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

The soldiers who were not on duty all rested early, and at this time, even the pro-soldiers of the Chinese army standing guard were standing or sitting. Guo Shao looked out of the open tent and saw a pro-soldier sitting next to the fire, burying his head in a needle and thread, silently sewing the clothes on his body. The soldier was stocky, but very young, and looked like he was in his teens.

Guo Shao stretched out his hand and rubbed his neck, and continued to write and calculate on the paper on the rudimentary board.

Shortly after the flat-firing bronze cannon was built, there was a gun watch. The so-called gun table is to specify the size of the gun, the amount of charge, and the weight of the iron pellet, and then use the parabolic formula, after calculation and testing, to make a table, and compare the range of each elevation angle.

However, this cannon table is based on a flat table. Now Guo Shao is temporarily calculating the cannon table at a slope of more than ten degrees, because the time is urgent, he has just set up camp today, so that he has not calculated it when it gets dark.

…… The original flat cannon watch was made at the Tokyo school grounds.

First of all, the gravitational acceleration is calculated, and the data in the original formula cannot be used, because there is no comparison between the unit meter, the second and the real-world measurement. The method is to re-experiment. Time is measured as an hourglass with a scale, measured in flicks of the finger (approximately equal to seconds); The units of length are zhang, ruler, inch, minute, centimeter, millimeter, and wire, of course, the so-called precision unit can be ignored, with the current artillery technology and measuring tools, too small units are meaningless at all. The acceleration due to gravity can be calculated by measuring the time and height of the iron ball falling from the floating mass, and by averaging it several times.

This is followed by the calculation of the muzzle velocity vector generated at the elevation angle, which is also very simple. The elevation angle is modeled with a wooden protractor, and the trigonometric function value is only needed to draw a triangle according to the angle and multiply and divide by the length of the figure on each side.

The cannon table made in this way not only has a simple comparison table, but also can set a formula; Temporarily found angles that are not on the gun table, can be quickly calculated on the spot with formulas.

…… When there is a slope on the actual battlefield, it can also be calculated using the basic kinematic formula to form a new gun table.

As for the measurement of the length of the battlefield range, Guo Shao probably remembers that in modern times, artillery mirrors were used; And now it is clear that there is no such thing, and it cannot be done. He's stupid.

There are two methods, one is to choose those who have a strong sense of distance to estimate with their eyes, such as those who used to observe the distance and distance for the catapult on the city wall when they were defending the city. The second is to use a rope to measure the integer distance on the battlefield, nail the wooden stakes, and use those wooden stakes as a reference when the war starts.

Now there are a lot of wooden stakes on the slope ahead, which are nailed during the day, and they are sparse. It is estimated that the enemy army does not know what to do, because there is no defensive effect.

Just then, a man approached. Guo Shao was instinctively more alert in an unfamiliar place, looked up, and found that it was a scribe in a round-necked green robe who came over with hot tea.

He ignored it, and suddenly remembered something, and looked up and asked, "Do you know how to read and do arithmetic?" ”

The scribe hurriedly bowed down and said, "Back to Your Majesty, the villain will." ”

Guo Shao immediately beckoned over: "You come to help me calculate." ”

The scribe stepped forward cautiously, and glanced at the ghostly drawing on the case (with various symbols and Arabic numerals), and his face looked like he was about to cry.

Guo Shao raised his eyes and looked, "Don't worry, I will teach you to use the calculation process, you just need to calculate according to the process." ”

Guo Shao talked with him for a while, and the scribe gradually realized that he only needed to add, subtract, multiply and divide a specific number. The scribe took his leave of the tent again, and took a little of an abacus.

Soon there was a skillful and swift "pop" sound in the tent of the Chinese army, and the scribe calculated very quickly...... The abacus is like an ancient version of a calculator, and its efficiency is much higher than that of a pen, which Guo Shao admires deeply.

…… Nothing happened overnight. As soon as the sky was bright, Guo Shao woke up to the familiar rhythm of drums and trumpets outside the barracks, got up and dressed in armor. A group of soldiers and attendants took care of him.

Guo Shao asked: "The enemy army has arrived?" ”

The scribe who had helped him with his arithmetic last night said, "Back to Your Majesty, its vanguard has arrived as scheduled and occupies the high slope to the west. ”

Guo Shao stretched out his arms, and the eunuch and the male chamberlain hurriedly put a clean liner with green salt washing and fragrance on his body. Guo Shao's expression was calm and calm, his eyes were calm but sharp, and his spirit was adjusted to the best state.

He looked very calm, and asked the scribe, "By the way, I forgot to ask you last night, what is your name?" ”

The enemy soldiers approached under their noses, and the emperor was still in the mood to care about a small official, and his calmness infected everyone.

The scribe hurriedly replied: "Back to Your Majesty's words, the villain's name is Zhang Yin, a person from Xishu." ”

Guo Shao said: "Your official words are very good. ”

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

The belt of the gold buckle was tied around his waist, and Guo Shao lifted the sword and put it on. Then wash up and eat half-full.

