However, Fan Zhuoyuan still used the best ratio formula for the British army.

Although the saltpeter, charcoal, and sulfur in these black powders have not been purified, according to this formula, the power of the explosion is guaranteed to be better than that used by the Taiping Heavenly Kingdom.

In the process of preparing gunpowder, Fan Zhuoyuan was sweating and sweating.

This is a dangerous task that must be avoided by open fires, so there are no torches in the entire tent, and no lighting is allowed nearby.

In addition, the mixing and grinding process is likely to cause friction and fire, so water is also required.

After staying up for half a night, Fan Zhuoyuan finally made all the gunpowder, and immediately called the soldiers to spread the gunpowder of the five coffins on the ground outside with wooden planks, waiting for it to dry the next day.

And after dawn, after the armies have eaten, they immediately arrange the siege of the city, the main force of the siege...... Naturally, it was the 3,000 Liao people who were captured.

The 3,000 captives did not carry any weapons, only the people on both sides were covered by shields, and the middle part of the rear pushed the trench cart all the way down to Yanjing.

Twenty men pushed a trench cart full of earth, and a total of one hundred and fifty trench packers were mighty.

The circumference of Yanjing City is twenty-three miles, with four walls and eight gates, surrounded by a moat.

Now the defenders have destroyed the drawbridge to prevent the city from being breached, so the moat needs to be filled in to attack the city.

The number of defenders was small, and the area outside Yanjing City was flat, and the Song army had many cavalry wandering around, so they did not dare to go out of the city to fight.

When he saw 3,000 captives coming with a trench cart, he could only shoot arrows from afar to stop him.

The trench filling truck originally had a protective effect and could block the loss of arrows.

The Liao people saw that long-range archery could not be stopped, and there was no other way, at this time, there were no trebuchets and bed crossbows in the city, and they could only witness the moat being quickly filled up, and the water inside was also overflowing.

The next step is to the bottom of the city walls.

The captives did not lose much this time, and one by one they ran back, changed their teams, and pushed the battering ram to storm the city gates.

A team of forty people, push a battering ram!

The Song army was surrounded by cavalry to supervise, and the rear overseers wore heavy armor and held large swords, followed closely, and once the city was broken, they immediately entered the city and seized the city gate.

If it could not be breached, it also played a role in preventing the demoralized captives from escaping.

The defenders above saw that it was the Liao people who pushed the battering ram, and immediately shouted in Khitan to stop it.

The captives below wailed, begging the defenders to spare their lives.

Standing on the city wall, Yelu Dashi was extremely helpless, so he could only order an arrow to stop it.

However, there were only 2,000 soldiers who could use bows and arrows, and they were scattered across the two walls, which was very rare.

A battering ram team of about forty people, the long-range arrow rain was blocked by their shields, and it did not cause much damage, and occasionally one of them fell to the ground after being hit by an arrow, and his companions immediately picked them up.

Otherwise, if they stop in place, the heavily armored Song army that followed up in the rear should cut off their heads with a single sword as a deterrent.

The captives had no choice but to go towards the city gate step by step.

When approaching the city gate, the defenders on the city wall threw stones and fell with the people, accompanied by gold juice and oil, this time it was no longer a shield that could withstand it, and suddenly suffered heavy casualties, and everyone fled back crying and shouting for their mothers.

Immediately after that, he was beheaded in public by the Song army that followed, and then ordered the next wave of captives to continue to attack the city!

The Song army attacked two city walls in the east and south, and four city gates, and all the prisoners were consumed anyway, and even if they failed, they would not hurt their morale.

The defenders were killing their own people, and some of the captives were relatives of the people on the city walls, and they were full of despair when they looked up and shouted to each other.

The killing of the defenders not only did not boost their morale, but also made their morale even lower.

By this time, the tunnel had been dug near the moat, and it was necessary to dig deeper into the ground until it was close to the base of the wall.

Fan Zhuoyuan was far behind, carefully watching the gunpowder drying, and sternly telling the scouts to be vigilant about the movements of the remaining 10,000 Liao troops.

Fortunately, it is now July, the sun is blazing, because the gunpowder is spread more openly, and after half a night of drying, coupled with the dry climate in the north, it is dried by the sun in the morning, and it dries quickly.

