In any case, the outnumbered Jin army began a large-scale earthwork work, and they were very clever enough to use the large pit dug by the mountain of earth to dig tunnels directly into the city wall, and the progress was amazing.

Ma Wei knew in advance what Lu Dao Alu Bu was going to do, and he turned around and relayed what he said to the people in the pass, saying: "The Jin army outside said that they will dig tunnels through the city, and when the time comes, all the people in the pass, regardless of men, women, and children, will be killed, and no one will be left!" The people were frightened when they heard this, and they all knew that the Jurchens often didn't say what they said, but the slaughter of the city has always been done as they say. Immediately came over and begged Ma Wei to be willing to share the hardships with the Song army and live and die with the city!

Not to mention that those who are close to ink are black, and those who are close to Zhu are red, Ma Wei was born in the guard camp and learned badly with the emperor, and won the absolute support of the people in one sentence. So in this three-foot freezing day, the people in the pass began to dig trenches around the city wall in a hurry. As soon as the tunnels of the Jin army were dug to the edge of the trenches, they would be exposed, and the soldiers who dug for the earth would be killed by countless pickaxes and shovels falling from the sky.

Then, according to the standard tactics of this era, the exposed tunnel mouth was stuffed with firewood and grass to ignite, and the bellows were used to blow the wind, and the smoke and fire were blown into the tunnel, and the enemy soldiers in the tunnel were either burned to death by fire or smoked away, and they were forced out of the tunnel. However, the veterans from Beifu all learned a trick from the emperor called 'earth plane', which was originally to teach the sappers how to blast a strong stronghold, that is, to ignite the explosive bag and stuff it into the dug tunnel, and with a bang, smoke rose from both ends, and the house collapsed.

As for what an airplane is, why the emperor calls this blasting method an earth-made airplane, and everyone doesn't understand it, but this method is very effective. And that's how it was handed down. Ma Wei carried this method forward here, and not only used it for siege. Today, it is still used to defend the city, but this work has to be done by professionals. Otherwise, it would not be helpful to blow up the city wall as well.

Seeing that the tunnel was dug through, the marines stuffed several huge explosive bags into it, which was really a desperate plan, not only blew up the tunnel, but also buried the Jin soldiers working inside. But it is also a good thing that they finally have a place to be buried, from dogs and eagles after death, and the city wall as their tall tombstone, which is also a good thing!

Looking at the entrance of the cave, a puff of black smoke came out. Immediately after that, the smoke and dust were misty, crackling with the air current, some stinky shoes and rotten socks flew out, and some stumps and broken arms, the tunnel collapsed, and the Jin soldiers who were about to enter the tunnel were frightened and refused to go in. Seeing hundreds of soldiers buried alive, Aru twitched his face only twice, and ordered to dig again, but this time the tunnel was not dug through. but only dug under the foundations of the city. Then plug wooden stakes in the tunnels under the city walls, dig up the surrounding earth and stones, and finally pour fire oil on the wooden stakes, ignite them and burn them. Cause the walls to collapse.

This method of 'burning the city base' is quite ruthless compared to directly burning the city wall, and the effect is also very good. Ma Wei was also helpless, and the tunnel dug under the frozen soil a few feet deep from the ground. Bullets can't hit anyone, and the small guns of the Marine Corps can't penetrate the permafrost even if they shoot directly. It was seen that the weak points of the wall collapsed as the wooden stakes broke. At the last moment. Ma Wei led the army to erect a wooden fence after the city wall collapsed, and deployed several machine guns to fire at the gap to repel the enemy who rushed up to seize the pass. At the same time, the gap was filled with soil bags, watered and frozen, and a new defense system was built on the ruins, which once again thwarted the offensive of the golden general.

After three days of fighting, Arubu not only failed to conquer the city, but also offended the people of the pass, making them stand with the defenders, which made them very aggressive. But Arubu is not a person who easily admits defeat, and since this kind of low-level earthwork can't work, let's play some high-tech. He then ordered the Jin soldiers to cut down trees outside the pass to make large siege trucks, loaded with giant logs and sharp iron ramming horns, and to make baffles with thick wooden planks to block the bullets fired by the Song army's muskets. He was ready to play with the aesthetics of violence, trying to break through the walls of Yuguan with brute force.

It took a whole day for the siege engines to be made, and Arubu couldn't wait to send them to the battlefield. Watching thousands of people pushing five or six huge siege vehicles to march in a sonorous manner, rolling in, it really caused a great shock to the Song officers and soldiers defending the city, the city wall of Yuguan has been in disrepair for a long time, although they have repaired it, but the outer wall is not covered with bricks, and there is no stone foundation, just now there are a few collapsed, how can it withstand the ravages of this big guy!

Ma Wei was not in a hurry, he had already seen this kind of formation, he used high technology to deal with high technology, ordered the generals to carry all the artillery to the city, fired solid shells with rapid-fire guns to bombard siege vehicles, mortar guns fired incendiary bombs, two-pronged. After all, the cold weapons could not defeat the hot weapons, and the siege engines were destroyed before they could get close to the city, igniting a raging fire, and the Song army could bake the fire by stretching out his hand while standing at the head of the city.

