|Operation Arc Light|
|Part of Second Indochina War (Vietnam • Laos • Cambodia), Combat Skyspot|
|Type||Close air support operations|
|Commanded by||United States Air Force; National Security Agency; Richard Nixon|
|Target||Vietnam, Laos, Cambodia|
|Executed by||US Air Force, Strategic Air Command, Combat Skyspot; National Security Agency|
|Casualties||34 B-52F Stratofortresses lost|
During Operation Arc Light (sometimes Arclight) from 1965 to 1973, the United States deployed B-52F Stratofortresses from bases in the US to Guam to provide battlefield air interdiction, including strikes at enemy bases, supply routes and behind the lines troop concentrations, as well as occasionally providing close air support directly to ground combat operations in Vietnam. The conventional bombing campaign was supported by ground-control-radar detachments of the 1st Combat Evaluation Group (1CEVG) in Operation Combat Skyspot. Arc Light operations usually targeted enemy base camps, troops concentrations, and supply lines.
Previously dedicated to carrying nuclear weapons, in 1964 the U.S. Air Force began to train strategic bomber crews to deliver conventional munitions flying the B-52F.
The B-52Fs were deployed to Andersen Air Force Base in Guam and U-Tapao Royal Thai Navy Airfield in Thailand. To add conventional bomb capacity, Project Big Belly modified all B-52Ds to enable them to carry 30 tons of conventional bombs.
By the middle of April 1966, all B-52Fs were redeployed back to the US and were replaced by Big Belly-modified B-52Ds. Later in the Vietnam War, the B-52G was also deployed with the B-52D.
B-52Ds were also used from Kadena AFB, Okinawa, Japan from the 376th Strategic Wing. The 96th Strategic Air Wing from Dyess AFB deployed for Arc Light in June, 1970 for 180 days. Upon completion of the Arc Light deployment the 376th SW B-52Ds either returned to the continental United States or were sent to U-Tapao. The 376th SW then ceased bomber operations, but continued flying Young Tiger tanker missions.
Congressional investigations of secret CIA activities in Laos revealed that B-52s were used to systematically bomb targets within Laos and Cambodia.
The bombers were first used in Southeast Asia on June 18, 1965. Flying from Andersen Air Force Base, Guam, 27 aircraft dropped 750 pounds (340 kg) and 1,000 pounds (450 kg) bombs on a Viet Cong stronghold. During this mission two B-52Fs were lost in a mid-air collision on June 19, 1965, while circling over the South Pacific Ocean, approximately 250 miles offshore at the point of the Demilitarized Zone (DMZ), unable to conduct mid-air refueling in awaiting arrival of KC-135A tankers for pre-strike air refueling.
Missions were commonly flown in three-plane formations known as "cells". Releasing their bombs from the stratosphere, the B-52s could neither be seen or heard from the ground. B-52s were instrumental in destroying enemy concentrations besieging Khe Sanh in 1968, and in 1972 at An Loc and Kontum.
Arc Light was re-activated at Andersen on February 8, 1972 when President Richard Nixon resumed bombing of North Vietnam in an effort to move peace talks along. Over 15,000 men were sent to Andersen on temporary duty over the next 90 days. With limited barracks and other facilities, tents were set up for use by men working 80-hour weeks.
Arc Light missions continued until the cessation of hostilities by US forces on August 15, 1973. Between June 1965 and August 1973, 126,615 B-52D/F/G sorties were flown over Southeast Asia. During those operations, the US Air Force lost 31 B-52s, 18 from hostile fire over North Vietnam and 13 from operational causes.
The typical full bomb loads were:
Communication leaks undermined the effectiveness of the campaign. According to Stephen Budiansky, "Despite NSA's occasional success in tightening up particularly leaky communication practices, the problems continued throughout the war. Strategic Air Command...was by far the worst offender, giving the North Vietnamese as much as eight hours' warning and often revealing exact launch times and likely targets."
Nineteen technicians of the 1st Combat Evaluation Group were lost in ground combat. On September 21, 2010, President Barack Obama presented the Medal of Honor to the sons of Chief Master Sergeant Richard L. Etchberger for his actions in the battle of Lima Site 85. A memorial to all 1CEVG technicians is located directly behind the Arc Light memorial.
The memorial consists of an AN/MSQ-77 (AN/TSQ-81) parabolic antenna poised at 45 degrees elevation…situated directly behind the ARC LIGHT Memorial, a B52D Stratofortress…. The aircraft and the radar are facing the Vietnam theater, in solemn tribute to the men who flew the weapons and the men who directed them over targets of opportunity.