the Posse Comitatus Act

The Posse Comitatus Act, enacted in 1878, limits the authority of the U.S. military to enforce domestic laws within the United States. It generally prohibits the military from acting as a police force or engaging in law enforcement activities like arresting citizens, unless specifically authorized by Congress or the Constitution. The law aims to maintain civilian control over the military and prevent military interference in civilian law enforcement. Exceptions exist for certain situations, such as customs enforcement or national emergencies, but overall, it ensures that domestic law enforcement remains primarily a civilian responsibility.