And the so-called infantry and artillery coordination, in fact, Jingwen also has a general understanding. And if you want to coordinate with the infantry and artillery, you must determine a "C" time. And the time of the so-called "C" is the time when the infantry occupies the first line of positions. In other words, it was the time when the infantry rushed to the enemy in front of the forward position. And when the artillery is charging infantry, it is necessary to start artillery preparation and suppress the enemy's fire. Of course, the Goguryeo people did not have artillery in this era, so the pressure on the artillery was much lower, as long as the artillery was driven off the tower.

As for the artillery preparations, the infantry began to charge until the castle tower was captured. Once the infantry charge is captured, the cannon can be gradually extended to the rear to strike at the enemy's living forces and prevent the enemy's living forces from resisting. And this time to grab the city tower, in fact, it is almost the same as a beach-grabbing landing, but the means are much simpler than the beach-grabbing landing. It is necessary to send the first batch of death squads to the top of the tower, and then hold the tower, so that the second group of troops can gradually rush up and strengthen the guard.

After about three hours of training, everyone finally mastered the so-called "C", so that they could relatively perfect the battle.

"You remember, the first batch of infantry led by your Dugu Mou must occupy and rush up to the city tower when the hourglass is finished, and the artillery must also extend the artillery fire when they are close to the city wall, that is, when the hourglass leaks to a third of the time, everyone should not have any accidents, once there is an accident, I am afraid that they will accidentally injure their own people." Jingwen said.

"Yes!" Dugumou and Zhou Bin said.

Soon, both sides also began to prepare for the first actual combat of infantry and artillery coordination. And this actual combat is very risky, and they don't have any previous experience, so they don't know if they can succeed. The control of time by the infantry and artillery coordination must be very accurate, but in later generations, there were accurate clocks such as watches that could calculate time, but there was nothing so precise in this time and space. So Jingwen finally found an hourglass, which can then be used to calculate time.

According to the previous plan, after the hourglass drained the sand. The first soldiers led by Dugumou must occupy the tower. At this time, the Goguryeo infantry was suppressed under the tower, and it was impossible to resist. Once the tower is captured, the artillery will also begin to extend its fire, and then continue to cover the infantry.

As for Dugumou's first batch of infantry, the responsibility is to hold the tower, and then let the second group of infantry climb up. After the second group of infantry climbs up, it will also be possible to increase the garrison. Then climb up continuously, and finally achieve the goal of occupying the city.

This is actually not much different from the traditional siege method, and the only difference is that when your own soldiers are attacking the city, there is actually artillery to cover. And with artillery to cover the siege troops. That is to say, it can be a good way to avoid being attacked by the enemy's defending forces, so that it can also occupy the city tower smoothly, and then the rear will continue to come to support.

"General artillery preparation, with shotguns!" Zhou Bin shouted.

Zhou Bin also had a stern face, if the coordination of artillery and infantry failed this time, then he, the commander of the artillery regiment, would definitely be sent to the Judge Advocate General. After all, if his own artillery fire hurts his own people, it is really a great crime, and I am afraid that he will have to carry this black cauldron. However, Zhou Bin didn't care too much, after all, he thought that infantry and artillery coordination must be the trend of the future. If it can be proven that the infantry and artillery coordination can be successful. As one of the inventors of the Infantry Gun Synergy, he will definitely be able to reuse it in the future.

The change in the mode of warfare means that a group of old-fashioned officers will be kicked out of the battlefield and replaced by a group of people who have adapted to new tactics and new ideas. And after the invention of firearms from Jingwen. In fact, there have been quite a few old-fashioned officers who have been like this. And the rest of the senior generals are also eating their old books, relying on the face of the founding fathers to make a living. Even Li Jing, the god of the Tang Dynasty, is about to retire, I am afraid that after the end of this expedition to Goguryeo, that is, when Li Jing retires. This is also eliminated by history. Because new tactics have emerged, those officers who have adapted to the old tactics have to be gradually replaced.

If Zhou Bin can become the inventor of the infantry artillery coordination tactic and prove the tactic that can work. Then he will definitely be able to reuse it in the future. And the coordination of infantry and artillery is definitely a big invention, this is beyond doubt. After all, being able to charge while covering with artillery can be said to be invincible. In this way, even if it is not a siege in the future, artillery can be used to fight, which is very helpful for future operations.

"Three! Two! One! Fire ready to begin! Zhou Bin said.

"Bang bang ......" artillery began to fire shells.

And Jingwen also began to turn the hourglass upside down, and the hourglass began to leak. And this hourglass process will take about twenty minutes, so this fire preparation will be suppressed for twenty minutes to ensure that there will be no enemies on top of the enemy's castle tower.

"Wow......"

The Goguryeo troops on the tower of Anseong began to suffer casualties, but the Goguryeo troops were prepared and retreated from the tower as soon as they began to be attacked by such shotguns.

"Start drenching!" Yang Wanchun shouted.

According to Yang Wanchun's experience, once the enemy began to fire this kind of shotgun, the next thing was the kind of bomb that could explode, so Yang Wanchun began to order to drench water, so as to avoid the kind of cannonball that could explode on the city tower and gradually blow up the city wall.

"Bumper ......"

The cannon was still firing shotguns, not flying thunder cannons, and it was clear that they were trying to suppress the fire, not to blow up the walls.

"Huh? What exactly does Tang Jun want to do? They don't use weapons that can explode, why do they keep using such small particles? We've pulled our troops down, but why are they still firing? Don't they know that this is a waste of weapons? Yang Wanchun thought in surprise.

And Yang Wanchun didn't have anyone who could solve his doubts, so he didn't know that Jingwen was coordinating with the infantry and artillery. Although Yang Wanchun's brain is very shrewd, once he surpasses the experience he has learned, then he may not be able to familiarize himself with the corresponding things. He was also just familiar with this kind of cannon, and he didn't know how to use this kind of cannon, so he didn't understand why Jingwen wasted shells for useless bombardment. (To be continued......)