Insurrection Act or Posse Comitatus Act?

18 U.S.C. § 1385 is the Posse Comitatus Act, which generally prohibits the willful use of the Army, Navy, Marine Corps, Air Force, or Space Force as a police force (posse comitatus) to execute laws, except when expressly authorized by the Constitution or an Act of Congress, with violators facing fines or imprisonment. This law reflects a long-standing tradition against using the military for domestic law enforcement to protect civil liberties, though exceptions exist, like for disaster relief or insurrection, under specific legal authorization.