The 517th Air Defense Artillery Regiment is a military unit within the United States Army, specialized in air defense operations. Established in 1942 during World War II, it has since been an integral part of various conflicts and peacekeeping missions. The regiment's primary role involves employing ground-based air defense systems to protect friendly forces from enemy aerial threats. It is currently under the command of the Army National Guard. Throughout its history, the 517th Air Defense Artillery Regiment has demonstrated commitment and professionalism in defending the skies for the United States.