A sit-down strike is a labour strike and a form of civil disobedience in which an organized group of workers, usually employed at factories or other centralized locations, take unauthorized or illegal possession of the workplace by "sitting down" at their stations. By taking control of their workplaces, workers engaged in a sit-down demonstrate their power, build solidarity among themselves, prevent the deployment of strikebreakers or removal of industrial equipment, and cause cascading effects on the chain of production within and between factories. However, sit-down strikes are illegal in the vast majority of countries, complicating their use.

Strike action, also called labor strike, labour strike and industrial action in British English, or simply strike, is a work stoppage caused by the mass refusal of employees to work. A strike usually takes place in response to employee grievances. Strikes became common during the Industrial Revolution, when mass labor became important in factories and mines. As striking became a more common practice, governments were often pushed to act. When government intervention occurred, it was rarely neutral or amicable. Early strikes were often deemed unlawful conspiracies or anti-competitive cartel action and many were subject to massive legal repression by state police, federal military power, and federal courts. Many Western nations legalized striking under certain conditions in the late 19th and early 20th centuries.