Revolutionary terror (also referred to as Revolutionary terrorism, or a reign of terror) refers to the institutionalized application of force to counterrevolutionaries, particularly during the French Revolution from the years 1793 to 1795. The term Communist terrorism has also been used to describe the revolutionary terror, from the Red Terror in the Russian Soviet Federative Socialist Republic (RSFSR) to the reign of the Khmer Rouge, and others.

In contrast the reactionary terror, such as White Terror, has been used to subdue revolutions.[citation needed]

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