666th Rar Sq (ADC)

• Origins: The 666th Radar Squadron (Air Defense Command) was first activated in 1950, during the early days of the Cold War, as part of the expanding U.S. air defense network. • Location: The squadron was stationed at Mill Valley Air Force Station, California, a strategic point for monitoring the western approaches to the United States. • Primary Mission: Its main responsibility was to operate radar systems to detect and track incoming enemy aircraft, particularly Soviet bombers. • SAGE Integration: The 666th Rar Sq was an early adopter of the SAGE (Semi-Automatic Ground Environment) system, which revolutionized air defense through computerized data processing and coordination. • Call Sign: The squadron's unique "666" numerical designation occasionally drew attention for its association with superstition, but the unit embraced its number with humor and pride. • 24/7 Operations: Squadron personnel worked around the clock in shifts, maintaining constant vigilance and readiness throughout the Cold War. • Cuban Missile Crisis: During tense periods such as the Cuban Missile Crisis, the squadron heightened its alert status and played a critical role in monitoring airspace for possible threats. • Technological Upgrades: The 666th continually upgraded its radar systems, including the installation of AN/FPS-24 and AN/FPS-26A radars, to keep pace with advancing aircraft technology. • Closure: With the shifting nature of military threats and advances in technology, the squadron was inactivated in 1974 as part of a nationwide drawdown of radar sites. • Legacy: The site of the former Mill Valley AFS is now part of the Golden Gate National Recreation Area, with remnants of the radar station still visible, commemorating the squadron’s role in U.S. air defense history.