When the news of "Hun King Zhao Mujun finished picking Yan and set up horses" was sent to Wanyan Zonghan's army by thousands of Dajin's defeated soldiers (Dajin's troop losses were not large, but around 3,000). Around the military city of Pingding, the attack and killing of the Song and Jin sides were in full swing.

Dozens of cannons have approached the west gate of the Pingding Military City. Shoot large and small stones and clods towards the walls of the military city of Pingding.

And Wanyan Zonghan himself went directly to the place less than two miles away from the west gate of the Pingding Military City, and viciously watched the Bohai artillery in front of him again and again collect the broken stones collected by Alixi's auxiliary soldiers, and smashed them batch by batch towards the Pingding Military City that made the Dajin Heavenly Soldiers extremely annoyed, but always stood tall.

The hard soldiers of the brigade and the brigade of armor, carrying ladders or trench-filled purses, and axes to cut railings, stood by behind the cannons, watching the scene of stones raining down.

As soon as the cannons stop firing stone and mud shells, they will attack!

And each of them looked so dignified, this was because in the past ten days, every time they pounced, they were repelled by the Song army.

It seems that the stones and mud bombs shot out by the cannons can't hurt the Song people at all.

The Song army of this era, although it was relatively weak in the field, was weaker than the armies of Liao and Jin, and the Western Xia army was also in between.

But in terms of defending and building cities, the Song army is definitely first-class!

It is basically impossible to use a cannon, or a stone thrower, to break the castle that the Song army is really determined to hold. Even if the "Hui Hui Cannon" was blown into the sky by later generations, it actually did not smash Xiangyang City...... Xiangyang surrendered after being besieged for almost six years.

In fact, the method of destroying the city wall by throwing stones with cannons (including return artillery) is not very scientific. Because the catapult is not aimed directly, but curved. Those stone bullets and mud bullets have to obey the laws of parabolic motion, and they must fall from the top!

Therefore, most of the stone and mud bombs shot with cannons fall on the head of the city, and they rarely hit the wall of the city wall directly. Therefore, it is not possible to make a large hole in the wall, which will cause the wall above the large hole to collapse.

And if you want to smash down from the top of the city wall, the difficulty of smashing the city wall is really too high. If you smash some thin walls, maybe it's still possible. However, the rammed earth walls of the Song Dynasty were generally very thick, and the thickness could sometimes exceed the height, and horses could run on the top of the walls of this kind of city!

How could a wall of this thickness be smashed from the top? And while the attacking side smashes the wall, the defending side can also repair it!

If it is not repaired quickly, this wall will have to be smashed in the Year of the Monkey? Of course, not being able to smash the wall does not mean that the cannon is useless, it can't smash the wall, it can smash all the pieces on the top of the wall. For example, bed crossbows, cannons, grate fences, wooden buildings, etc., will be destroyed one by one by the stone bullets and mud bombs fired by the cannons.

Without these things, it would be much more difficult to defend the city!

However, the defenders at the top of the city wall were generally not stoned to death, because in the Song Dynasty, all carefully defended cities would build female head walls (daughter walls) on top of the city walls. It was a kind of earthen wall about five feet high, very thick, built a few feet behind the battlement, which was not only the second line of defense after the battlement, but also the place where the defenders avoided artillery and arrows. When the enemy uses the cannon to fire stone and mud bullets, the defenders will sit with their backs against the women's head wall, and use the dead angle behind the women's head wall to avoid the cannons.

And when the enemy's archers approach the city wall and throw feathered arrows upward, the defenders will erect dog's foot wood on the wall of the female head, and hang leather and bamboo grate fences to block arrows.

In addition, in front of the women's head wall, there will also be a row of forked rows of wood, that is, a wooden fence, the height is a battle away, five or six feet higher than the women's head wall. When the enemy climbs the wall, the defenders retreat to the women's wall, relying on the protection of the forked rows of logs, condescending to shoot arrows or poke with spears.

The enemy army who ascended the city could only use an axe to cut off the forked rows of wood in order to attack the female head wall and occupy this section of the wall.

However, capturing a section of the wall is not the same as breaching the city. Because the city wall held by the Song army will be separated into sections by gange boards. The attacking enemy has to fight one by one, but basically laying down a whole wall does not mean that the city will be broken.

This is because there are usually inner moats within the walls - that is, trenches dug along the inner side of the walls, which can both prevent the enemy from digging tunnels into the city and prevent the enemy from breaking through further after the walls are occupied by the enemy.

