The Khitan people of Yunnei Prefecture had retreated to Fengzhou, and they were full of soldiers or village warriors armed with weapons. The valuable grain, grass and property in Yunnei Prefecture have basically been moved to Fengzhou, and all that remains are some stupid and coarse objects that cannot be moved.

Such a worthless city, why did the Zhenwu army spend human lives to attack it?

So when his subordinates came to ask Zhao Ping what to do with the Zhenwu Army's Jiedu envoy, Zhao Ping rolled his eyes: "Burn it!" ”

After completing the preparations for the siege and confirming that the main force of the Khitan army was still fifty miles away, Zhao Ping ordered the trebuchet to start.

Eighty improvised trebuchets lined up at a rate of three rounds per minute each began to drop burning briquettes into the city. When Ho Tai Sin designed these trebuchets, he was based on the principles of reliability, simplicity and high-speed launching, and there was not a single extra wood, even if it was taken to modern times, it was infinitely close to the design standard of the best antique trebuchet!

Eighty trebuchets dropped 240 fire bombs per minute, and 2,400 flaming briquettes were thrown out in 10 minutes!

These briquettes are soaked in oil for at least one night! Once it burns, where can it be extinguished!

In ancient times, the awareness of fire protection was very weak, and the Khitan people were especially not good at the construction of urban defense facilities. The houses in the city of Yunnei Prefecture are densely built, and they are basically built of cloth or wood. The flaming fire bombs flew in, smashed everywhere and immediately shattered into a dozen small fire points with fire, scattered and rolled in all directions, rolling and burning wherever they went.

Under the technical conditions at that time, the only way to extinguish this kind of burning oil-soaked briquettes was to cover them with a large amount of sand, gravel and soil, but the ancient people did not have this consciousness at all, and when they saw that there was a fire, they quickly overturned the water tank, hoping to use water to extinguish the fire, and the result was that these broken briquettes floated on the water, wandering around faster and igniting more houses.

The area in Yunzhou City is still very large, at least larger than the area of Yongbyon Prefecture, but thousands of incendiary materials are thrown in at once, where can it be carried! What's more, the Zhenwu army outside the city has no intention of stopping at all!

Eighty trebuchets worked continuously for more than half an hour, throwing nearly 8,000 fire bombs! Exhaust all the ammunition stocks of the Zhenwu Army at once!

He Daxian is a well-informed person, and he is not at all impressed with this kind of consumables that can be industrialized and mass-produced.

"Anything else? And just throw it away! Throw it all in! Don't throw it away at this time, you keep it for the New Year! ”

Eight thousand fire bombs were thrown into the city surrounded by city walls on all sides, and the entire Yunnei Prefecture suddenly burst into flames, and the temperature in the air rose sharply, and even the cavalry of the Zhenwu Army who were on guard in the siege couldn't stand it, and began to retreat slowly to avoid the high temperature radiation that rose to the sky.

The people outside the city can't stand it, where can the people inside the city bear it!

Countless Khitan soldiers were forced to jump from the city walls, fall to their deaths, or fall half to their deaths. Those who broke their legs and couldn't run, were slowly roasted to death on the edge of the city wall that was warm, and some of them could run, not far from the city wall, and the Zhenwu army fart soldiers who were patrolling the periphery would immediately get excited, like beating rabbits, and shoot these Khitan soldiers who had finally escaped from the city wall to death with an arrow.

The four city gates of the east, west, north and south also opened together, and a large group of Khitan soldiers rushed out!

But what's the use of rushing out?

The Zhenwu army has been under the city for nearly two days, although it is impossible to build another circle of city walls on the periphery, but for the direction of the four city gates, dig a few big pits, and build a few walls to block the cavalry in the city from rushing out, but it will not take much effort!

Those Khitan cavalry who rushed to the front were covered by the rain of arrows of the Zhenwu army as soon as they left the city gate, and those who were not killed by the rain of arrows also plunged into a big pit!

The big pit is very big and deep, and you can't get out if you go in!

The follow-up Khitan soldiers, whether on horseback or on foot, were forced to jump into the pit one after another, and the people who jumped in front were trampled to death by the people who came in behind, and layers of corpses quickly filled the two-meter-deep pit with human lives, and the Khitans actually filled the pit with their lives!

But then they have a three-meter-high wall to climb over.

How to flip with your bare hands! Or fill it with human life!

