Operation Linebacker

Operation Linebacker
Operation Linebacker
Part of Vietnam War
Date 9 May – 23 October 1972
Location Democratic Republic of Vietnam
Result Communist tactical victory, heavy civilian losses .
Flag of the United States.svg United States
Flag of South Vietnam.svg Republic of Vietnam
Flag of Vietnam.svg Democratic Republic of Vietnam
Commanders and leaders
John W. Vogt, Jr. Nguyen Van Tien
Casualties and losses
PAVN claim: 674 US aircraft shot down, 125 damaged,[1] 80 US warships sunk or damaged[2]

US claim: 134 aircraft (104 in air combat), casualties unknown
ARVN losses: ten aircraft, casualties unknown

68 aircraft (54 in air combat), casualties unknown
(For the December 1972 military operation, see Operation Linebacker II).

Operation Linebacker was the title of a U.S. Seventh Air Force and U.S. Navy Task Force 77 aerial interdiction campaign conducted against the Democratic Republic of Vietnam (North Vietnam) from 9 May to 23 October 1972, during the Vietnam War.

Its purpose was to halt or slow the transportation of supplies and materials for the Nguyen Hue Offensive (known in the West as the Easter Offensive), an invasion of the Republic of Vietnam (South Vietnam), by forces of the People's Army of Vietnam (PAVN), that had been launched on 30 March. Linebacker was the first continuous bombing effort conducted against North Vietnam since the bombing halt instituted by President Lyndon B. Johnson in November 1968.


Nguyen Hue Offensive

At noon on 30 March 1972, 30,000 North Vietnamese troops, supported by regiments of tanks and artillery, rolled southward across the Demilitarized Zone (DMZ) that separated the two Vietnams.[3] This three-division force caught the Army of the Republic of Vietnam (ARVN) and their American allies unprepared.[4] The PAVN force struck the defensive positions of the Third ARVN Division and threw it into disarray. South Vietnamese forces then fell back, and a race began between both antagonists to the bridges at Dong Ha and Cam Low.

By 4 April, ARVN officers had patched together a defensive line that held the PAVN at bay, but it was only a temporary respite.[5] Although the conventional attack by the North Vietnamese, which included the extensive use of armor and heavy artillery, riveted the attention of the allies on the northern provinces, it was only the first of three such operations that were launched that spring. On 5 April, a PAVN force of 20,000 crossed the border from their sanctuaries in Cambodia in another three-division, combined arms force to attack Binh Long Province, north of Saigon.[6] They quickly seized the town of Loc Ninh and then surrounded the town of An Loc, cutting the road to the capital. On 12 April, PAVN struck again, this time moving in from eastern Laos and seizing a series of border outposts around Dak To in Kontum Province in the Central Highlands.[7] The North Vietnamese then proceeded east toward the provincial seat of Kontum. Hanoi had initiated the offensive to coincide with the winter monsoon, when continuous rain and low cloud cover made air support difficult.[8]

The Nguyen Hue offensive

The initial U.S. response to the offensive was lackadaisical and confused.[9] The Pentagon was not unduly alarmed and the U.S. Ambassador and the commander of U.S. forces, General Creighton W. Abrams, were out of the country. President Richard M. Nixon's first response was to consider a three-day attack by B-52 Stratofortress bombers on Hanoi and the port city of Haiphong. His National Security Advisor, Dr. Henry Kissinger, convinced the president to reconsider, since he did not want to jeopardize the formalization of the Strategic Arms Limitation Treaty (SALT I) with the Soviets, that was due to be formalized in May.[10] Another stumbling block to the plan was General Abrams' desire to utilize the available bombers (with their all-weather capability) to support the ARVN defense.[11]

Both Nixon and Kissinger considered a plan offered by the Joint Chiefs of Staff to be both unimaginative and lacking in aggressiveness.[12] On 4 April, he authorized the bombing of North Vietnam (which had been limited to reprisal raids just above the DMZ) up to the 18th parallel.[13] In order to prevent a total ARVN collapse and to protect American prestige during the upcoming summit meeting with Soviet Premier Leonid Brezhnev, Nixon decided to risk a massive escalation of force.[14]

