Gao Kaidao does know how to remove thistle thorns, Luo Yi once told him that with thick hay tied to shoes, soldiers walk side by side, or with wooden reels tied with straw to push forward, the effect will be better, or use a heavy stone grinder to directly press the tribulus thorns into the soil, but Gao Kaidao could not find a tool, so he could only use the most primitive method to send three thousand soldiers to walk back and forth in the field at night.

After a night's hard work, although ninety percent of the thistle thorns were removed, Gao Kaidao also paid hundreds of casualties, which were wounded by random arrows in the city when they approached the city.

But Gao Kaidao never dreamed that they had just cleaned up the tribulus thorns outside the city at the fifth watch, and Yang Shanhui sent people to climb the rope to go down to the city, and once again laid this kind of Dahe Luo's most hated poisonous weapon within hundreds of steps outside the city.

This is also the reason why Zhang Xuan finally decided to let Yang Shanhui serve as the Taishou of Liucheng, Yang Shanhui has a vicious personality and unscrupulous defense measures, so it is most suitable for him to deal with the aliens in Liaodong.

During the night, Ogara's eldest son, Ogamakai, arrived at the camp with siege baggage pulled by thousands of oxen.

The Khitan siege baggage came from the war materials left by the Sui army in Liaodong, and Yuan Taizuo gave a part of the Khitan, so that the Khitan had the capital to attack the Central Plains city, and this time the Khitan brought heavy siege weapons such as ladders, siege ladders, nest cars, battering rams and trebuchets.

Zhang Xuan was also worried that the other party had heavy siege weapons in his hands, so he sent Li Chun to Liucheng to strengthen Liucheng's defense capability and ensure that the city was not lost.

At dawn the next day, the sound of war drums in the Khitan camp suddenly made the atmosphere over Liucheng County tense, Yang Shanhui watched the movement of troops in the Khitan camp, and in the southeast corner of the Khitan camp, an army of 20,000 people was rapidly assembling.

Yang Shanhui also turned around and shouted: "Beat the drum and prepare for war!" ”

The war drums of the Sui army also rumbled, 10,000 Sui troops quickly deployed on the city wall, and 20,000 militia troops also entered their respective positions as operators.

This time, the defense of the Sui army was very well prepared, unlike many cities in Hebei that did not have large-scale defensive weapons, and could only rely on human flesh to fight for their lives, two hundred and forty large trebuchets were deployed on the city wall of Liucheng twenty miles, which could throw hundreds of catties of boulders four or five hundred steps away.

This two-zhang high heavy trebuchet needs at least 150 people to pull, but after Li Chun's improvement, the old-fashioned trebuchet pulled forward was changed to a backward pull type, using the elastic force of the belt on the trebuchet to shoot, and using the principle of the water well to turn the pulling force into a double winch, so that a trebuchet only needs 20 people to operate.

Li Chun is not only the first bridge craftsman of the Great Sui, he also has outstanding achievements in military affairs, not only designed a winch-type trebuchet, but also designed a row of crossbows similar to a crossbow, that is, the use of bed crossbows, shoot ten arrows at a time, powerful, three hundred steps away can penetrate the shield, this kind of bed crossbow can be operated by only two people, but also with a winch winding, there are four hundred such bed crossbows on the head of the city, to deal with the dense siege army, the lethality is amazing.

In addition, there is also a stone cannon, which is a short-distance heavy-duty stone generator with a trebuchet, which has the advantage of high accuracy, known as the nest car killer, and can break the nest car within fifty steps.

In the passionate drums of the Sui army, 10,000 Sui troops and 20,000 militia operators were already waiting for him, Yang Shanhui's eyes were cold, and he wanted to use the most brutal killing to make the Khitans unforgettable this battle.

Only five hours after setting up the camp, the Khitan army launched its first large-scale attack, 20,000 troops like a black tide rolling towards Liucheng, a hundred ladders and fifty nest carts mixed in, this time the attack on the Khitan did not go all out, trebuchets and battering rams did not enter the battle.

The Khitan soldiers raised their shields, the 20,000 Chongcheng soldiers with spears and swords in their hands, their morale was high, and behind them were 10,000 archers, who were responsible for covering. Boom! Boom! In the sound of the drums that shook people's hearts, they marched towards the north city of Liucheng in a black and oppressive manner.

A series of ladders and nest cars with the strongest horses pulled, slowly in the crowd, behind each ladder and nest car followed by hundreds of people, the drum seems to be beating on the huge wooden wheel, accompanied by wave after wave of shouting and killing, the Khitan army undulates like a wave, the momentum is huge.

