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Reference.org
Perfidy
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<p>In the context of <a href="/facts/War/MPluTbJ0">war</a>, perfidy is a form of <a href="/facts/Deception/ADLUf5ts">deceptive</a> tactic where one side pretends to act in <a href="/facts/Good_faith/oSeufTYc">good faith</a>, such as signaling a truce (e.g., raising a <a href="/facts/White_flag/JWE5fJLb">white flag</a>), but does so with the deliberate intention of breaking that promise. The goal is to trick the enemy into lowering their guard, such stepping out of cover to accept a supposed surrender, only to exploit their vulnerability. </p><p>Perfidy constitutes a breach of the <a href="/facts/Laws_of_war/utYdPbBD">laws of war</a> and so is a <a href="/facts/War_crime/36qQAugC">war crime</a>, as it degrades the protections and mutual restraints developed in the interest of all parties, <a href="/facts/Combatants/owQ3fXXe">combatants</a> and <a href="/facts/Civilians/ApBkSzGP">civilians</a>. </p>