Wanyan Alu knew that there were various ways to siege and defend cities in the Central Plains, and he also read several military books and learned that siege tactics are usually distinguished by the five elements of 'metal, wood, water, fire, and earth'. He rammed the city with a siege chariot and could be called golden; Pressing with a strong bow and a hard crossbow is wood; Burning wood to destroy the walls is fire; It is soil to build mountains and dig tunnels. Four of the five methods have been used, and there is only one water left, but this season, the river is frozen, and the Yuguan city is on high ground, and it is not feasible to irrigate the city by breaking the water; There was only one way left to cut off the water source and die of thirst for the Song army, but he thought about it and gave up, this place is close to the mountains and water, and the groundwater resources are abundant, and the Song army in the pass only needs to dig a few wells to solve the problem, and he will not waste any more trouble...

It has been a few days since he was blocked under Yuguan City, Alu Bu is a little frustrated, in the past, he won more with less, invincible and invincible, and now he has made himself disgraced by bullying more and less. I used all the methods I used, and I did what I could do, but I paid heavy casualties but made no progress, not to mention the aid of Yanjing.

After racking his brains again, Aru Bu figured out a new strategy, which was that the Yejin army died down and retreated. The lookout post on the city immediately found out, and hurriedly reported to Ma Wei, and as soon as several leaders met, everyone thought that the retreat of the Jin army should take advantage of the situation to cover up and expand the results of the battle.

"It shouldn't be, although the Jin army can't attack the city and suffer heavy casualties, but its strength is not damaged, don't you think it's strange to withdraw the army suddenly?" Ma Wei didn't agree, and said with a frown.

"Listening to Du Tong say this, it is indeed strange, this road Jin army is here to rescue Yanjing, unless they learn the news that Yanjing has been lost, how dare they withdraw without authorization!" He Wei, the commander of the first brigade, thought for a while and said.

"It's impossible to say, it's impossible for the Yanjing Jin Army not to have missed the net, and we just control the traffic arteries, there are countless dense paths in this mountain, and some stragglers bravely escaped the investigation and fled to the outside of the gate to reveal the news!" Tao Qian, the commander of the Second Brigade, said.

"If the Jin army suddenly learns the news of the loss of Yanjing, it will definitely retreat in a hurry, and it is a good opportunity for us to chase and kill!" He Wei said and turned back.

"It's impossible to judge the authenticity now, but is the Jin army retreating by deception? Once we get out of the pass and are killed by them, won't we lose the pass, and besides, we only have a battalion of cavalry, and we can run more than four legs on two legs, if they are bent on leaving, we will not be able to catch up! Tao Qian also calmed down at this moment, the boat is the leg of the marines, and only a small number of cavalry in their establishment are used for transmitting news and reconnaissance, while most of the Jin army is cavalry, and their mobility ability is far superior to their own.

"If I am Aru Supplement, even if I know that Yanjing is lost, I will capture Yuguan City!" Ma Wei said suddenly.

"What do you mean by that?" He Wei asked suspiciously.

"Yanjing and Pingzhou have been lost, the Jin army has lost the Central Plains, and it has lost a large number of troops, and it is inevitable to turn from attacking to defending at a disadvantage, so Yuguan is the throat of blocking our army from going north, and once it passes this pass, it is a thousand miles of plains without danger to defend. Whether it is Arubu or the emperor of the Jin State, they should take advantage of the fact that our army has not yet arrived, and they should make every effort to capture Yuguan as a barrier against our army's northern expedition! Ma Wei said.

"Then Aru Bu must have feigned the withdrawal of troops, set up an ambush halfway to ambush our pursuers, and then take the opportunity to seize the pass!" Tao Qian listened to Du Tong's analysis, which is not unreasonable.

"In that case, let's let them toss and see what he does when he comes back tomorrow!" He Wei also figured it out, and he smiled as he thought about Aru's appearance after making up for his mistakes.

"We can't be so cheap for them, let's just plan it..."Ma Wei gathered everyone over, and said with a wicked smile, and several people laughed non-stop when they heard it, and they all boasted that they were all really bad...

Aru Bu led the army to be busy in the field for half a night, so cold that his hands and feet were numb, and his nose was runny, and he didn't see anyone coming out of the pass to take a look, so he could only slip back to the city of Yuguan stupidly. At this time, he suddenly realized that the defenders on the gate might have let their guard down because of their withdrawal, and they were all asleep. Listening to the snoring of the city like thunder, Aru made up for the joy, this is really intentionally inserting willows and willows, and unintentionally inserting willows and willows, he hurriedly ordered his subordinates to take the opportunity to attack the city.

When the soldiers of the Jin army crept to the city and quietly erected the ladder, suddenly the city remembered the earth-shattering drum and trumpet, and the lantern torches illuminated the city. This time, Aru was really anxious, and simply 'broke his head and hit the golden bell', and launched an offensive in turn, and the sound of shouting and killing throughout the night, the sound of gunfire, resounded with momentum, and the night sky was red by the flames of war... (To be continued......)