Punji stick
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The Punji stick or Punji stake is a type of a non-explosive booby trap. It is a simple spike, made out of wood or bamboo, placed upright in the ground. Punji sticks are usually deployed in substantial numbers.
Punji sticks would be placed in areas likely to be passed through by enemy troops. The presence of punji sticks may be camouflaged by natural undergrowth, crops, grass, brush or similar materials. They were often incorporated into various types of traps; for example, a camouflaged pit into which a man might fall (it would then be a trou de loup).
Punji sticks were sometimes deployed in the preparation of an ambush. Soldiers lying in wait for the enemy to pass would deploy punji sticks in the areas where the surprised enemy might be expected to take cover, thus soldiers diving for cover would impale themselves.
The tip of the punji stick was frequently smeared with feces, poison, or other contaminants to promote infection in the wound created by the sharpened stick penetrating the soldier's skin.
The point of penetration was usually in the foot or lower leg area. Punji sticks were not necessarily meant to kill the person who stepped on it; rather they were designed to wound the enemy and tie up his unit while the victim was evacuated to a medical facility.
In the Vietnam War, the Viet-Cong would also use this method to force the wounded soldier to be transported by helicopter to a medical hospital for treatment. The limb, which was infected, would have to be amputated twenty-four hours after contamination if not quickly treated. Since this caused American forces to call in a helicopter, it revealed the location of the fall-back point of the Americans or landing zone for the helicopter. The Viet-Cong would usually attempt to shoot down the helicopter.
Punji sticks were also used in Vietnam to complement various defenses, such as barbed wire.
