Insurrection Act

The Insurrection Act of 1807 is a United States federal law that empowers the President to deploy the military and federalized National Guard troops within the United States in certain circumstances, such as to suppress civil disorder, insurrection, or rebellion. The Act provides a statutory exception to the Posse Comitatus Act of 1878, allowing the President to use military personnel for law enforcement purposes within the United States. The Act requires the President to publish a proclamation ordering the insurgents to disperse before invoking its powers, and it has been modified twice since its passage, including in 1861 and 1871 to protect Black Americans from attacks by the Ku Klux Klan and to enforce the Equal Protection Clause of the Fourteenth Amendment. The Act has been invoked many times throughout American history, including during labor conflicts, to enforce federally mandated desegregation, and in response to natural disasters.learn more on wikipedia