The people in front rushed to the base of the wall, and before they could figure out what to do, the people behind continued to rush up, trampling all the way, and it didn't take long for the accumulated corpses to pile up an inclined plane, and finally someone stepped on the slope made of these corpses and rushed up to the top of the wall!

But I still can't escape!

Not to mention standing at the top of the wall, it has become the best target for the archers of the Zhenwu Army, even if you continue to run forward, there is a two-meter-deep pit in front of you, and those who can't die will become the corpses used by the people behind to step up!

Of the 15,000 Khitan troops in the city, less than 3,000 rushed out, and the rest were all burned in the brazier-like city! And those who rushed out were either buried in the pit or piled up corpses on the edge of the wall, layer upon layer, miserable!

In the end, there were less than 100 lucky Khitan cavalry, and they finally broke through the obstacles set up outside the city gate, but there were still more than 20,000 Tang troops guarding the periphery!

Layers of light and heavy cavalry on standby and fart archer cavalry running around everywhere, always looking at those Khitan soldiers who escaped through the net, seeing one shoot one, where may you escape!

"Report, the Khitan army appeared twenty miles away!"

"Array!"

Zhao Ping, who was lazily sitting on horseback, suddenly became energetic, and hurriedly shouted loudly for everyone to line up in formation, preparing to deal with the upcoming large-scale field battle.

At the end of the endless prairie, the black-pressed Khitan cavalry seemed to suddenly pour out of the ground, filling the horizon far away.

However, this is the end of it, the Khitan army does not dare to come!

Where do you dare to come! On the prairie in front of Yunnei Prefecture, 20,000 Tang troops were waiting for them, and the 2,000 heavy cavalry of the Zhenwu Army were at the forefront! From a distance, the black-pressed Tang army was divided into three large phalanxes, neatly arranged, with high morale, and was already ready to charge!

Behind the Tang Army, it was Yunneizhou, whose flames soared into the sky and burned the entire sky red!

Come to war? I'll burn you Yunneizhou! I'll burn 15,000 Khitan troops in your city!

What do you think? If you don't accept it, you will fight!

With white temples and more than a year of age, the southwest side recruited the generalissimo Yelu Bugu, straightened his waist and rode on horseback, looking at the Tang army on the opposite side from a distance, his face was red for a while, white for a while, and his heart fluctuated.

It's a tough battle!

Originally, the Khitan army dispersed its troops in order to attract the Tang army to fight a large-scale and multi-level grassland field battle with the Khitan army on the vast desert steppe. The Khitan cavalry is not good at defending the city, but when they enter the prairie, they are naturally like fish in water, how can the Tang army from the Central Plains be an opponent!

Who would have thought that as soon as the battle began, the Tang army would extinguish the reconnaissance cavalry everywhere and directly beat the Khitan army into deaf and blind. When the Tang army also divided its troops to search and sweep, there were two consecutive big field battles in one day, but the Khitan army couldn't bargain at all, and was ambushed twice, suffered big losses in a row, and lost tens of thousands of cavalry!

Is this still the familiar and invincible steppe of the Khitan army?

Yelu Lubugu was an experienced general, and seeing that things could not be done, he decisively changed the strategy of dividing his troops to fight a field battle, began to gather his army, prepared to retreat to Fengzhou, gathered all his forces, and launched an ultimate decisive battle with the Tang army, and the battle was won or lost.

Gathering the remnants of Yelu Kumasi, Yelu Bugu and his army were preparing to come over to make peripheral countermeasures, so that when the Khitan army in Yunnei Prefecture City came out to break through, he saw black clouds rushing to the sky!

The Nima Tang Army actually burned Yunnei Prefecture on fire!

What kind of demon army is this, it actually didn't pay any attention to this majestic city, and didn't even have the least siege of the city, and it directly burned Yunnei Prefecture when it came up!

It's still a step too late!

The Tang army was ahead step by step, always taking the lead, so that Yelu Lu Bugu's strategy could not be carried out smoothly. This breath made Lord Yelu Bugu's old face red, and he couldn't help but spurt out a mouthful of blood, staining the snow-white collar under the armor red.

"Are you alright, sir?"

"It's okay, the whole army retreats to Fengzhou!"

There's no way, you can't mess around at this time, and you can't let hatred blind you. The only choice for the Khitan army is to go back to Fengzhou as soon as possible to prepare for the ultimate Armageddon!

Of the 40,000 Khitan troops who came to Yunnei Prefecture to fight, only more than 10,000 remain. After a command, more than 10,000 riders did not have the slightest nostalgia, and turned around and disappeared on the horizon in unison. (To be continued.) )