The Sui army dug three trenches with a width of one zhang two miles from the city, but these three trenches could not stop the Khitans.

A mile and a half away from the city wall, the drums suddenly became dense, and the 20,000 Khitan army rushed towards the city wall with shouts, and the defenders on the city wall watched the Khitan army nervously and expectantly, as if waiting for something to happen.

The one hundred and twenty heavy trebuchets on the north head of the front city began to squeak and twist the thick ropes, and the long projectile rods bent back, and the accumulated potential energy reached the extreme.

Outside the city is a barren grass, Qi people's knees, the Khitan army rushed forward, rushed to the front of more than 1,000 people suddenly wailed, fell to the ground, they stepped on the Sui army last night for the second time sprinkled in the grass thistle thorns, this batch of thistle terrestris thorns have tens of thousands of tempered in the poison, once the sting, the light is disabled, the heavy is fatal.

In addition to the thistle, there are countless holes, there is a three-inch long poisonous bamboo stick thorn inserted in the hole, many Khitan soldiers stepped into the hole, the long spikes pierced the instep, the attack Khitan army was caught off guard, and hundreds of people fell down and howled and cried, mourning all over the field, and the more terrifying thing was that the legs began to become black and swollen, the pain was unbearable, and many people rolled and howled for a while, and then they died of poison.

"Cut off their legs!"

The besieger gave a quick order, and the bloody thighs were cut off, and the wounded Khitan soldiers were dragged back one after another, and at this moment, a strange sound came from the sky, as if the sound of a flock of pigeons circling in the sky.

The Khitan soldiers looked up at the sky one after another, only to see small black dots appear in the sky, whistling and flying above their heads, getting closer and closer, the Khitan army suddenly broke out with a frightened shout, it was a huge stone, they held their heads and ran away, a 400-pound boulder smashed down, rolled and crashed into the crowd, screamed, blood splattered, was hit by several people into flesh, the boulder knocked over more than a dozen people in a row, the light was seriously injured, the heavy corpse, one hundred and twenty boulders rolled in the crowd, the Khitan army suffered heavy casualtiesImmediately afterward, a second wave of boulders roared.

The boulder on his head pressed on the top, and the killing machine was hidden on the ground, the Khitan army was less than 200 steps away from the city, and more than 2,000 people were killed and wounded. ”

The 20,000 Khitan army retreated like a tide, and the Sui army in the city cheered.....

"Take it for me!"

Dahe Duluo gave an order, dozens of cavalry rushed up, dragged Gao Kaidao off his horse, and pressed him to the ground.

Gao Kaidao also knew why Dahe Duluo was angry with him, the thistle thorn he had clearly cleared last night actually appeared again, and there were countless more traps, you must know that his soldiers had already walked to the moat and paid the price of more than 400 dead and wounded to complete the task.

Gao Kaidao covered his face and said nothing, he knew in his heart what was going on, it must be that after his soldiers had just withdrawn, the Sui army sprinkled it again, what did he do, it was easy to deploy, and it was difficult to clear.

Dahe Duluo's face was pale, roaring like thunder, pointing at Gao Kaidao's nose and scolding: "If you don't explain clearly, I will pay for your life with your men!" ”

"Khan, my soldiers have been cleared last night"

"Clean fart!"

Dahe Duluo smashed a tribulus thorn on his helmet, Gao Kaidao lowered his head and said: "This must be the Sui army redeployed early this morning, yesterday's tribulus thorns were not quenched, but today's tribulus thorns are quenched, it can be seen that these are two different batches, please Khan Ming!" ”

Only then did he remember that Gao Kaidao was Yuan Taizuo's person, and he couldn't humiliate him like this, so he threw away the whip and said hatefully: "Then what do you say?" ”

Gao Kaidao thought for a while and said: "I think I can attack Nancheng, there may be no traps on the Nancheng side, if I am humiliated, please send the Khan to patrol the battlefield at night to prevent the Sui army from deploying again at night." ”

"Alright! Then listen to your advice. ”

Dahe Duluo felt that it also made sense, and immediately ordered the cavalry: "Go to Nancheng to check the situation!" ”

A troop of cavalry galloped away, and returned a quarter of an hour later to report, "Qi Yu Khan, no thistles or traps have been found outside the southern city. ”

Dahe Luluo immediately said to his youngest son, Daheyou: "You can lead 3,000 cavalry to patrol the southern city, and you are not allowed to repeat the old tricks of the Sui army." ”

When Oga Tara ordered the army back to camp, he found himself ill-prepared and needed to make some more preparations before he could storm the city in a big way. (To be continued.) )