There are many locust trees and spruce trees near Yeshan, and Yang Li personally copied the axe and cut down the wood to build a siege vehicle on the spot.

There were three types of siege equipment, and the rudimentary ladders were abandoned in favor of siege towers.

The trebuchet with wheels underneath was a complex structure that was originally used by the Romans to kill and injure enemy soldiers, but Yang Li chose not to build it, and only planned to use the kind of stone thrower that was directly mounted on the ground.

In the next few days, the legions of several lords took turns to attack Yeshan, and under the restraint of Yang Jiao, they did not take credit for climbing the wall and climbed the mountain, and each round of attack was the strict advance of the shield bearers in the front, and the archers and javelinmen covering in the back waited for the opportunity to launch long-range attacks.

With the help of terrain and fortifications, the archers of the Yeshan clan had a great advantage, and the arrows from the top down were difficult to defend, and more than 20 corpses were buried that day, and this was still without forcibly climbing the siege.

At the end of the day, the morale of the soldiers under the lords seemed to be a little insufficient, except for Zhang Dengyun, who only sent archers to provide fire support in the back, and only injured seven people, the rest of the lords were all killed in heavy infantry.

Contact Jiang Wansui who led the elite of the black blood clan to attack Luohe Castle, and you can find the strength of those enemies at the beginning.

Using a simple ladder to climb a castle with scientific structure, strict defense, and no dead ends in firepower, it can still achieve such a record, the predecessor of the Chiyou tribe is indeed extremely brave, and Yang Li's obsession is also like this, unifying the Yanhuang tribe and incorporating the Jiuli tribe into his own regime, which can be regarded as the prototype of the Chinese nation in later generations.

You must know that Chi You is the earliest god of war in China and a candidate for the title of military master.

This soldier master is not indiscriminately sealed by the people, but given by the Yellow Emperor, and the status of worship in the temple, even he recognizes it so, so the combat effectiveness of the Jiuli tribe is beyond doubt.

Where is Chi You, whether he is Jiang Wansui's heir, whether he was born or not, Yang Li doesn't know.

The history of ancient times is very fascinating, and only a few words can be glimpsed from the ancient history books, what was the political system at that time, whether the Yellow Emperor and the Yan Emperor were the same age, or the relationship between parents and children, it is unknown.

However, according to Yang Jiao's guess, Emperor Yan of the Shennong clan should be a figure of the previous generation, while the Yellow Emperor may be a younger generation.

As for Chiyou, most of them are peers or younger generations.

But it's useless to care about this now, Yeshan is in the way, and Yang Jiao is building a stone-throwing tool overnight.

The timber is made into a plate or strip, connected by a primitive mortise and tenon structure, involving a shortage of carpenters, and some siege towers are tied with hemp rope to tie the timber, and it will sway when people climb up, which is basically a disposable, and it will be thrown after the battle.

The siege tower is an important invention in the history of human warfare, which is equivalent to building a mobile fortress out of thin air, attacking the fortress with a fortress, moving the simple wooden fortress with wheels on this side to the enemy's city wall, then the height advantage of the city wall is suddenly gone.

The siege tower is hollow and in the shape of a tic-tac-toe, and the planks on the outside have a certain defensive ability, although an axe or something can be cut open, but it is just an arrow javelin, so you can ignore it.

Siege tower according to the production level, can be divided according to the number of layers and protective performance, a good siege tower, can reach five layers or even more, each layer is connected by a vertical ladder, the space is quite large, there is a wooden barrel on the wooden board of each layer, the bucket is filled with water, used to extinguish the fire, the top has a metal inlaid wooden board that can be put down, and a strong bridge can be built directly between the siege tower and the city wall.

When the siege tower is moved into place, all the soldiers in the tower will gather on the top floor of the tower, waiting for the drawbridge to be lowered, and the moment when the siege tower is connected to the city wall, it is the moment when the heavy infantry in the tower fights the enemy army at the head of the wall.

Yang Li ordered people to smear a lot of silt on the front of the siege tower for fire prevention.

The wooden wheels and bearings under the siege tower were made by carpenters from the Xuanyuan clan, which were strong and reliable, and could be dismantled and packaged for reuse after the battle.

The stone-throwing tools were built directly at the foot of the mountain east of Yeshan, about 200 meters away from the mountain gate, and ancient bows and arrows could not shoot this distance.

Of course, Yang Jiao didn't have the confidence to let his big toy throw a stone two hundred meters away, after all, he was just a model enthusiast, and being able to use steel wire and metal to spell out tiger-like tracks did not mean that he could succeed in getting a stone thrower.

Fortunately, Yang Li's solid foundation in physics played a role, he calculated the moment through the principle of levers and trigonometric functions, and set the length of the two ends of the wooden pole of the stone-throwing machine, as well as the weight of one counterweight and the weight of the stone thrown at the other end.

After three days of harassment led by the lords, Yang Jiao's various engineering equipment was finally built.

