas to form a new gun table.

Regarding the measurement of the range length of the battlefield, Guo Shao probably remembers that he used gunshots in modern times; but now it is obvious that he can't do it without this thing. His method is more stupid.

There are two ways: one is to choose people with a strong sense of distance to estimate with their eyes. For example, when defending the city in the past, they used to observe people who used to use a rope to measure the distance and distance on the city wall. The other is to measure the integer distance with a rope on the battlefield, nail the wooden stakes, and when the war begins, they will use those wooden stakes as reference objects.

There are many wooden stakes on the slope in front, which are sparse and sparse during the day. I guess the enemy doesn’t know what to do because there is no defensive effect.

At this moment, a man approached. Guo Shao was instinctively alert in a strange place. He looked up and found that a scholar wearing a round-necked green robe came over Duanre Tea.

He ignored it, and suddenly remembered something, looked up and asked, "You know how to read and arithmetic?"

The clerk hurriedly bowed and said, "Go back to Your Majesty, the villain will."

Guo Shao immediately waved over and said, "Come and help me calculate."

The clerk walked forward carefully, glanced at the ghost-like talisman on the desk (with various symbols and Arabic numerals), and looked like he was about to cry on his face.

Guo Shao looked up and said, "Don't worry, I'll teach you how to use the calculation process. You just need to calculate according to the process."

Guo Shao talked with him for a while, and the clerk gradually realized that as long as you add, subtract, multiply and divide the specific number. The clerk said goodbye and left the tent and took a few abacus.

Soon, a skillful and quick "pa" sound rang out in the central army tent, and the clerk calculated very quickly... The abacus was like an ancient version of the calculator, and the efficiency was much higher than that of the writing. Guo Shao was deeply impressed.

...All night was fine. As soon as the sky was dawn, Guo Shao woke up at the familiar rhythm of the drum and moustache outside the military camp, got up and put on his clothes and armor. A group of personal eunuchs took care of him.

Guo Shao asked: "The enemy has arrived?"

The clerk who helped him with arithmetic last night said: "Go back to your majesty, his vanguard arrived as scheduled and occupied the high hillside to the west."

Guo Shao stretched out his arms, and the eunuch and the male eunuch hurriedly put the clean lining that was washed with the green salt and washed the fragrance on him. Guo Shao looked calm and calm, his eyes were calm but sharp, and his spirit was adjusted to his best state.

He seemed very calm and asked the clerk: "By the way, I forgot to ask you last night, what's your name?"

The enemy soldiers approached the nose, and the emperor was still in the mood to care about a minor official, and his calmness infected everyone.

The clerk hurriedly replied: "When you say to your Majesty, the villain is called Zhang Yin, a native of Western Shu."

Guo Shao said: "You speak very well."

With the help of everyone, Guo Shao quickly put the refined plate armor on and tied the dark purple cloak. He was not yellow on the battle formation, but too bright, and it was easy to attract the care of the enemy soldiers under special circumstances.

He tied the golden buckle belt around his waist, and Guo Shao raised his sword and put it on. Then he washed and ate half full.

He walked out of the tent neatly and stood on the slope to observe for a while. At this time, the sky was getting brighter. In the early spring morning, the valleys were covered with milky white and shallow mist. Guo Shao looked up at the sky and the weather was very good today.

There was no dancing on the top of the mountain to the west. Guo Shao looked out and saw flags and figures standing on it.

Most of the people who stood on high places before the war were commanders and generals of the coalition forces. Guo Shao had been there yesterday, and maybe his footprints were still there. Obviously, he guessed that Li Yiyin might be there too, and Guo Shao felt very close.

Different people will have different positions when standing on the same piece of land. What are Li Yiyin thinking now?

Guo Shao looked at it for a while, and the generals came to the central army one after another. The imperial guards' war formation habits for many years have still retained a lot. They first came to the main general and finally deployed the battle formation.

Nearly a hundred people came, and almost all the generals above the commander arrived. While watching the battle formation opposite, everyone was waiting for Guo Shao to give the order.

"I had already discussed the matters in front of the army last night, and everything was as planned." Guo Shao said.

