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false flag

Updated May 23, 2026

A covert operation designed to disguise its true perpetrator by making the act appear to have been committed by another party.

A false flag operation is a covert act designed to appear as though it was carried out by a party other than the one that actually executed it. The term originates from naval warfare, where ships would sail under an enemy's or neutral country's flag to deceive opponents before attacking — a practice regulated (and in combat, prohibited) under the laws of naval warfare.

In modern usage, false flag operations span several categories:

  • Military deception: staging an attack to justify retaliation or invasion. A frequently cited historical case is the 1939 Gleiwitz incident, in which SS operatives staged an attack on a German radio station and dressed casualties in Polish uniforms to provide a pretext for Germany's invasion of Poland.
  • Intelligence operations: an agency conducts sabotage, assassination, or recruitment while posing as a different state or non-state actor to mislead attribution.
  • Domestic political operations: staging unrest or violence and blaming a rival faction.

False flag claims are also a common feature of disinformation and conspiracy discourse. Major terrorist attacks and chemical weapons incidents — for example, the 2017 Khan Shaykhun and 2018 Douma incidents in Syria — have been the subject of false flag allegations by various governments and commentators, though investigations by the OPCW attributed responsibility differently. Analysts should distinguish between documented false flag operations, plausible but contested allegations, and unsupported conspiracy claims.

Under international humanitarian law, perfidy — including the improper use of enemy flags, emblems, or uniforms in combat — is prohibited by Articles 37–39 of Additional Protocol I (1977) to the Geneva Conventions. Ruses of war that do not involve perfidious deception remain lawful.

For MUN delegates and researchers, the term should be used carefully: it carries strong evidentiary weight and is frequently weaponized in propaganda. Sourcing should rely on declassified records, judicial findings, or credible investigative reporting rather than circumstantial inference.

Example

In the 1939 Gleiwitz incident, SS operatives staged an attack on a German radio station and blamed Poland, providing Nazi Germany a pretext to invade days later.

Frequently asked questions

Improper use of enemy flags, insignia, or uniforms during combat constitutes perfidy and is prohibited under Articles 37–39 of Additional Protocol I (1977) to the Geneva Conventions. Lawful ruses of war remain permitted.
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