Viet Cong Booby Traps December, 1966 US Army Vietnam War from Staff Film Report 67-2

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Originally a public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.

The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).

https://en.wikipedia.org/wiki/Booby_trap

Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/

A booby trap is a device or setup that is intended to kill, harm, or surprise a person or animal. It is triggered by the presence or actions of the victim and sometimes has some form of bait designed to lure the victim towards it. The trap may be set to act upon trespassers that enter restricted areas, and it can be triggered when the victim performs an action (e.g., opening a door, picking something up, or switching something on). It can also be triggered by vehicles driving along a road, as in the case of improvised explosive devices (IEDs)...

During the Vietnam War, motorcycles were rigged with explosives by the National Liberation Front and abandoned. U.S. soldiers would be tempted to ride the motorcycle and thus trigger the explosives. In addition, NLF soldiers would rig rubber band grenades and place them in huts that US soldiers would likely burn. Another popular booby trap was the "Grenade in a Can", a grenade with the safety pin removed in a container and a string attached, sometimes with the grenade's fuse mechanism modified to give a much shorter delay than the four to seven seconds typical with grenade fuses. The NLF soldiers primarily used these on doors and attached them to tripwires on jungle paths.

The CIA and Green Berets countered by booby-trapping the enemy's ammunition supplies, in an operation code-named "Project Eldest Son." The propellant in a rifle or machine-gun cartridge was replaced with high explosive. Upon being fired, the sabotaged round would destroy the gun and kill or injure the shooter. Mortar shells were similarly rigged to explode when dropped down the tube, instead of launching properly. This ammunition was then carefully re-packed to eliminate any evidence of tampering, and planted in enemy munitions dumps by covert insertion teams. A sabotaged round might also be planted in a rifle magazine or machine-gun belt and left on the body of a dead NLF soldier, in anticipation that the deceased's ammo would be picked up and used by his comrades. No more than one sabotaged round would be planted in any case, magazine, or belt of ammunition, to reduce the chances of the enemy finding it no matter how diligently they inspected their supplies. False rumors and forged documents were circulated to make it appear that the Communist Chinese were supplying the NLF with defective weapons and ammunition...

https://en.wikipedia.org/wiki/Cartridge_trap

A cartridge trap is a type of booby trap devised by the Viet Cong and subsequently used against American and other anti-Communist forces supporting South Vietnam during the Vietnam War. It derives its name from the fact that the wounding component of the trap is a small arms cartridge...

Design

It is a very simple trap, made from four main components: a bamboo pipe, a piece of wood, a nail and a small arms cartridge. The device required a cartridge to be stood upright and when a person (usually a soldier) stepped on the trap, the pressure placed on the bullet would force it down onto a nail, igniting the primer and subsequently causing the round to fire.

Purpose

The intent of the trap was to cause the round to travel through an enemy soldier's foot, causing him and probably his entire section to cease their actions in order to treat him. This would often create an opportunity for a Vietcong (or other North Vietnamese force) to engage the stationary section in an ambush...