Due to the continuous withdrawal of American forces and the ongoing policy of Vietnamization, at the time of the invasion fewer than 10,000 U.S. troops remained in South Vietnam, and most of them were scheduled to leave within the next six months.[15] The number of combat aircraft stationed in Southeast Asia was less than half that of its peak strength in 1968–1969. At the beginning of 1972, the U.S. Air Force had only three squadrons of F-4s and a single squadron of A-37s, a total of 76 aircraft, stationed in South Vietnam.[16] Another 114 fighter-bombers were located at bases in Thailand. 83 B-52 bombers were stationed at U-Tapao RTAFB, Thailand and at Andersen Air Force Base, Guam.[17] The U.S. Navy's Task Force 77 (stationed in the Gulf of Tonkin), had four aircraft carriers assigned to it, but only two were available at any one time to conduct operations. Their air wings totaled approximately 140 aircraft.[18]

Build-up and air attacks

American and South Vietnamese Air Force (VNAF) aircraft had been supporting the defense (weather permitting) since the inception of the offensive. These strikes were conducted in support of ARVN forces, and included those of the air wings of the carriers Coral Sea and Hancock. The continuing bad weather, however, limited the ability of the U.S. aircraft to assist in stemming the North Vietnamese onslaught. By 6 April, at naval and air bases around the globe, American forces were put on alert and ships and aircraft squadrons began moving toward Southeast Asia.

The U.S. immediately began a rapid build-up of airpower. The Air Force deployed 176 F-4 Phantoms and 12 F-105s from bases in the Republic of Korea and the U.S. to Thailand between 1 April and 11 May in Operation Constant Guard.[19] Between 4 April and 23 May, during Operation Bullet Shot[20], Strategic Air Command (SAC) dispatched 124 B-52s from the U.S. to Guam bringing the total B-52 strength available for operations to 209.[21] The Navy cut short its in-port period for the carriers Kitty Hawk and Constellation and ordered Midway and Saratoga to augment the fleet so that four or more carrier air wings could conduct missions simultaneously. 7th Fleet assets in local waters was thereby increased from 84 to 138 ships.[12]

U.S. Air Force tactical strikes against North Vietnam north of the 20th parallel were authorized on 5 April under the nickname Freedom Train.[13] The first large-scale B-52 raid directed against the north was conducted on 10 April when 12 B-52s, supported by 53 attack aircraft struck petroleum storage facilities around Vinh.[22] By 12 April, President Nixon had informed Kissinger that he had decided on a more comprehensive bombing campaign which would include strikes against both Hanoi and Haiphong.[12]

North Vietnamese anti-aircraft defense weapons

The following day 18 B-52s struck Thanh Hoa's Bai Thuong Airfield. Three more days followed before another strike, this time by another 18 bombers in a pre-dawn attack against an oil tank farm outside Haiphong. They were followed by more than 100 tactical aircraft attacking targets around Hanoi and Haiphong during daylight.[13] Between the 6th and the 15th, U.S. aircraft also struck and destroyed the Paul Doumer and Thanh Hóa bridges and the Yen Vien railway marshalling yard. This marked the introduction of laser-guided bombs against strategic targets in North Vietnam. Both bridges had previously been attacked unsuccessfully with conventional bombs and even missiles. The B-52s were then withdrawn from operations in the north, and when they returned in June, their missions would be limited to the southern panhandle.[23]

By mid-month, nearly all of North Vietnam had been cleared for bombing raids for the first time in over three years. Air Force and Navy commanders and pilots were relieved that Nixon (unlike President Johnson) left the operational planning to local commanders and loosened the targeting restrictions that had hampered Operation Rolling Thunder.[24] Between 1 May and 30 June B-52s, fighter-bombers, and gunships had flown 18,000 sorties against formidable AAA defenses with the loss of 29 aircraft.[25]

The U.S. also now began what North Vietnamese historians have described as "using devious political and diplomatic schemes...to cut back the amount of aid being supplied to us by socialist nations."[26] On 20 April Kissinger met secretly with Brezhnev in Moscow. Unwilling to jeopardize increasingly normalized relations with the West and wary of Washington's growing relationship with Beijing, Brezhnev agreed to apply pressure to Hanoi to end the offensive and negotiate seriously.[27]

