Sabotage
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Sabotage is a deliberate action aimed at weakening a polity, government, effort, or organization through subversion, obstruction, demoralization, destabilization, division, disruption, or destruction.
Unauthorized stencil urging sabotage and picketing
World War II poster from the United States
Japanese experts inspect the scene of the "railway sabotage" on the South Manchurian Railway in 1931. The "railroad sabotage" was one of the events that led to the Mukden Incident and the Japanese occupation of Manchuria.
United States World War II-era poster warning against sabotage
Silent Unseen
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The Silent Unseen were elite special-operations paratroopers of the Polish Armed Forces in the West, created in Great Britain during World War II to operate in occupied Poland.
Monument to the Silent Unseen in Dębowiec
Cichociemni after delivery to Home Army Radom-Kielce inspectorate, 22 September 1944
Silent Unseen of a Home Army Kedyw unit, Radom-Kielce Home Army area, 1944