He walked out of the tent neatly and stood on the slope for a while. At this time, the sky is brighter, in the early spring morning, the ravine is still shrouded in milky white light mist, Guo Shao looked up at the sky, the weather is very good today.

There was no dance on the top of the mountain in the west, Guo Shao looked at it and could see that there were flags on it, and there were figures standing on it.

Most of the people who stood on the high ground before the war were the commanders and generals of the coalition forces. Guo Shao was there yesterday, maybe the footprints are still there, obviously guessing that Li Yiyin may also be there, Guo Shao has a very close feeling in his heart.

Different people stand on the same piece of land, and their positions will be different, but what is Li Yiyin thinking now?

Guo Shao looked at it for a while, and the generals came to the Chinese army one after another. The forbidden army's battle formation habits for many years still retain a lot, first to the main general, and then to deploy the battle formation.

Nearly 100 people came, and almost all the generals above the commander arrived. Everyone watched the battle formation on the opposite side while waiting for Guo Shao's order.

"Last night, the army had a discussion, and everything was deployed as originally planned." Guo Shao said.

At this time, the generals fell silent.

Guo Shao said: "According to the truth before the battle, the generals can make a reasonable decision on the spot. However, bronze cannons and arquebuses are not allowed to be used without permission! You should remember clearly that the signal for the use of firearms is "Ambush on All Sides"; The signal for the counterattack is "General's Order"! ”

The generals shouted in response.

Guo Shao paused. Xindao, like this kind of decisive battle, it can only happen if the two sides are willing to do so, if the party and Khitan coalition forces are unwilling, can they concentrate the army here? This is an opportunity, Guo Shao is eyeing the cavalry of the coalition army...... Especially the iron cavalry of the Liao army, because in his eyes, only the elite cavalry of the Liao army can be regarded as a qualified and organized cavalry army!

It is necessary to lure the Liao army to ride up so that the war can really begin.

Guo Shao's expression became solemn, and he said: "The forbidden army is composed of the most elite sons and daughters in Kyushu, and the equipment, food and clothing are the best, and they are the people's fat and people's ointment for countless Han people!" ”

This was immediately serious, and the generals straightened up in awe. People-oriented, it was the Tang Dynasty that had thoughts, and Guo Shao's words are still very down-to-earth.

Guo Shaolang said: "The sons and daughters came here over the mountains and mountains, not to make a fool of people and laugh at it, but to make a fool of the face of the Han family, and not to live up to the ardent expectations of me and the people of Limin." For the sake of dignity, for the protection of the country and the people, and for every inch of the land left by the ancestors, I wish you to kill the enemy with all your might! ”

People responded.

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

The generals shouted: "Serve the emperor!" "God bless my emperor, long life knows no bounds!"

……

The mountains were full of marches of troops. Yang Gon looked at the momentum in front of him, and said from the neat military appearance: "The number of enemies is only one-third of ours, but this is a vicious battle. ”

The number of Xu Jun's infantry cavalry in this place is only more than 40,000 people, and the coalition army is about 120,000!

Li Yiyin said: "Xu Jun came here first, why don't you choose the mountain we occupy, but the place opposite?" ”

Yang Gon didn't understand it at all, and only said: "But the opposite side is open, and you can have a good fight!" ”

The coalition army cavalry was mighty, and they arrived at the battlefield one after another, the momentum was greater, and the number of men and horses spread horizontally and wider, and gradually the situation seemed to be a half-arc, forming a semi-encirclement state on the flanks of the Xu army.

More than 160,000 horses and horses gathered in this place, and the noise between the ravines was unusual, and the flags were like clouds, and the scene was very vast and magnificent.

The two rangers had already clashed in the ravine between the two mountains, and the figure of the knight with the bow was seen passing in the distance.

The coalition forces were absolutely superior in numbers, and both Yang Gon and Li Yiyin decided to take the initiative to attack. Yang Gon advised: "The frontal slope is the gentlest, and the infantry of the front army can get close to the formation, and then attack from the infantry dispatched. The cavalry flanked and flanked and stood still.

Although there are preparations for training, the war horses of the party army may be unsuitable in the face of the explosion of firearms, and it is most appropriate to use the infantry army against the enemy's infantry army formation first. ”

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

Yang Gon said: "The number of Xu troops is smaller, but the army is neat and tidy, and it can't be attacked at one time, so you can change people and horses to attack in turn." ”

After some preparations, the Dangxiang infantry moved forward from the hillside, they were also a phalanx composed of groups of people, with different clothes and armor, many people carried bows and arrows, and weapons were varied, but one by one they also had brute strength.

Hengshan produced iron, and the party infantry army had a high armor rate, but it was obviously unable to organize a blacksmith workshop to process the armor, and the armor worn by the soldiers was messy, and they were all homemade at home.

Li Yiyin is still very confident, it is true that you can't fight if you are well dressed on the battlefield, it still depends on the courage of people!

A large army of infantry spread down the mountain, like a black torrent. Li Yiyin looked at this spectacular scene, excited and nervous. Everyone comes to fight to win!

Between the valleys, drums and shouts roared, shaking the mountains and rivers. Li Yiyin clenched the hilt of the sword tightly, and his knuckles turned white from excessive force.