Brezhnev then arranged for another secret meeting between Kissinger and Hanoi's lead negotiator Le Duc Tho, to be held on 2 May in Paris. On the assigned day, the two men met for a session that Kissinger later described as "brutal and insulting."[28] The North Vietnamese, sensing victory, were in no mood to make concessions. As a result of this meeting and the fall of Quang Tri City, Nixon was prepared to up the ante, stating that "the bastards have never been bombed like they're going to be bombed this time."[29]

Operation Pocket Money

On 27 April, ARVN defenses in Quang Tri Province began to collapse. Due to conflicting orders from their high command, South Vietnamese units joined an exodus of refugees heading southward, abandoning Quang Tri City.[30] PAVN forces entered the city on the same day as the meeting between Kissinger and Le Duc Tho. The PAVN offensive had become a massive conventional military operation that was being conducted on three fronts simultaneously, involving the equivalent of 15 divisions and 600 tanks.[31] As the North Vietnamese continued to gain ground in three of South Vietnam's four military regions, the U.S. Joint Chiefs of Staff updated their contingency plans (drawn up before the bombing halt of 1968) for the resumption of bombing in the north and recommended it to the president, who approved it on 8 May.[32] Shortly after his inauguration, Nixon had ordered the preparation of a contingency plan, one that would hopefully bring the Vietnam War to an end.[33] Operation Duck Hook was to include an invasion of the north itself and included a proposal to mine its major harbors.[34] The plan had been shelved at the time as too extreme, but it was not forgotten. The U.S. Navy had also been updating its own contingency plans for just such a mining operation since 1965. On 5 May, the president ordered the Joint Chiefs to prepare to execute the aerial mining portion of the Duck Hook plan within three days under the operational title Pocket Money.[33]

At precisely 09:00 (local time) on 8 May six Navy A-7 Corsair IIs and three A-6 Intruders from Coral Sea entered Haiphong harbor and dropped 36 1,000-pound Mark-52 and Mark-55 mines into the water. They were protected from attack by North Vietnamese MiG fighters by the guided-missile cruisers Chicago and Long Beach and by flights of F-4 Phantoms. The reason for the precise timing of the strike became apparent when President Nixon simultaneously delivered a televised speech explaining the escalation to the American people: "the only way to stop the killing is to take the weapons of war out of the hands of the international outlaws of North Vietnam."[35] The mines were activated five days after their delivery in order to allow any vessels then in port to escape without damage.[32] Over the next three days other carrier aircraft laid 11,000 more mines into North Vietnamese secondary harbors, effectively blockading all maritime commerce.[36]

Both before and during Pocket Money, Nixon and Kissinger had worried about the Soviet and Chinese reaction to the escalation. Hours before the president's speech announcing the mining, Kissinger had delivered a letter to Soviet ambassador Anatoly Dobrynin which outlined the U.S. plan, but which also made clear Nixon's willingness to proceed with the summit.[37] The next day, Nixon shook the hand of Soviet Foreign Trade Minister Nikolai Patolichev at the White House. Although both Moscow and Beijing publicly denounced the American operation, they were not willing to jeopardize their thawing relationship with the U.S. and Hanoi's requests for support and aid from its socialist allies met with only cool responses.[35] Nixon and Kissinger's diplomacy had triumphed and the U.S. was free to react as it pleased.

Going North

VA-195 A-7E bombing the Hai Duong bridge, 10 May 1972.

Operation Linebacker, the designation for the new interdiction campaign, would have four objectives: to isolate North Vietnam from its outside sources of supply by destroying railroad bridges and rolling stock in and around Hanoi and northeastward toward the Chinese frontier; the targeting of primary storage areas and marshalling yards; to destroy storage and transshipment points; and finally, to eliminate (or at least damage) the north's air defense system.[38] With nearly 85 percent of North Vietnam's imports (which arrived by sea) blocked by Pocket Money, the administration and the Pentagon believed that cutting its final lines of communication with its socialist allies. The People's Republic of China alone shipped an average of 22,000 tons of supplies a month over two rail lines and eight major roads that linked it with North Vietnam.[33]

