In order to fill the moat, the siege often dispatches chariots that are both offensive and defensive to carry soldiers, and let the soldiers hide in the chariots and throw sandbags into the moat to fill the moat.

It is of course more convenient if there is no water in the moat, but this large-scale pit itself requires a large number of sandbags to fill, and it cannot be completed overnight.

Especially the siege will never ignore it.

Therefore, the vanguard can also be allowed to cross the river and start siege the city first to attract the firepower of the defenders, distract the defenders' attention, and help the rear river filling troops complete the river filling work as soon as possible.

At present, this is the combat strategy of the Jin army.

Although there is no water flow, the ditches still exist. If you can't jump over and fly over, you still have to attack by using the usual means of crossing the moat.

The army approached the moat and pushed the six trench bridge vehicles forward to build a river crossing passage, providing a road for soldiers to cross the river.

A large number of chariots were dispatched to approach the moat, and the soldiers in the chariots were protected by the roof cover. The soldiers began to throw heavy sandbags into the moat in order to fill them up as soon as possible.

At this time, the crossbowmen at the head of the Restoration Army also began to act.

The dense rain of arrows followed the big arrows fired by the crossbow, and the stones fired by the catapults slammed down, working together to give the Jin army a headache.

Many exposed Jin soldiers were killed by arrows. Their bodies would not be recycled. It would be best if they fell directly. Those who did not fall would be pushed down from the river ditches by people behind them for use as a pit filling.

The Jin army was not without defense. In addition to setting up wooden curtains to defend, they also sent a large number of crossbowmen to shoot arrows at the city wall to suppress fire.

In this case, the crossbowmen of the Restoration Army had a good geographical advantage and had a great advantage. They would also set up wooden curtains as defense to protect the crossbowmen from harm as much as possible, and then shoot arrows.

When the two sides shot at each other, the losses of the Jin army significantly exceeded the losses of the Liberation Army, but their number was far more than that of the Liberation Army, so they could still struggle to support them in the rain of arrows.

The Restoration Army used bed crossbows and catapults to fire arrows and stone bombs to attack the siege equipment that covered infantry's ditches to fill rivers.

However, these siege equipment are well-made, of good quality, and have quite heavy defensive facilities. Stones and arrows are difficult to destroy, let alone ordinary arrows.

Under the protection of these siege equipment, the Jin soldiers quickly carried out the command of the chief general, and a large number of sandbags were thrown into the moat.

Although the moat in Hejian City is very wide and deep, it cannot be done with the Jin army's huge manpower and material resources.

There are many people and many sandbags. If this continues, the moat will not be able to withstand such a large number of sandbags. It will not take long for the moat to be filled and lose its role in protecting the city.

Therefore, the city guards will never watch and react without any response.

In addition to the stones thrown by the trencher and the arrows fired by the bed crossbow, Jiang Liangping decided to use firearms for such a sharp siege by the Jin army.

Fire attack is a very ancient way of siege, and it is also an ancient way of defending the city. The siege equipment is basically made of wooden and cannot be smashed, but once a fire is burned, it will be gone.

Therefore, huge siege equipment is often equipped with a considerable degree of fire protection facilities, including but not limited to mud on the surface of the siege equipment, so that the flames cannot achieve the burning effect.

Nowadays, firearms mainly use combustion rather than explosion as attack methods. All defensive weapons are also targeting defensive transformations made by burning firearms.

However, the firearms of the new equipment of the Liberation Army that Jiang Liangping decided to use were not burning as the main means of attack.

In this battle, Su Yonglin took out all the firearm reserves he had worked hard to collect and manufacture.

The manufacturing and reserve of gunpowder is not easy. The manufacturing and collection costs of using tinder are quite high. Su Yonglin's toilet commando almost ran all the toilets that can be found.

Despite this, gunpowder production is difficult to increase.

According to previous estimates, the firearms made of gunpowder that Su Yonglin had accumulated over the past year would be consumed in this war.

