In the mysterious and deep Yangtze River Valley Road, a large number of people on the north shore are like a long and dark torrent, but now they have stopped to block the road; the Shu army fortification in front is a flood control embankment, blocking the passage. The noisy sounds rippling back and forth between the rugged rocks on both sides of the shore, like the roar of a mountain torrent.

The Zhou soldiers in front of the fort were digging trenches, busy, like a scene of emergency work. The soldiers were not holding weapons, but hoes, shovels, and digging the soil desperately in the winding and detours.

In this place, the underground is not stones or soil, so the Shu army can dig deep trenches in front of the fort, so the Zhou army can naturally dig them. Unlike the working scene, the stones on their heads were flying around, and the stones shot out of the stone cannon fell on the ground everywhere. Occasionally, the stones fell into the ditches, which made the Zhou soldiers scream.

So people couldn't help looking up at the sky while digging the soil.

The ground outside the trench was full of stones, and the stone cannons of the Shu army did not stop for a moment. From time to time, arrows flew in, but most of them could not shoot the people in the trench. The Shu army's passive defense sandbag tactics could only use long-range attempts to attack the Zhou army to dig trench, but the army did not come out and was blocked by its own fortifications behind the deep trench fortress.

In the camp behind, Guo Shao was sitting in front of a rough wooden table under his general's eyes. The wooden table was so rough that there was only one wooden board and a few stones padding. There were paper and pens on the wooden board. He looked like a construction engineer now, not a general.

"The ditch has been dug in front of the fort. You two personally go up to supervise it. Continue digging as I said. Come back and report the situation in detail. You must look carefully. If something goes wrong, it is equivalent to ineffective combat!" Guo Shao spoke to a general next to him.

The general asked carefully: "Will the gunpowder explode ourselves?"

"No!" Guo Shao said affirmatively, "This is a directional blast, don't worry."

Guo Shao has never done the blasting job, but has seen it before and can understand the rules: gunpowder will leak energy out of the most fragile direction of sealing, otherwise why can't the unsealed gunpowder explode, but it will spray expanding heat energy from the gap? There are also guns that are similar, because the gun wall cannot be blown up, and the energy will leak from the muzzle in a direction. In life, the balloon that blows and pokes a small hole with a needle, and the place where the burst is burst is also the puncture position.

Ren Guo Shao has learned a lot of knowledge and is not very clear about the principles of this professionalism, but his life and knowledge have already told him the rules.

Guo Shao pointed to the things drawn by the drawings and explained to the generals. This man had done "acupoint attack" in wars before, knew how to dig tunnels, and was good at building siege fortifications, so Guo Shao felt that it was a little more reliable to let him supervise civil engineering work, at least he had experience. Guo Shao himself would not go up and "put on his own cannon arrows". There were rocks and arrows flying on his head, so close to the fortress. If he was not lucky, wouldn't he die very unfair? He felt that he would not die if he didn't commit suicide.

...The front army did not dig tunnels directly, which was too troublesome. A group of people digging trenches in the open air and approaching the fortress was much faster.

Everyone dug another ditches in front of the trench fortification of the Shu army and transported sandbags in front. They were less than twenty steps apart. Both sides could see what the other side looked like when they showed their heads. Even if they were so close, the Shu army could not do anything to them for a moment. The heavy weapons of this era were stone throwers and crossbows. The stone throwers shot stones from their heads. The accurate head and frequency were limited. The most limited of course was lethality. Occasionally, stones hit, and at most one person was killed and injured. The crossbows were shot flat, and they could not hit people hiding in the ditch.

Then the generals of Zhou army who were proficient in cave attacks were asking people to dig a hole. This hole was much simpler than digging a tunnel. It was like digging a hole diagonally down from the rear. After digging the hole, it digged upwards and then digging it upwards. The tunnel seemed to be a flat "V" shape.

The hole was not deep, so it was dug in less than half a day after construction.

"Come here! Hurry!" The general turned around and urged him. A stone suddenly fell on the ditch next to him with a "bang", which also surprised him and his neck shrank down.

I saw some people in the trench carrying stones and stones with baskets, and some people carrying coffins behind them. Of course, the coffin was not a corpse, but gunpowder. The thing Zhou Jun had prepared long ago, and was originally planning to encounter a strong city that could not conquer the bombing city. Fortunately, the battle against Shu was prepared for a long time by the whole country, and the amount of gunpowder was sufficient.

It was already noon now, and some soldiers were sitting in the ditches and eating wheat cakes with water. Suddenly, with a "bang", when the general looked back, a soldier's head was hit by a stone cannon, and his helmet could not resist the stone. The soldier's head was broken and blood was tilted into the ditch without even screaming, and a wisp of blood suddenly flowed out of his helmet soaked the mud. He was still biting a piece of wheat cake in his mouth. The general looked at the cake in his mouth and cursed uncomfortablely: "Fuck!"

There were dead everywhere, and the generals didn't ask, and personally drilled into the cave. Another exit of the cave was facing the fortress of the Shu army. The entrance was on the wall of the deep trench dug by the Shu army, and there was still a thin layer of soil left.

