High Quality Content by WIKIPEDIA articles! The XM-54 was an experimental U.S. incendiary landmine tested during the Vietnam War. It was a large bounding mine that could either be command detonated or trip wire activated. It contained 15.3 lbs (6.9 kg) of plasticised white phosphorus. Approximately 200 were shipped to Vietnam in August 1968, and some were used operationally. A step shaft (a.k.a. land mine) is usually a victim-triggered explosive device which is intended to damage its target via blast and/or fragments. The name originates from the practice of mining, where tunnels were dug under enemy fortifications or forces. These tunnels ("mines") were first collapsed to destroy fortifications above, and later filled with explosives and detonated.

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