A land mine is an explosive device designed to be placed on or in the ground to explode when triggered by an operator or the proximity of a vehicle, person or animal. The name originates from the practice of sapping, where tunnels were dug (much like mining) under enemy fortifications or forces. These tunnels ("mines") were first collapsed to destroy fortifications above, and later filled with explosives and detonated. Land mines generally refer to devices specifically manufactured for this purpose, as distinguished from improvised explosive devices ("IEDs").
Land mines are used to secure disputed borders or to restrict enemy movement in times of war. Tactically they serve a purpose similar to barbed wire or concrete dragon's teeth vehicle barriers, slowing or channelling the movement of attacking forces to the advantage of defenders. From a military perspective, land mines serve as force multipliers, because they increase the efficacy or potency of a force without requiring more personnel.