At this time, the generals gradually calmed down.

Guo Shao said: "According to the facts in front of the formation, the generals can make reasonable decisions on the spot. However, copper cannons and grenade guns are not allowed without permission! Please remember clearly that the signal of using firearms is "Ambushes on Ten Sides"; the signal of counterattack is "General Order"!"

The generals yelled and answered one after another.

Guo Shao paused and thought to himself that a decisive battle like this can only happen if both sides are willing to do it. If the Dangxiang Khitan coalition is unwilling, can they concentrate the army here? This is an opportunity. Guo Shao is focusing on the cavalry of the coalition...especially the cavalry of the Liao army, because in his eyes, only the elite cavalry of the Liao army can be considered a qualified and organized cavalry army!

The Liao army's elite cavalry needed to tempt the war to truly begin.

Guo Shao's expression became solemn, and he said, "The Imperial Guard is the most ingenious man in Jiuzhou. He is the best in equipment, food and clothing. He is the most valuable and rich man for countless Han people!"

This statement suddenly became very serious, and the generals stood up in awe. Putting the people first, they had thoughts during the Tang Dynasty, and Guo Shao's words were still very down-to-earth.

Guo Shao said loudly: "The boys came here over mountains and rivers not to make a fool of themselves, but to make people laugh at the face of the Han family. Don't let down my ardent expectations and the people. For dignity, to protect the country and the people, and to every inch of the land left by our ancestors, I hope you will work hard to kill the enemy!"

People responded one after another.

After hearing this, Guo Shao didn't say much and ordered: "Prepare for war!"

The generals shouted loudly: "Serve for the Emperor! God bless my emperor and live forever!"

...

There were army troops all over the mountains. Yang Gun looked at the momentum in front and said, "The number of enemies is only one-third of us, but this is a fierce battle."

The number of Xu's infantry and cavalry deployed the formation here was only more than 40,000, while the coalition forces were about 120,000!

Li Yiyin said: "Xu Jun came here first, why didn't we choose the mountain we occupied but the place opposite?"

Yang Gun didn't understand at all, and just said, "But the opposite side is open and you can fight happily!"

The coalition infantry and cavalry arrived at the battlefield one after another, with a larger momentum, with many people spreading horizontally and wider. Gradually, the situation seemed to be a half arc, forming a semi-encirclement state on the sides of Xu Jun.

More than 160,000 people gathered here, with the huts and bustling among the valleys, the flags were like clouds, and the scene was very grand and spectacular.

The two sides had already clashed in the ravine between the two mountains, and they saw the figure of a knight pulling a bow crossing in the distance.

The coalition forces had an absolute advantage in number, and both Yang Gun and Li Yiyin decided to take the initiative to attack. Yang Gun suggested: "The front slope is the slowest, and the front infantry can get close to form a formation, and then attack from the dispatched infantry. The cavalry protected the two wings and remained motionless.

Although there are some preparations for training, the Dangxiang Army’s war horses may be uncomfortable in the face of the explosion of firearms. It is best to use infantry to fight the enemy infantry and military formations first."

Although Li Yiyin was the supreme commander of the main force, he also believed in the experience of the Liao army's long-time generals and adopted the suggestion.

Yang Gun said again: "Xu's number of soldiers is even smaller, but the military appearance is cleaned up and cannot be captured at one time. You can replace the troops and take turns to attack."

After some preparation, the Dangxiang Infantry moved forward from the hillside. They were also a square formation composed of groups of people, with different armors, many people carried bows and arrows, and weapons were varied, but each of them also had a strong sense of strength.

The armor rate of the Dangxiang infantry is very high, but it is obviously unable to organize the blacksmith workshop to process the armor. The armor worn by the soldiers is messy and they are all made at home.

Li Yiyin is still very confident. Indeed, he can't fight just by dressing well, but it depends on human courage!

The large number of infantry troops spread down the mountain, like a dark mountain torrent. Li Yiyin was excited and nervous when he looked at the spectacular scene. Everyone came to fight for the sake of winning!
Chapter completed!