About this Unit
The 620th Tactical Control Squadron, stationed at Monkey Mountain near Da Nang, Vietnam, played a crucial role during the Vietnam War. Activated in the early 1960s, the unit was responsible for radar surveillance, air traffic control, and providing tactical air control for U.S. and allied air operations over northern South Vietnam and into Laos. Operating from the strategically significant Monkey Mountain facility, the squadron managed aircraft identification, vectoring intercepts, and coordinating air strikes. The 620th TAC Squadron’s efforts greatly enhanced the air defense network and contributed to the effectiveness of air operations throughout the region until its deactivation following American withdrawal.
Historical Facts
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Strategic Location: The 620th Tactical Control Squadron (TCS) was stationed at Monkey Mountain, near Da Nang, Vietnam. The site’s elevation and vantage point provided critical radar and communication coverage over northern South Vietnam and into Laos.
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Air Control Mission: The unit’s primary mission was to provide ground-controlled interception (GCI) and air surveillance, helping direct U.S. and allied aircraft during combat operations, especially during the Vietnam War’s intense air battles.
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Nickname “Monkey Mountain”: The mountain’s name comes from the native rhesus monkeys inhabiting the area, which were often seen by personnel and became an unofficial mascot for the station.
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Critical Role in Operation Rolling Thunder: The 620th TCS played a vital role in supporting Operation Rolling Thunder (1965–1968) by coordinating air strikes and monitoring enemy aircraft movements.
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Hazardous Conditions: The mountain’s steep, winding roads and dense jungle made resupply and personnel movement hazardous, and the site was frequently subject to Viet Cong and North Vietnamese Army attacks.
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Technological Hub: The unit operated advanced radar systems, such as the AN/FPS-20 and AN/FPS-6, to detect and track enemy aircraft, giving U.S. forces a technological edge.
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Joint Operations: Personnel from various U.S. branches, including the Air Force, Army, and Marine Corps, often worked together on Monkey Mountain, fostering inter-service cooperation.
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Notable Visitors: The site was visited by high-ranking officials, including generals and politicians, due to its importance in the air war over Vietnam.
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Living Conditions: Life on Monkey Mountain was challenging, with humidity, monsoons, wildlife, and isolation taking a toll on morale; however, camaraderie among the squadron members was strong.
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Enduring Legacy: After the war, the former 620th TCS site became the location for Vietnamese military installations, and remnants of the American radar and communications equipment can still be found in the area today.
