At the beginning of World War II, according to historical records, 70% of the soldiers who died on the battlefield died from fragments of explosives such as torso stray bullets, shells, grenades or mines. In order to improve the battlefield viability of soldiers, Britain began to develop bulletproof jackets made of high-manganese steel in 1942, followed by the United States. With the popularity of bulletproof clothing, the combat effectiveness of soldiers has doubled, effectively reducing the damage caused by a hail of bullets to soldiers.
 
Friends who often watch World War II-themed war movies or modern police blockbusters have noticed that soldiers were shot by enemy bullets in the line of duty, but were not hurt because they wore bulletproof vests ahead of time. So some friends are curious. Is there really such a powerful bulletproof vest on the battlefield? After the bullet hit the human body, the target was unscathed? The answer is no, the movie is a lie, many partners may not believe it.
 
Bulletproof vest, it can't really be bulletproof, or it can't prevent any bullets. As we just said, bulletproof vests are designed to avoid unnecessary casualties caused by stray bullets and injuries on the battlefield. The role of bulletproof clothing is only to cushion the powerful impact of fast bullets, but can not completely prevent any type of bullet attack. Just like a low-speed bullet of an ordinary pistol, if hit, the human body will basically only feel pain and bruise, just like being hit by a wrench and will not hurt life.
If it is powerful rifle bullets, machine gun bullets or other powerful armor-piercing bullets, multi-head bullets, incendiary bombs, air explosive bombs and other ammunition, if soldiers wearing bulletproof vests, bulletproof vests will basically be pierced and soldiers' bones will be broken. Even if the bulletproof vest is not worn, the powerful impact can cause dizziness and severe internal damage to the target, resulting in visceral bleeding and death.
At present, there are three main types of bulletproof in the world: 1: fiber bulletproof, pistol hit, will not be pierced, but bulletproof clothing will deform and rebound, human pain is greater, clothing is very light, only 4-6 gold. two。. Thin steel plate bulletproof, pistol bullets will not be pierced, will be embedded in the steel plate, but the clothes are very heavy, about 40 kilograms. 3. Cermet bulletproof, bulletproof effect is better than the former two, hit by a pistol, less pain, is a kind of composite bulletproof clothing.