Btry D 4th Msl BN 55th ARTY APO 23 ARADVOM

Battery D, 4th Missile Battalion, 55th Artillery (Btry D, 4th Msl BN, 55th ARTY) was a U.S. Army air defense unit active during the Cold War. Stationed under APO 23, within the Army Air Defense Command (ARADCOM), the battalion was responsible for operating Nike surface-to-air missile systems designed to protect critical areas from potential Soviet bomber attacks. The unit formed part of the continental U.S. air defense network, often deployed in strategic locations near major cities or military installations. Throughout its service, Battery D participated in numerous readiness exercises and maintained a high alert status until the drawdown of Nike missile sites in the late 1960s and early 1970s.