In the modern battlefield, the casualty rate of shrapnel caused by artillery, grenades, rockets, grenades and landmines has gradually increased, accounting for 67% to 75% of the total casualties, and deaths in the head, chest, and abdomen accounted for 82% of them. 87%, far exceeding the death rate of the limbs. Medical statistics show that the protection of the head, chest, and abdomen, which account for only 39% of the body's surface area, can greatly reduce the casualty rate, and body armor and bulletproof helmets can protect these keys. The role of parts. The United States claims that in the Second World War, equipped with steel helmets protected the lives of at least 70,000 U.S. troops. The United Kingdom believes that wearing body armor can reduce the injury rate by 27% and the death rate by 40%. In view of this, World War II After that, individual helmets and body armors have been developed rapidly.
