Directional anti-infantry mines, as a mass killer against the impact of infantry groups, were formed in the United States, but originated in Nazi Germany.

During World War II, the scientist of Nazi Germany, Hubert . Erding discovered that when explosives are detonated behind a curved steel plate, most of the impact force is applied perpendicular to the steel plate when the explosive is detonated.

During the explosion, the concave surface of the steel plate will form a high-speed penetrating body, and its destructive ability is very amazing.

However, the German weapons experts at that time did not think of making it into a directional mine, but only added it to the mine structure to increase its explosive lethality, and named it the discovery - the Misnay-Scharding explosion effect.

It was not until the end of World War II, with the rapid collapse of Germany, that the technology finally fell into the hands of the Allies at the time.

The United States, which only joined in the latter part of World War II, as the victorious country with the least loss of national strength at that time, naturally seized a large amount of "cake".

A few years later, when the Korean War broke out, the "United Miscellaneous Army" led by the US Army was overwhelmed by the infiltration tactics of the Volunteer Army, that is, an enhanced version of "guerrilla warfare."

The American soldiers were always worried that the elusive volunteer soldiers would suddenly emerge from some corner and rush to their positions.

In order to hold their ground, the "combined miscellaneous army" desperately wanted to obtain a weapon of close-range lethality that could contain this situation.

So, someone thought of Hubert. A mine designed by Erding.

At that time, both the United States and Canada came up with their own designs, but in the end it was the American Norman Mae Lauder.

His design was more advanced, replacing steel plates with steel balls, replacing the shell material with plastic, weighing only 1.1 kilograms, and the original experimental model was the "T48 mine".

After entering the equipment sequence of the U.S. military, it was named "M18 anti-infantry directional mine", which is also recognized by the academic community as the first official anti-infantry directional mine.

After four years of continuous efforts, the improved model "M18A1", which is equipped with 700 steel balls and has a maximum killing distance of 250 meters, was officially finalized and equipped with troops in 1960.

Although at this time, the Korean War had long ended, but in another "monkey civil war", the M18A1 directional mine was known to the world in one fell swoop for its terrifying lethality.

In this regard, the "broadsword mine" is famous, and popular all over the world, and has been imitated by various countries.

The Chinese version of the "Broadsword Mine" is equipped with 800 1.2mm steel balls, the model is a Type 66 directional mine, and the color is dark green.

Compared with the lofty name of the broadsword mine, Xingfeng prefers to be called "watermelon skin"!

Therefore, its color, coupled with its curved figure, is inserted there, and it is especially a piece of watermelon skin that stands up.

The effective killing surface of the "Broadsword Mine" is 120 degrees, the concentrated killing surface is 60 degrees in the middle, the optimal killing distance is 50-55 meters, and the killing height is about 2.4 meters.

According to the method of use in memory, Xingfeng walked to a position about 15 meters away from the first trick and extended 50 meters to the rear.

Open the carrying bag and take out the mine, arc to face the road, locate it through the aiming hole above, insert the lower bracket into the grass, and arrange the first "watermelon skin".

Then he walked forward more than ten meters and set up a second "watermelon peel".

Next, it's time to install the initiating device!

The M18A1 directional mine has two sets of firing systems, one electric fuse and one pull fuse.

In certain cases, the drawing fuse can also be changed to "tripping" or "pressing".

According to the current terrain conditions, combat needs, and cooperation with subsequent attacks, the most suitable detonation method is undoubtedly "pulse electric launch".

The earliest detonation method of this broadsword mine was a battery ignition system, which was later changed to an "M57 ignition machine" because the battery was extremely easy to break.

This thing sounds very lofty, but it's actually a small generator that can generate a 3V impulse voltage by pressing the handle three times in a row, which can be used to detonate an electric detonator.

A pulse ignition, a pressurization device, an electric detonator, about 91 meters of wire, these are all the accessories of the Broadsword mine.

The pressurization device does not need to be installed when it is single-shot, and is specially prepared for "one fire and multiple shots".

The torture wind needs to stretch the front, and the 91-meter wire is obviously not enough, and this thing can just come in handy.

Unscrew the soft plug in the detonator chamber above the "watermelon skin" and carefully install the electric detonator.

Then the foot wire of the electric detonator is led out of the wire hole at the top of the detonator chamber plug and connected with the wire.

Then put the wire cloth next to another "watermelon rind", cut off the excess wire, and connect the cut port to it in the same way.

This connection method is a parallel mine commonly used by the troops!

At this point, there are about 170 meters left of the wires of the two "watermelon peels", plus 50 meters between them and the road, which stretches the front to 220 meters.

And this seemingly very close distance, not close or far, is exactly the ideal interception distance in Xingfeng's battle plan.

The Type 58 twin anti-aircraft machine gun fires at this position, and the ricochet and stray bullets will be greatly reduced, and both lethality and accuracy can be maximized.

At the same time, it can also ensure that during the sneak attack, it can perfectly cooperate with the thunder and the "watermelon skin", and a wave of devastating moments will explode and catch them off guard.

The wires were arranged along the way, the end was connected to the pressurization device, and finally connected to the ignition, and the installation of the two parallel "watermelon peels" came to an end.

The original bulging tactical backpack has also become more than ten pounds lighter because of the lack of a large number of bombs.

"Trick thunder plus directional mine, a minefield lasting more than 60 meters, should be enough for you to drink a pot, now, only the last job is left, whew~."

Xing Feng wiped the fine sweat from his face, looked at the road where he couldn't see the abnormality, let out a long breath, and turned to walk towards the pickup truck.

Placing the land artifacts and camouflage the pickup trucks is the last and most important part of the job.

Drive the car next to the ignition, climb into the rear compartment, and aim the muzzle of the Type 58 twin anti-aircraft machine gun at the rear of the minefield.

Then replace a new set of magazines, push the bombs, and keep them ready to fire.

The nearby grass is only about 1 meter high, and it can't hide the body of the pickup truck, but it can be clearly seen even from a kilometer apart in this flat grassland.

And the best way to camouflage the pickup is the trick that Xingfeng used before - camouflage on the spot.

Camouflage with whatever plant terrain there is nearby, this is the best way to camouflage temporarily, there is no one.

In addition to various herbaceous plants, the grassland is mostly low trees and clumps of shrubs.

It took more than an hour for Xingfeng to cut down and move around, and finally completed the camouflage of the pickup.

At first glance, the pickup truck, which is covered by countless shrubs, is almost indistinguishable from the bushes that can be found everywhere in the grassland.

It's not obtrusive, it's not flashy, but it's extremely camouflaged!

"It's 9:35 a.m., calculate the time, they should be almost there, I don't know if I will be surprised by this big gift, will they be surprised."

Covered with all kinds of leaves and grass clippings, and soaked with sweat, the torture wind not only did not get tired, but showed a strange smile.