Posse Comitatus Act

The Posse Comitatus Act is a federal law that limits the use of federal military personnel to enforce domestic policies within the United States. The Act was signed by President Rutherford B. Hayes on June 18, 1878, and was passed as an amendment to an army appropriation bill following the end of Reconstruction. The law originally applied only to the United States Army, but was expanded to cover the United States Air Force in 1956, and the United States Navy, Marine Corps, and Space Force in 2021. The Act does not prevent the Army National Guard or the Air National Guard from acting in a law enforcement capacity within their home state or an adjacent state.learn more on wikipedia