Soon, the military weapon supervisor sent someone to inform Li Shimin about the invention of the cannon. He also said a few words quietly that after the cannon was invented, the veterans might be able to retire. Because of the invention of this cannon, the main forces in the future fighting may be firearms, not the cold weapons of the past. After Li Shimin heard that those veterans could retire, he did not dare to neglect them, so Li Shimin brought many generals to the test ground of this weapon to watch the cannon. After these few days, Jing Wen had mastered the dosage of the flying thunder cannon, so there was no need to worry at all. As for taking advantage of this time, Jing Wen also specially studied a small cannon that can be used for small troops.

"Your Majesty, generals, you have come here, which means you have witnessed the beginning of a new era. So, you can take a good look. The beginning of this new era will surprise you!" Jing Wen said.

"Don't be so shocked. Let's see what it is. You boy said that if you invent these things, the tactics of the past will be truly outdated. We should see if you have the ability to gain points and say this." Cheng Yaojin said.

Jing Wen immediately said: "My father-in-law, you have been fighting on the battlefield for many years. In the future, you should wait at home to enjoy your grandchildren, and then leave the battlefield affairs to us young people!"

"What? My old Cheng can still hold up an eighty-pound axe to fight against the enemy. Do you want me to enjoy my grandchildren's care?" Cheng Yaojin asked angrily.

Jing Wen smiled without saying a word and brought everyone to the front of Fei Lei Cannon.

When everyone looked at this thick-caliber flying thunder cannon, they didn't know what it was.

"Son-in-law, what is this?" Cheng Yaojin asked.

Jing Wen immediately said: "My father-in-law, if you have this, even the most solid city wall in this world will be gone. In the future, our Tang Dynasty will not have to build a city wall. Because in front of this thing, any city wall is meaningless."

"What do you mean?" Cheng Yaojin asked.

Li Shimin also pointed to the distance and asked, "Jing Wen, is this a city wall you imitated?"

"Yes, Your Majesty! I copied this based on the city wall of Chang'an City, but this wall is only ten meters and is not too big. This is mainly used to test the power of our cannons. At that time, everyone can see the power of this flying thunder cannon and know why I said that building a city wall is useless." Jing Wen said.

Soon, the gunpowder technicians were busy preparing for everyone to watch the performance of the flying thunder cannon. The performance of the flying thunder cannon was very shocking, and even the most powerful of these cannons was the flying thunder cannon. Jing Wen specially arranged the first show, so he wanted to shock the veterans. If they did not let them know the martial arts they learned, everything was outdated, I would probably not believe it at all.

"boom!"

With a shocking sound, a burst of smoke began to rise from the city wall three hundred meters away, which was obviously shaken by the explosion. Li Shimin and the generals were all shocked by this sound, and it was obviously because the sound was too loud to make them clear. Not long after, after the smoke and dust disappeared, Jing Wen took everyone over to see the results of the flying thunder cannon.

"Oh my God! The city walls have collapsed by 30%!" Li Shimin exclaimed in surprise.

In the distance, the city wall that simulates the city wall of Chang'an City actually collapsed 30% in one shot, which is one third. This is just a shot effect. This shocked Li Shimin enough. Li Shimin claimed to have been in a lifetime of military service, but he had never seen such a situation. Usually, the city walls of Chang'an City and ordinary stone casters could not damage the city walls of Chang'an City. Even Jing Wen used a blasting missile. At least hundreds of missiles had to hit one place at the same time to have such an effect on the city walls of Chang'an City.

Therefore, this is also the reason why no one ignores the effect of the city wall. Originally, when Jing Wen attacked Dingxiang City, the reason why the city wall was able to collapse was because at least one county-level city wall, and the Turks did not pay attention to the city wall, so they were disrepaired for years, which caused the missile to collapse. But now this is a city wall that simulates Chang'an City, not a soft persimmon, but it collapsed one-third of it after a shot. This is amazing.

Jing Wen was not surprised because the caliber of this flying thunder cannon was more than 300 millimeters. Although it was all the most primitive black gunpowder, this was also the recipe that Jing Wen arranged for the advanced gunpowder technician Yuan Hua to perform the optimal optimization, so the power was very huge.

The cannon with a caliber of more than 300 mm is no less than the gunpowder of later generations, so it is completely possible to collapse one-third of the city walls of Chang'an City with one cannon.

"Your Majesty, look, if we have this flying thunder cannon, then we may not have any unconquered city walls in the future. Any city walls that block our roads will be destroyed by our flying thunder cannon. Moreover, those so-called fortifications cannot withstand the bombardment of the flying thunder cannon, so you should know why I said I don't need to build a city wall, right?" Jing Wen said.

"Long live my emperor, there will be no city wall that cannot be conquered in the future. Then my Tang Dynasty will definitely be able to sweep the world!" A civil servant came to flatter him immediately.

After all, these civil servants don’t care about anything that these military officers who rely on martial arts will further lose their status. They just think that with these weapons, the Tang Dynasty will be fearless and no foreign tribe can defeat themselves. And then they can only defeat others themselves, and others will not want to defeat themselves. This is the difference between politicians and military strategists. Once the military changes occur, the older generation of generals will be forced to retire and retire, after all, they can no longer be used.

Now Cheng Yaojin and the others are even more sarcastic. They originally thought that missiles had been invented, but it would take some time for the firearm to really squeeze them out of the army. But this thunder cannon just shows that the progress of the firearms is getting faster and faster, which makes them unable to keep up. These veterans may not be too late to learn how to fight firearms again, because their age is no longer enough. (To be continued, please search for Astronomy, novels are better, updated and faster!
Chapter completed!