The USAADAPLAQUE refers to the Air Defense Artillery (ADA) branch of the United States Army. This branch is responsible for the employment of air defense weapons to protect military bases, ground forces, and civilian areas against aerial threats such as aircraft, missiles, and unmanned aerial vehicles. The ADA branch operates a variety of sophisticated equipment including surface-to-air missile systems, radar stations, and anti-aircraft artillery. The mission of the ADA is to ensure the defense of friendly forces and to deter or defeat enemy air attacks. The branch is part of the Army’s Air Defense Artillery Regiment.