If it was in the Middle Ages, Yang Jiao's behavior would have been taken advantage of by the enemy's light cavalry ten times a day, but at present, everyone is barefoot infantry, and there is no awareness of dismantling other people's baggage equipment.

In fact, even his own people didn't know what the leader wanted to do, for example, Huya came three times and said that he wanted to help cut wood, but before he could answer him, he picked up the bronze giant sword and looked at one of Yang Li's woods that was going to be used as a stone thrower throwing arm in half.

Yang Li was furious at the time, so he severely punished Huya.

How to punish him, send him to the engineering team to do chores.

As a result, there is an extra giant in the engineering team, and one person can work hard for five people, and the speed of building equipment has been significantly improved.

So on the afternoon of the day when the general attack began, the warriors of the Yeshan tribe saw such a scene.

The three siege towers were lined up, surrounded by a small phalanx of more than 20 people, each with the person closest to the siege tower in charge of the cart, and the people on the periphery holding shields to cover it.

The siege towers babbled, slow but firm.

During the temporary splicing plank, there are gaps on it to go to more light, and you can vaguely see densely armed warriors inside, and there are more than 30 people in each tower, to say the least.

This is the siege tower.

The next thing to appear was the stone thrower, the outer wall of the residential area of the Yeshan clan was suddenly tied to the horse by a rope and dragged down, revealing five stone throwers behind, the stone throwers were fierce, although only four feet were on the ground, but the stones piled up next to it and the seemingly complex structure all showed the fierceness of this weapon.

Yang Li asked all the lords to gather around him.

Siege is a technical job, and it is true that it can be pushed through with the blood and courage of the warriors, but not every battle can be pushed flat, so the preparations are done, and the rest can be used by external forces.

The throwing arm of the catapult is pulled down by more than a dozen people behind it, and then a number of stones are loaded into the sling pocket, and when the stones behind are pulled to the bottom, the wooden wheel will be stuck, until with a command, the catapult will be powerful.

Yulia and Yang Li stood next to the stone thrower, watching together as the siege system began to work.

Xue Bijiang stood aside, needless to say, he would observe himself.

But Xuanyuan Guang also stood in front of him, arrogant, and had to make Yang Jiao feel worried.

Pulling Xuanyuan Guang to the back, Yang Li rewarded him with a slap in the head:

"Look good, study hard!"

"Just let me teach you how to attack the city."

Yang Li explained to everyone that the role of the stone thrower is not necessarily to directly smash the opposite city wall - in fact, in real wars, it is rare for the city wall to be smashed, most of them are smashed out of the gap, and then they seize the opportunity to rush in.

"Do you see the siege tower in front of you," Yang Jiao picked up a branch out of nowhere and gestured indiscriminately, "When the siege tower advances to a certain distance, the pressure on the soldiers from the rain of arrows on the mountain will increase more and more, can this be understood." ”

All the fighters below nodded together.

"Okay", Yang continued, "what is our goal? ”

Everyone was gossiping, some said that Yang Jiao had fallen in love with the widow of a certain leader of the Yeshan clan, and some said that the big leader planned to snatch the secret recipe of Yeshan's fried noodles, and so on.

Yang Li said angrily: "Shut up." You see, our siege towers are still largely exposed to enemy firepower, and at this time, we must retreat appropriately and obtain assistance in defense. ”

"The best state is, of course, when the siege tower is close to the acceleration distance, the stone thrower comes into play, not only providing the effect of gravel damage to the city wall, but also effectively suppressing the fire at the head of the city, creating a safe environment for the brothers on the side of the siege tower."

Xuanyuan Guang was stunned when he heard this, and he said that with the help of a fierce sword god like me, the enemy has no chance, rest assured.

So when Yang Jiao saw that the siege tower was approaching twenty steps to the city wall and was facing various fire strikes, he gave an order-

"Stone thrower - put ~~" Yang Yu shouted.

The warriors guarding the stone-throwing machine were already hungry and thirsty, and when they heard the order, they immediately swung their sledgehammers and smashed them on the rope mechanism behind the crane arm of the stone-throwing machine.

The rope was disconnected, and the stones on the side of the lever flew out together, not only smashing into the city wall, but also killing the archers on the wall, so that the effect of tactical suppression was achieved.

Under the cover of the stone thrower, the advance of the siege tower was really comfortable, and when I knew that the siege tower was close to the city wall, I found that the effect of this skill was really powerful.

Hula three times, the stones behind the stone thrower flew out, there was a small crack in the city gate, and most of the warriors of the Yeshan clan were weak.

Siege, is a three-dimensional siege, the enemy's head has fallen gravel, the siege tower on the other side of the city naturally can not free up to deal with, for a time, three or two siege towers, just eight meridians to the battlefield, everyone open double on double.

After two waves of rubble stones, the hillside was empty.

The heavily armed swordsmen roared in, directly breaking the city gate, and attacking all the way up the mountain road, it was simply too easy.

"Can you take Dongshan today?" Someone asked.

Yang Li replied: "How do I know about this, anyway, rush forward, don't be stunned." ”