The secret weapon mentioned in the trial was a batch of explosives secretly produced and hoarded by Yuan Jun after the demon Dao Yu Ji taught Yuan Shao how to make black powder.

From the time Yuan Shao learned the recipe of black powder to the attack on Qingzhou, Yuan Jun prepared for three months, and the black powder produced was enough to fight a large-scale war. Although Yu Ji's formula is not comparable to the gunpowder produced by the Jin Kingdom, it has also stepped into the level of thermal weapons, as long as the amount is enough, it will also cost human life!

Yuan Shao had personally seen the terrifying scene of Zhao Xing leading his troops to attack the city of Xiatao, using an ironclad car filled with gunpowder to instantly blow up the gate of the city, and he had also seen the bloody scene of Zhao Xing burying gunpowder under the land and killing a thousand Yellow Turban diehards in the blink of an eye. Therefore, after Yuan Shao learned about the production method of black powder, he immediately asked people to develop ironclad vehicles specially used to blow up the city, as well as explosives bags that could be thrown by catapults.

The hard work paid off, and a group of skilled craftsmen recruited by the Yuan family actually made a secret weapon similar to the Jin State ironclad car and the "Thunder of the Sky" according to Yuan Shao's introduction and comparison, and after the trial, it was found that the power was huge and could definitely reverse the situation on the battlefield.

Yuan's army, which had suffered a heavy setback in attacking Linzi, naturally thought of using the last secret weapon.

In view of the defensive characteristics of Linzi City, Yan Liang and Wen Chou finally formulated a plan to feint at the West Gate and bomb the North Gate three days later, and began to prepare the required gunpowder and ironclad vehicles overnight. Considering that there was a moat outside the Acropolis in Linzi as a cover, Yan Liang and Wen Chou also specially sent troops to find some wooden boats from Le'an, which had occupied most of the territory, and prepared to use the boats to temporarily build a pontoon bridge at that time.

Kong Rong in the city saw with his own eyes that Wu Anguo commanded the soldiers to defend the city and beat Yuan Jun's head, but his own side suffered few casualties, so he had some confidence in his heart, and completely threw the heavy responsibility of defending the city to Wu Anguo, but he stayed in the state minister's mansion and buried himself in proofreading the "New Notes on the Analects" that had been published with the Commercial Press.

At this juncture, Kong Rong can still calmly proofread his manuscript, which fully illustrates a problem, that is, he should transfer to Taihang Academy as a teacher, instead of doing the current state pastor who is mainly in charge of the affairs of a state.

Three days later, Yuan Jun made a comeback. On the surface, the Yuan army still used the old way of siege, the army was commanded by Yan Liang, first the catapult fired a burst of stones towards the city, and then a group of soldiers with shields in their left hands and ladders in their right hands began to approach the city, intending to build a bridge over the moat and climb the wall of the acropolis outside the west gate.

Wu Anguo then personally came to the corner tower of the city wall of the West Gate Acropolis to sit on the command, and ordered the Qingzhou soldiers at the head of the city to shoot a rain of arrows at the Yuan army who dared to approach. In the back and forth tug-of-war, Wu Anguo gradually discovered a problem, that is, although the Yuan army attacking the city this time seemed to be even more powerful than a few days ago, it seemed that they all had a long memory, and they always wanted to avoid the arrows at the head of the city, and very few people really risked their lives to climb the city wall from the ladder that crossed the moat.

Just when Wu Anguo was puzzled, suddenly a soldier rushed over from the north gate to report that a large number of Yuan troops had also been found outside the north gate, and they had moved extremely quickly, and now they had dropped many wooden boats in the moat, and they were about to build a pontoon bridge.

When Wu Anguo heard this, he shouted in his heart that it was not good, and hurriedly ordered the soldiers stationed at the Ximen Acropolis to stop shooting, and asked everyone to wait until Yuan's army began to ascend the city before counterattacking. When the anxious Wu Anguo ran to the north gate of the city, he found that the pontoon bridge of the Yuan army had been erected, and although the arrow rain on the city was dense, there was still a group of Yuan soldiers who rushed to the bottom of the city.

"Hey, what's that?" a small leader of soldiers not far from Wu Anguo's side suddenly let out a surprised voice.