Fan Zhuoyuan quickly collected the dried gunpowder, put it in a coffin and sealed it, and then put it on fire prevention facilities.

After a morning of fierce fighting, all the gunpowder was finally dried and all was filled back into the coffin.

At this time, the tunnel had been dug close to the root of the city wall, and the soldiers of the Song Army in charge of the earthwork came to report to Fan Zhuoyuan.

"General, the tunnel has been dug to the root of the wall, but I heard that the other side of the city wall seems to be prepared, and it is likely that when the cave enters the city, it will encounter a counterattack from the other side!"

Fan Zhuoyuan said: "We don't enter from under the wall, just dig to the bottom of the wall, and leave the rest to these!"

Fan Zhuoyuan didn't want to delay time, the longer the delay, the enemy's 10,000 mobile troops could come to support at any time.

Therefore, he dragged five coffins into the tunnel, and in order to ensure that in case, he personally drilled into the tunnel and came all the way to the root of the wall of Yanjing City.

The veteran of the tunnel operation used to be a miner, so some of the places that are prone to collapse have been fixed, and although the whole tunnel was excavated in a hurry, the whole thing is quite stable.

When passing through the moat, most of the water has overflowed in the process of filling the moat, as the entire moat has been filled.

For the rest of the water, the veteran dug a sloping tunnel from the side to drain the remaining water first

, and then dig through from the bottom of the moat, supported by thick wood in the middle.

After arriving at the base of the wall, Fan Zhuoyuan had the tunnel widened and five coffins were stuffed side by side, and at the same time, the stone bricks wrapped in the base of the wall were removed to make the coffins fit closely.

In the process, it is obvious that earthwork is also going on on the side of the city wall, obviously to prevent their own use of burrowing tactics, and they may already know where their tunnels are dug, so everything needs to be fast!

Fan Zhuoyuan immediately opened the hole left in the middle of the coffin, introduced the lead, and pulled it out.

However, the walls of Yanjing were thick, and in order to prevent Li Zicheng from attacking and opening the seal, he did not blow up the city wall by using the method of release, but turned the tunnel into an oversized artillery, did not seal it well, and killed the cavalry on his ground.

Fan Zhuoyuan had the coffin filled with soil and compacted to seal it, and at the same time dug an upward passage to the ground of the city wall.

The rest of the people all crawled out of the original passage, and after Fan Zhuoyuan opened the ground, he first circled and fixed the lead near the coffin so that it would not overlap, prolonging the burning time, and then crawled out with the lead.

The defenders above immediately discovered him, and strong arrows came one after another, Fan Zhuoyuan blocked while lighting a fire fold towards the lead, and immediately fled back lifelessly, and at the same time gestured to Wang Yu.

Wang Yu immediately ordered the cavalry to get ready, and looked at Fan Zhuoyuan with a strange expression.

In the face of the rain of arrows, he was not afraid at all, he just ran back frantically, and his face was covered with mud and he was really embarrassed.

At this time, the captives did not know the situation, and they were still forced to rush the city one after another.

The Liao army on and off the city was fighting to the death, so no one paid attention to the quietness here.

After a long time, when Fan Zhuoyuan even thought that the lead had been extinguished, suddenly there was a shocking explosion underground!

The whole wall, starting from the root of the wall, was lifted up by a wave of black air!

The defenders of the city, as well as the prisoners under the city, were torn apart and killed before they could react on the spot.

Those who are unlucky will fly more than ten feet high, and then fall down and break their bones.

More were swept everywhere by the air waves, and there were hardly any intact corpses, and even the captives and defenders who were a little further away were like drunk and delirious.

Everyone inside and outside the city saw this thunderous scene, and they all stood in place dumbfounded.

Even the cavalry of the Song army, who had already prepared, forgot what to do at this time!

Fan Zhuoyuan shouted towards the end of the black smoke: "The city wall has collapsed!" Get into the city! ”

Only then did the soldiers wake up and frantically rush towards the collapsed city wall more than ten zhang wide.

Fan Zhuoyuan also rode his war horse and followed the sergeants.

Only then did Wang Yu and Guo Yaoshi react, and the two looked at each other in a staggered manner, "Yanjing City is now broken?" ”