The standard of the inner trench is very high, it must be several zhang wide and more than two zhang deep!

And within the inner trench, there is also a inner city. The inner city is not an inner city, but a cheap earthen wall built close to the outer outline, close to the inner moat, usually only two zhang high, and made of soil obtained from the excavation of the inner moat. The castle head of the inner city also needs to be armed, and there are generally fortifications such as protective walls.

The role of the inner trench is not only to serve as a second line of defense after the fall of the outer trench, but also to eliminate internal troubles...... Nurhachi, who is good at breaking through the city in a few places, is fortunate not to encounter this kind of Song-style fortified city, otherwise his spies would have to hit the inner city and inner trenches from the city, if there is no siege equipment, where can it be defeated?

And within the inner city, there is usually an inner city that protects the official office...... This is the so-called "two trenches and three cities".

So even if you can smash the outer city with a cannon, it's still too early to break the city!

As for the offensive and defensive battles to pacify the military city, it is now going on...... The battle stage between the sheep and horse wall and the outer trench outside the outer outline, this outer trench and the sheep and horse wall are not easy to fight!

This wall of sheep and horses was built against the inside of the trench, and if the trench was not filled, the attacking side would not even have a place to stand.

You can't fill an entire trench if you want to fill it, and the gold thief doesn't have a bulldozer, where can he do such a big project? Therefore, it can only fill in a short paragraph, and the defenders will know where to focus on the defense at a glance. And their method of arming was also simple, just erect a row of forked trees more than a foot high behind the corresponding sheep and horse wall of the trench that the golden thief wanted to fill. The sheep and horse wall is four feet high, and the forked rows of wood are one foot high. The golden soldiers can climb the sheep and horse wall, but they cannot jump over the forked rows, they have to stand on the sheep and horse wall and cut the forked rows. The Song army was able to shoot them with a divine arm bow and stab them with a spear......

To break through such sheep and horse walls and outer trenches, it is useless to rely on cannons alone. Because the Song army was hiding against the sheep and horse wall with their backs, the cannons couldn't hit people at all. Send archers close to throw heavy arrows, and they will be accurately shot by the Song army's divine arm bow on the head of the city. And the attacking Jin soldiers don't know if there is anyone behind the sheep and horse wall? Maybe they are hiding in the cave of the city gate? The Song-style city outline pays attention to "the city gate is more expensive than the less", and many small gates will be dug on the city wall during the war, which can not only facilitate the defenders to go out of the city to attack the enemy, but also hide the soldiers, killing two birds with one stone.

To build other large-scale siege equipment, such as opposite buildings, goose carts, cave houses, etc., it is relatively difficult to build, and the Bohai craftsmen of the Jin people are not good at it; Second, there are not so many trees available around the military city in Pingding, and if you want to build more and bigger equipment, you have to go up the mountain to cut trees, which is time-consuming and laborious......

Just when Wanyan Zonghan, who was in a depressed mood, was about to give the order to attack again, Wanyan Lou, the general who was in charge of blocking Jingcheng Road east of the military city of Pingding, and Wanyan Xiyin, Zong Han's deputy, flew over, and their faces were pale.

Wanyan Zonghan knew that it was not good at a glance, and his voice was a little dry: "What? Is there news of the Eastern Route Army? ”

He didn't know that he had lost his son in middle age, and he thought that Wanyan Zongwang was unlucky!

"No, it's not the Eastern Route Army, it's the soldiers we sent to fight Niangzi Pass that were defeated, and they lost more than 3,000 people, and the rest just came back, and they brought back bad news...... "Wanyan Xiyin is a cultural person, and he is not very simple when he reports the funeral, and he is a little stumbling.

"Bad news?" As soon as Yan Zonghan heard this, he chuckled in his heart, "What bad news?" ”

Hee-yin sighed, still not speaking.

The one on the side who looked fierce and vicious was a crisp and refreshing person, so he simply grabbed the question, and opened his mouth and said: "Deputy Marshal, Sheye Ma died, he was ambushed during the night attack on the Song camp, and was shot to death by Zhao Kai, the king of Yun of the Song Kingdom, and he didn't even snatch the body back." Yelu Yu saw that the whereabouts of the old boy were also unknown, and he was either dead or descended......"

"What? He ...... "After speaking, Yan Zonghan's eyes were dark, and then he lost consciousness.

......

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