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In page Guerrilla warfare:

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Sabotage against infrastructure, such as power stations, airports and reservoirs at the upper end, and for example electricity pylons, substations, telephone exchanges and railway tracks at the lower end make real to the populace that an insurgency is underway; and if sustained can affect the quality of life of the populace.[citation needed] Sabotage was notably used by a variety of forces during the Second World War, the Malayan Emergency, the Vietnam War, the Soviet-Afghan War, and the Nicaraguan Revolution and reactive Contras Insurgency.