The Tubo army in Yazhou City also heard the explosion a hundred miles away, and a sense of unease enveloped the hearts of every Tubo soldier, some soldiers who had participated in the Battle of Longyou knew what was going on, but many recruits did not, they knelt down and prayed, begging the Buddha to bless the thunder god not to fall on their heads.

Shang Dongzan was very worried, he knew in his heart that the reinforcements must have been attacked by the Tang army, but it was difficult to predict what the result would be.

But soon, more than a dozen cavalry fled back, there were soldiers in the previous five hundred cavalry, and there were also two escaped cavalry reinforcements, they brought two unfortunate news, five hundred cavalry was ambushed by five thousand Tang troops, casualties, the second unfortunate news is about reinforcements, 20,000 reinforcements were all wiped out, the main general was killed in cheek fever, very few escaped, almost all of them were killed by the Tang army, the surviving cavalry described to the generals the fear caused by the two rounds of explosions, which made the generals change their complexion, They are worried that this powerful weapon will not fall on their heads.

The news of the annihilation of the reinforcements brought a heavy blow to Shang Dongzan, and the morale of the 30,000 Tibetans gradually declined, and some people began to blow the tune of their hometown.

On the fourth day after the total annihilation of the Tibetan reinforcements, 60,000 Tang soldiers came to the city, and the soldiers began to build a large battalion, at the same time, one hundred and fifty steps away from the east of the city wall, the Tang army was building three super-high trebuchets, which were as high as three zhang and five zhang long, which could throw a small iron fire mine of 40 catties at a distance of four or five hundred steps, and also a large iron fire mine weighing 200 catties to be thrown two hundred steps away.

In war, deterrence is extremely important, it can effectively damage the morale of the enemy army and reduce the courage of the enemy army to fight a decisive battle.

As soon as night fell, three trebuchets began to fire, this time launching small iron fire mines, without quenched iron nails, the reason why they were placed in the east was because the Tibetan army camp was in the east, the people lived in the west and south, and the labor camp was in the middle.

Three iron fire thunder flew over the city wall, shot into the Tubo military camp, exploded, the Tubo soldiers were gathered in the barracks to eat, an iron fire thunder just fell on the open space of the crowd, the iron burst out, more than a dozen soldiers were shot and fell to the ground, the Tubo soldiers who were eating were frightened and ran away, and they went back to the house to hide.

Zhou Fei and his men were also eating dry noodle cakes in the courtyard, and the explosion made everyone look at each other, and then everyone hugged each other and cheered, and the bombardment of Yazhou City finally began.

Once the explosion starts, it will not stop, it will continue for two days in a row, the third day will stop, and the fourth day will be the siege.

The next morning, Guo Song and the generals of the brigade stood on a high place and watched the trebuchet attack the city, he pointed at the city wall with a horsewhip and smiled: "Everyone, if the city wall is blown down, can we kill it?" ”

Li Bing said: "If the city wall collapses, the enemy army will inevitably concentrate on repairing it, then just blow up the damn one, as many as you want!" ”

Everyone laughed, and Pei Xin said: "What if you call the people to repair it?" ”

"You stupid! If the people come to repair it, can't we attack it directly? ”

Pei Xin scratched his head, "It's also ha!" ”

Everyone laughed again, and Guo Song smiled: "Then try it, and order a large iron fire thunder to attack the city wall!"

The flag officer rushed to give the order, and after a while, three giant trebuchets were replaced by large iron fire mines, and threw them directly at the city wall, three iron fire thunders, two of which fell under the city, one fell on the city, and the three exploded together, the explosion was earth-shattering, the city was shaking violently, the bricks and stones were splashing, and when the smoke dissipated, the city wall was really blown open a gap as wide as one zhang.

Shang Dongzan was shocked and hurriedly ordered: "Quickly transfer 10,000 people to repair the city wall!" ”

The adjutant general Lun Dosang hurriedly persuaded: "General, don't send people, the enemy army will take the opportunity to attack the city." ”

Shang Dongzan came to his senses and hurriedly changed his order, ordering 6,000 Tubo soldiers to come and repair the city wall.

Guo Song immediately mobilized 5,000 crossbowmen and fired arrows into the gap in the city wall, and the arrows were like flying locusts, so that the soldiers of the Tibetan army could not raise their heads, and they had to move forward with sandbags and use sandbags to fill the gap.

At this time, a large iron fire thunder fell in the group of Tibetan soldiers carrying sandbags, and exploded violently, causing the blood and flesh of the Tibetan soldiers to fly, killing and wounding all over the ground, and more than 200 people were killed and injured by this iron fire thunder.

After paying the price of 1,000 casualties, the Tibetan soldiers finally blocked the gap........

On the third and fourth days, the Tang army stopped the trebuchet attack, and some craftsmen were reinforcing and repairing the damaged trebuchet, and the soldiers of the Tubo army were able to breathe, and the two days of continuous explosions caused more than 3,000 casualties, most of them inside and outside the eastern city wall.