He handed over one fifth of all the firearms and gunpowder reserves to Hejian City, and the other one fifth to Zhending City, keeping one fifth himself, and the remaining two-fifths are evenly divided by other cities.

Hejian City and Zhending City are of great significance and are the core cities that the Jin army will inevitably attack. It is natural to be equipped with top-level defense tools.

When the stones and giant arrows were unable to further block the Jin army's siege, he would take out his firearm to make further attacks.

With a command, the soldiers put rockets on the bed and fireballs on the catapult.

The use of rockets was used when the Restoration Army Navy attacked the Jin army, and achieved good effects, causing great deterrence and damage to the Jin army.

The explosive performance of the gunpowder after raw material ratio adjustment and granulation treatment is much stronger than the Jinjun powder-like and paste-like black gunpowder obtained by Su Yonglin, and it is not even the same thing in terms of use effect.

Su Yonglin asked the gunpowder craftsmen to increase the content of nitrate in the gunpowder formula to 70% when making gunpowder. They then pelletized the gunpowder with urine. After that, they conducted an explosion test and found that the gunpowder with increased nitrate content was more powerful when it exploded.

After granulation, the gunpowder burns more fully, and the double buff superimposed, the power becomes larger and the sound becomes louder. The fireball suddenly doesn't look like a traditional firearm with the purpose of combustion, but has the smell of a powerful bomb.

In order to increase the power, the craftsmen added some gravel and iron scraps left over from the weapons to increase the lethality of the firearm.

After the rocket test used for the bed crossbow was successful, the fireball used in the trench was also put into experiments.

The spherical firearm is not something new, but Su Yonglin made it bigger, filled with more gunpowder, and more powerful when exploded.

Because the accuracy of the catapult is really not very good, sometimes the target of the attack can be a thousand miles away from the predetermined target, and the lack of projection means is also a very important limiting factor in the use of firearms.

So when the craftsmen were experimenting with trenchers to shoot fireballs, Su Yonglin asked them to make a wooden bottom support for the fireballs.

The wooden base supports are in the shape of the fireball, and the whole is tied with a belt to form a whole, which is safer when transported and has a good effect when used.

The fireball of this device is heavy and light at the same time. When thrown out, it can have an effect similar to the self-stabilizing structure of the badminton. It will not change the direction and fly to any strange place. It will generally move forward and head towards the enemy.

Because of the low accuracy of the early guns, smart craftsmen used this method to increase the accuracy of the guns, so that solid bullets could hit the target steadily and accurately.

This is one of the few early firearm knowledge that Su Yonglin knew, and it is just right for use.

After several tests, it was proved that this device is effective, with much better accuracy than before, and the landing point is more controllable, so the fireballs produced next are in this state.

Rockets, fireballs, and flying muskets are three types of firearms that Su Yonglin approved the army to try with certain security. They are also three types of firearms that can be mass-produced by the Restoration Army. In addition, there are no other firearms available for use.

These days, there are indeed a variety of firearms, but there are many types, but their practicality is very poor.

Either the operation is too cumbersome and difficult to use in the last battle, or the safety is too poor, and the damage to one's own people is greater than that to the enemy, or the cost is too high to afford it.

It is not easy to create an affordable and relatively simple firearm.

However, once it is completed, that is, the new weapons that the Jin army cannot possess or counteract, will have a relatively large deterrence to the Jin army, especially the granularization of gunpowder. If there is no expert telling Wanyan Liang like this, how can Wanyan Liang think of how to deal with it?

Technical barriers.

Jiang Liangping has seen the use of these firearms and is very optimistic about the effectiveness of these firearms. Although the danger is the same, compared to its power, the danger is to be placed in the back.

It was useless before, because the Jin army did not enter the attack range in large quantities.

Now the Jin army has entered the attack range in large quantities, and even some siege equipment has entered the attack range. It is time to use firearms to open their eyes, or to seriously see if these firearms have good effects on the real battlefield.

If the effect is available, it can be loaded into the army in larger batches and used as subsequent strategic weapons.
Chapter completed!