Wu Anguo followed the direction of the little leader's finger and saw a few big black guys with wheels squeaking towards the pontoon bridge.

"Could it be that this is Yuan Jun's ironclad car?!" Wu Anguo exclaimed in his heart.

"Attention catapults! Immediately replace the thunderbolts, the target is the big iron cars under the city, and the five rounds are in a dense salvo!" The frightened Wu Anguo hurriedly gave the order to attack, but what he thought in his heart was that if those iron armored cars were allowed to drill into the city gate hole, then Linzi City would be dangerous.

After hearing Wu Anguo's order, the eight catapult launchers lined up on the left and right of the city immediately took out the boulders that were originally contained in the launch trailer, carefully picked up a few large black rumbling iron balls from under the dark wall, and then put them into the launch trailer.

"Distance correction complete!"

"Angle adjusted!"

"Report to the general, you can fire!"

"One shot, release!" Wu Anguo immediately ordered.

Eight large iron balls flew out of the city and fell backwards and forwards towards the five ironclad cars that were moving slowly outside the city, and then there were explosions one after another.

Crashing near the five ironclad cars, one of them smashed under the wheels of Yuan Jun's ironclad car, when the thunderbolt hit the ground and exploded, it immediately overturned the ironclad car to the ground, and then a large amount of gunpowder in the ironclad car was instantly ignited when it encountered high temperatures, and then there was a bigger explosion, which exploded like an earth-shattering explosion......

After one of the ironclad vehicles was ignited, the resulting heat and shock wave quickly ignited four other vehicles in the vicinity, followed by a third, more violent explosion.

The explosion gradually dissipated in the smoke of gunpowder, and Wu Anguo and the soldiers at the head of the city were already stunned by the huge explosion, and they looked at several large pits outside the city with dull eyes, and their minds were full of stumps and broken arms flying everywhere after the explosion, as well as the wreckage of ironclad vehicles that sputtered everywhere.

Yan Lianghe, who was waiting in the distance to take the north gate of Linzi in one fell swoop, also watched with an idiot as his ironclad car disintegrated in a heart-rending roar, and finally turned into a pile of ashes.

Whether it is the Qingzhou soldiers at the head of the city or the Yuan army under the city, they have fully understood the power generated by the explosion of a huge amount of gunpowder in the past, and in their minds, they may not forget the huge power and destruction of the world in this life.

The thunder used by the Qingzhou Army defending the city is the third-generation product produced by the Crouching Tiger Weapons Research Institute, this kind of guy with cast iron on the outside and high explosives on the inside, the biggest feature is that it is no longer like the first and second generations to ignite before launch, and when it flies in the air, it will drag a small tail with black smoke.

The core component of the third-generation thunderbolt is a device that can implode after being violently impacted from the outside, and this thing is said to be the latest achievement that Zhao Xing personally led a group of craftsmen to ponder for half a year. The biggest advantage of it is that you no longer have to worry about rainy and wet weather, and you can use it even if you install it on the paddle steamer of the Jin Navy!

Although the besieging Yuan army built ironclad chariots similar to those of the Jin Kingdom, they lacked soldiers who were skilled in using this weapon. The ironclad vehicles of the Jin State attacked the city at one time, and dispatched up to four vehicles, two of which were loaded with people and two with gunpowder, and approached the city gate in the order of one person, two medicines, three people, and four medicines, and they would definitely not be like Yuan Jun like five vehicles piled up and marched together.

The ironclad cars of the Jin Kingdom are identical in appearance, but the first car is generally built very strong, purely to attract the fire of the defenders of the city, the second car has only half of the charge, and half of the space is placed for the arquebus, the third car has the most charge, mainly for the task of blasting, and the last car is to transport the members of the demolition team back safely.

Jin Guo's meticulous division of labor, scientific formation, and reasonable operation process are not only mastered by the soldiers of the special operations brigade who are really responsible for the blasting of the city gate, but even Wu Anguo himself has no way of knowing. Yuan Jun, who didn't learn the essence, only knew how to draw a scoop according to the gourd, but he didn't expect to play a big oolong this time, and the first use of gunpowder caused huge casualties, but I am afraid that there will be a psychological shadow in the future!

An army with advanced weapons is not terrible, what is terrible is having an army that is skilled in the use of advanced weapons......