On the night of the fourth day, Pei Xin led 5,000 infantry to lurk outside the western city, and the cavalry did not have an advantage in the street battle at the city gate, but the target was too large and easy to be attacked by the enemy troops hiding in the shadows.

What's more, the cavalry could not cross the hole in the city wall.

In the city, the Tang army attacked the city for two days, so that the city was in chaos, the Tubo army could no longer take care of the laborers, an iron fire thunder once fell next to the labor camp and exploded, frightened many laborers to flee the labor camp and hide in the residential area to the west.

Zhou Fei also took the opportunity to lead his men to hide near the western city wall, next to the courtyard.

In the dark, his subordinate Shen Yaozu flew back, knelt down on one knee and hugged his fists and said: "General Qiyu, the humble post has been checked clearly, there are eight Tubo soldiers in that room. ”

Zhou Fei nodded, he looked at the sky again, it was about two o'clock, considering that it would be half an hour to hollow out the cave, it was time to go.

He waved to eight of his men, "Follow me!" ”

They had limited weapons and could only attack with nine men.

Eight elite subordinates followed Zhou Fei all the way, and in a moment they arrived next door to the target courtyard, Zhou Fei slowly looked towards the courtyard, where two Tubo soldiers were sitting against the wall, talking about something.

This is really not easy to start, considering that there is no back door inside, Zhou Fei simply let it out, he jumped over the wall and threw himself at the two Tubo soldiers.

As soon as the two Tibetan soldiers looked up, they saw one of them rushing towards them, and they were so frightened that they hurriedly got up, but it was too late, and they only listened to the 'click!' Click! Two heads fell to the ground.

Zhou Fei's men also rushed over, and they kicked open the door and killed them.......

In just a moment, the Tubo soldiers in the room were all cleaned up by them, and the other subordinates also followed Shen Yaozu over and helped the courtyard.

Zhou Fei beckoned to everyone, "Come over and help!" ”

Shen Yaozu hurriedly said: "General, it's not yet the third watch!" ”

Zhou Fei shook his head, "The Tubo people are likely to come again, we can't drag it out any longer, it's too dangerous, anyway, the soldiers on the broken city cave don't know." ”

At this time, a series of gunpowder arrows shot into the sky outside the southern city, exploding in the air, which was extremely clear.

Zhou Fei immediately shouted, "Do it!" ”

..........

Shang Dongzan stared at the gunpowder arrows exploding in the air at the head of Xicheng, and the adjutant general said in a low voice: "General, this seems to be a signal of action!" ”

Shang Dongzan nodded, he also thought so, he said in a deep voice: "This is a signal sent to the city, is there a Tang Army spy in the city?" ”

"General, if there are spies, then only among the laborers!"

Shang Dongzan remembered something like lightning in his mind, and he blurted out, "It's not good! ”

He immediately said to Duo Sang: "You hurry up and take someone to the entrance of the cave to see, will it be discovered by the Tang Army?" ”

Rondosan immediately led 2,000 soldiers to rush down the city wall and rush to the west of the city.

There are many people with great strength, less than a tea time, the whole cave has been hollowed out, Zhou Fei and one of his subordinates carefully took out the first city brick with an iron hook, after the first city brick was taken out, the city brick behind it was easy to extract, only a moment, and a big hole was removed.

"Light an oil lamp!" Zhou Fei turned around and ordered.

A soldier lit the oil lamp and handed it to Zhou Fei, Zhou Fei moved the oil lamp up and down, Pei Xin in the distance saw the oil lamp, he was immediately overjoyed, and immediately ordered: "Rush in!" ”

They lurked a hundred paces away, and five thousand Tang Army soldiers jumped up and followed Pei Xin towards the city gate.

"When! While! While! "An alarm bell sounded on the head of the west city, and the Tubo soldiers on the head of the city found the Tang soldiers rushing under the city.

Pei Xin was the first to rush into the city cave, and he immediately ordered: "Quickly dismantle the siege!" ”

Zhou Fei led his subordinates to push down the courtyard wall together, and Pei Xin led a large group of soldiers to rush out, but saw two thousand Tubo killing them.

Pei Xin shouted, and with a swing of the dragon golden gun, he killed it, and his subordinates also killed him.

Five thousand soldiers had already rushed into the city, Zhou Fei and several firearms battalion soldiers fixed a giant iron fire mine weighing more than three hundred catties above the cave, Zhou Fei turned around and shouted: "Hurry up, ignite the fire!" ”

His men rushed outside, and the firearms battalion soldiers lit the arquebuses, and everyone ran out.

For a moment, there was a loud muffled sound, 'Boom! The earth trembled, and the whole wall rose up with masonry, and the broken bricks and stones fell like rain.