There were still candles lit in the cave, but the light that came in from a small hole at the entrance was brighter than the candle. The general came to the front of the hole and looked outside for a while, then took the candle from the soldiers, and carefully looked at the surrounding pit walls. The left and right and bottom had been tamped with wooden pounds, and wooden beams were also built on the top... Rammed earth was the most familiar and exquisite work for people at this time, because at this time, whether it was repairing city walls or houses, most of them were tamped with earth; brick walls were rare.

"Stones and stones mix with the soil and seal them in front first, so you don't need to make them too solid." The general ordered.

The soldiers carrying baskets came up to work hard. Soon the general ordered the coffin containing gunpowder to be placed inside, with a total of eight coffins. (Guo Shao himself didn't know why it was eight, but he didn't need to worry too much about this cost when he was put in too many places.) The lead wire was wrapped in oil cloth, and the front section was wrapped in thin bamboo tubes.

After Lei got the coffin, the general ordered the soldiers to ramm the earth and rammed the coffin with earth firmly with earth on the top, bottom, left and right sides. The tunnel behind continued to ramm the earth and filled it all the way back.

The Shu army seemed to be busy, maybe they felt that the Zhou army was digging tunnels and attacking, so they obviously didn't understand the situation. It was impossible for the cave attack to be made without ten days and half a month. The Shu army had time to temporarily prepare for defense underground.

...A lonely light ship with Zhou Dynasty flag hanging on the river was on the surface of the river. The oars on both sides of the ship were struggling to sail upstream like centipedes. "Puzzle..." Some stones fell into the river from mid-air, and the ship quickly turned around and ran downstream. There was a burst of noise behind the Shu army fortress, as if mocking the ship that was peeping at the Shu army's embarrassment.

The flags on the ships kept shaking left and right.

On the front army on the shore, a general was holding his fist and said, "Get order!" Then he pulled out his sword from his waist, raised it high, and shouted, "Attack!"

The war drums "dongdongdongdongdongdong" sounded, and the flags on the flanks were flattened, and the infantry slowly approached. Soon, stones on their heads flew over, and screams came from the army. After dozens of steps, the bows and crossbows in the two fortresses also shot arrows. The soldiers of Zhou were holding iron wooden shields, and the team was already a little messy.

The wooden ladders in front were all downed one after another, "Kill..." shouts roared in the mountains, and the soldiers rushed forward with swords and shields. They saw flags waving on the wooden arrow tower behind the Shu army fortress, and the defenders should have come out of the Tibetan soldiers' cave to prepare for battle.

The Zhou army soldiers rushed to climb up the wooden ladder, and the stones and the arrows shot above their heads were like rain.

Arrows in the fortress flew everywhere, and even crossbows fired huge arrows as thick as arms; on wooden fences behind the Shu army that were taller than the fortress, archers were shooting arrows.

"Wow wow wow wow wow..." The boat on the river rowed upstream again. This time there were no stone cannons hit it. The stone cannons of the Shu army were smashing the troops attacking the fortress. The flags on the boat changed direction and shook forward and backward.

At this time, the Zhou army was behind the scenes of Jin. The soldiers who had just rushed forward turned around and ran away. The crowd would go to the ebb.

With a "clang" sound, Zhou Junjian shouted. The soldiers who had just returned fell to the ground with the shouts of the generals. The scene was very strange. The soldiers behind stared at the front with their eyes wide open, as if they were expecting something. Many people held their breath, and the noise here turned out to be very strange.

At this moment, there was a sudden "boom" sound, and the green mountains on both sides of the Yangtze River seemed to be shaken. People obviously felt a trembling on the ground, as if an earthquake had occurred. In an instant, fire and smoke sprayed in front, and a large number of stones and soil erupted like a volcano erupting. "Bang bang bang..." The stones hit the earthen castle, and a terrifying sound was made on the stone wall. They seemed to destroy everything in front, unstoppable.

Thousands of pounds of gunpowder lifted up the deep surface of the earth, and no matter what the things were leaning forward, they flew out much faster than arrows. If the stones were not blocked, they would have to fly at least one or two miles away. The rapid smoke immediately covered the entire place ahead and could not see anything.

"Boom boom boom..." Like a continuous sound of muffled thunder, the explosion still echoed among the mountains on both sides for a long time. Countless people have been shocked.

A moment later, far behind the Shu army, the upper layer of the arrow tower was not yet filled with thick smoke. "Jiu... waiu..." As the wood rubbed, the arrow tower slowly fell backwards.

The Zhou army soldiers behind were already shocked, standing there one by one. The debris that were blown away did not affect the east, and they only soared towards the west sky as if they had eyes. The Shu army camp was completely covered by thick smoke, and no one knew what it was now. Only "Ah..." screams of hissings came from afar.

"What are you waiting for?" a general shouted loudly from behind.

"Dongdongdongdong..." A man stood in front of the drum, shook his arms, and thundered from slow to fast, and the sound of the drum surface was heard. The sound of whimpering horns also sounded, and the soldiers came to their senses and started shouting loudly.
Chapter completed!