The speed of the stress wave in the solid is much greater than that of the sound wave, so when the Japanese soldiers in the bunker heard the sound of the explosion, the debris of the stress wave had already flown there.

The fragment first touched the cotton clothes, it absorbed part of the kinetic energy of the fragments, but this was not enough to reduce the lethality of the fragments, the cotton clothes were torn apart in an instant, the fragments drilled into the flesh, and when they hit the skin, they broke up, and a large fragment was broken up into several small pieces, which undoubtedly increased the lethality of the fragments!

When these fragments passed through the human body, they left behind a large hole of flesh and blood, and the human organs inside the hole were all shattered! Whoever is struck will surely die!

In order to prepare for the defensive battle of Mukden, the Japanese army specially purchased a large number of machine guns to ensure that each bunker has one, so that each bunker is a machine gun position with great lethality, and each bunker has five soldiers, two machine gunners, who take turns to operate machine guns, two bomb suppliers, and one is an observer, which is used to observe large-area targets.

In this way, there is a certain overlap in the positions of the personnel, that is, one person can become a meat shield for the other, so there is a good hope that the bunker will remain lethal even if it is hit by armor fragments.

But not all the debris hit the people, those who did not hit the bunker hit the inner wall of the bunker at high speed, leaving large and small craters on the inner wall, changing direction and continuing to fly, although the speed was reduced after the impact, but still lethal, in this way, the debris is like weaving a web of death in the bunker, so that everyone has nowhere to escape.

Lin Yuan did not give artillery orders according to the convention, just like he had commanded the artillery of the Dingwu Army before, but gave a very flexible order, that is, the commander of the artillery assigned which artillery to hit which bunker, and the only requirement was that each bunker must be hit once.

On the area where Lin Yuan was preparing to attack, the Japanese army built forty-seven bunkers, so the Qing army specially prepared forty-seven observers, each responsible for one bunker, to report when the bunker was hit.

Lin Yuan waited anxiously, fifteen minutes after the cannon sounded, the artillery commander reported that all the bunkers had been hit, and Lin Yuan then ordered the first batch of fifty cavalry, divided into five routes, to attack the trenches behind the Japanese trenches.

Wu Yuankai heard Lin Yuan's order on the side, and thought in surprise: "In this case, aren't there too few people?" How can you attack it! ”

However, there was only one commander on the battlefield, and the situation did not allow Wu Yuankai to talk too much, only to see fifty cavalry leaping out of their horses and rushing towards the trench, they rushed in an arc, because if they rushed in a straight line, they would be easily killed and injured by the opponent!

The cavalry sortie was soon discovered by the Japanese, and two flares rose into the sky, reflecting the dark night with snow, and the fire from the muzzle of the guns in the trenches flickered like the stars in the night sky, but the effect of the rifles on the cavalry was too limited.

At this moment, strings of flames spat out from several bunkers!

It turned out that the fifty cavalry under Lin Yuan's order were the bait of these bunkers, and they just wanted to find out which bunkers had slipped through the net during the attack!

Lin Yuan made a gesture to the herald beside him, and the herald took out a shiny military horn and blew it, and when the cavalry heard it, they turned their horses and ran back.

A new round of shelling began on the artillery position, and those fish that had slipped through the net by exposing their positions were completely caught in this round of strikes!

Lin Yuan then ordered the mortar to attack the position under the Japanese bunker!

The body of the armor fragmentation bullet is thicker than the grenade of the same caliber, so that the armor fragmentation bullet can be filled with more explosives, not to mention that the armor fragmentation bullet developed by Lin Yuan and others is filled with black Suojin explosives, although it is made by the indigenous method, and its performance is worse than that of the black Suojin of later generations, despite this, its explosive power is far beyond the black powder and picric acid of the same era!

When Luo Chaoying presided over the manufacture of the armor shattering bullet, he also added materials to the Japanese on the bullet!

How did the original shell fragments come about? It all depends on the explosives in the warhead, and these explosives will produce as many pieces as the shell of the shell is blown into, and Luo Chaoying applied the advanced technology of ammunition design in later generations - fragmentation pre-control technology.

To put it simply, when making the warhead shell, use a turning tool to make some scratches on it, so that when it explodes, stress concentrations will occur in these scratched places, and the shell will be shattered first, which is equivalent to saving a large part of the energy of the explosion.

This technique is simple to say, but there are many specific problems when you want to use it, such as the location of the scratches, the depth, and how much, which all determine the number of fragments and the lethality of a single fragment, for artillery, of course, it is hoped that the more fragments under the condition of ensuring lethality, the better, but this is unrealistic, because there are too many scratches, the strength of the projectile body cannot be guaranteed, and the shell is likely to fly into the air and disintegrate.

There are a series of problems such as processing difficulty, processing time, cost, etc., which are difficult to use mathematical methods to obtain an optimal solution, in fact, not only weapons and equipment, almost all industrial systems are designed without an optimal solution, so the selection of design parameters depends on the experience of the designer, and experience is exactly what Luo Chaoying does not lack.

If the Japanese trenches were on flat ground, the pre-control shrapnel technique would be useless, because the shrapnel was flying upward, but it just so happened that the Japanese trenches were under the bunkers, and the shells hit the trenches, and the shrapnel fell on the heads of the Japanese soldiers like raindrops!

Ten minutes later, more than one hundred and twenty shells had already fallen on the Japanese position, and Lin Yuan then ordered that the artillery stop attacking and the cavalry attacked!

For a while, the iron hooves rolled wolf smoke, and the cavalry rushed towards the Japanese position, and the Japanese soldiers who were blown up by the shells were still wondering, why were the shells of the people so powerful today, a shell exploded, and the area covered by shrapnel was almost twice that of the original shells.

Man is not a machine, it is impossible to have no loss of combat effectiveness because he has not been killed by shrapnel and shock waves, in the process of shelling, the loud sound shakes people's ears, the pungent smoke weighs down people's breath, and there are clods of earth falling from the sky, almost making people think that they are in the end of the world, in this case, the troops who lack the will to fight will run away when the enemy's artillery sounds.

But the position is the Japanese Army, the will to fight is rare in the world, although it was blown up, still raised guns to fight back, although the Japanese army is strong, but they are facing Lin Yuan's command and Luo Chaoying's carefully designed shells!

The best weapon to deal with the cavalry is the machine gun, the Japanese watched the cavalry rush up, but the machine gun in the bunker behind them did not sound at all, and they were so angry that they jumped to their feet and scolded their mother.

In less than a minute, the soldiers of the Qing army rushed to the trench, a Qing soldier did not stop his horse, flicked the stirrup, jumped directly from the horse, aimed at a Japanese soldier and crashed over, the Japanese soldier instinctively raised his hand to block, was knocked to the ground by the Qing soldier at once, fell dizzy, the Qing soldier pulled out a knife, and gave the Japanese soldier under him a knife.

The soldiers of the Qing army were like snowballs, more and more, and soon, the outer positions of the Japanese army fell apart!