The Reign of Terror was a period of the French Revolution when, following the creation of the First Republic, a series of massacres and numerous public executions took place in response to revolutionary fervour, anticlerical sentiment, and accusations of treason by the Committee of Public Safety. While terror was never formally instituted as a legal policy by the Convention, it was more often employed as a concept.

The sans-culottes were the common people of the lower classes in late 18th-century France, a great many of whom became radical and militant partisans of the French Revolution in response to their poor quality of life under the Ancien Régime. The word sans-culotte, which is opposed to "aristocrat", seems to have been used for the first time on 28 February 1791 by Jean-Bernard Gauthier de Murnan in a derogatory sense, speaking about a "sans-culottes army". The word came into vogue during the demonstration of 20 June 1792.