On 10 May Operation Linebacker and Operation Custom Tailor began with large-scale bombing operations against North Vietnam by tactical fighter aircraft of the Seventh Air Force and Task Force 77. Their targets included the railroad switching yards at Yen Vien and the Paul Doumer Bridge, on the northern outskirts of Hanoi.[39] A total of 414 sorties were flown on the first day of the operation, 120 by the Air Force and 294 by the Navy, and they encountered the heaviest single day of air-to-air combat during the Vietnam War, with 11 North Vietnamese MiGs (four MiG-21s and seven MiG-17s) and two U.S. Air Force F-4s shot down.[40] Anti-aircraft artillery and over 100 surface-to-air missile firings also brought down two U.S. Navy aircraft.[40]

By the end of the month, American aircraft had destroyed 13 bridges along the rail lines running from Hanoi to the Chinese border. Another four were destroyed between the capital and Haiphong, including the notorious "Dragon's Jaw" that spanned the Song Ma River near Thanh Hoa. Several more bridges were brought down along the rail line leading to the south toward the DMZ. Targets were then switched to petroleum and oil storage and transportation networks and North Vietnamese airfields.[41] There was an immediate impact on the battlefield in South Vietnam. Shelling by PAVN artillery dropped off by one-half between 9 May and 1 June. This slowdown was not due to an immediate shortage of artillery shells, but rather to a desire to conserve ammunition. U.S. intelligence analysts believed that PAVN had enough stockpiled supplies to sustain their campaigns throughout the autumn.[42]

A 388th TFW SAM hunter-killer team refueling on its way to North Vietnam, October 1972.

The intensity of the bombing campaign was reflected by the sharp increase in the number of strike and support sorties flown in Southeast Asia as a whole: from 4,237 for all services, including the VNAF, during the month preceding the invasion, to 27,745 flown in support of ARVN forces from the beginning of April to the end of June (20,506 of them flown by the Air Force).[43] B-52s provided an additional 1,000 sorties during the same period.[43] The north was feeling the pressure, admitting in the official PAVN history that "between May and June only 30 percent of supplies called for in our plan actually reached the front-line units."[44] The Linebacker missions included the first widespread use of precision-guided munitions, including electro-optical and laser-guided bombs. In addition to interdicting the road and rail system of North Vietnam, Linebacker also systematically attacked its air defense system. The North Vietnamese Air Force, with approximately 200 interceptors, strongly contested these attacks throughout the campaign. Navy pilots, employing a mutually supporting "loose deuce" tactical formation and many with TOPGUN training, enjoyed a kill ratio of 6:1 in favor of USA in May and June, such that after that the North Vietnamese rarely engaged them thereafter.[45] The Air Force, opposed by MiG-21s, MiG-17s, and J-6s (the Chinese version of the MiG-19), experienced a virtual 1:1 shoot-down ratio through the first two months of the campaign, as seven of its eventual 24 Linebacker air-to-air losses occurred without any corresponding North Vietnamese loss in a twelve-day period between 24 June and 5 July.[46]

Air Force pilots were hampered by use of the outdated "fluid four" tactical formations (a four-plane, two element formation in which only the leader did the shooting and in which the outside wingmen were vulnerable) dictated by service doctrine. Also contributing to the parity was a lack of air combat training against dissimilar aircraft, a deficient early warning system, and ECM pod formations that mandated strict adherence to formation flying.[47] During August, however, the introduction of real-time early warning systems, increased aircrew combat experience, and degraded North Vietnamese ground control interception capabilities reversed the trend to a more favorable 4:1 kill ratio.[48]

Linebacker saw several other "firsts". On the opening day of the operation, Navy Lieutenant Randall H. Cunningham and his radar intercept officer, Lieutenant (j.g.) William P. Driscoll became the first U.S. air aces of the Vietnam War when they shot down their fifth MiG.[49] On 28 August, the Air Force gained its first ace when Captain Richard S. Ritchie downed his fifth enemy aircraft. Twelve days later, Captain Charles B. DeBellevue (who had been Ritchie's backseater during four of his five victories) downed two more MiGs, bringing his total to six. On 13 October another weapons officer, Captain Jeffrey S. Feinstein, was credited with his fifth MiG, making him the final Air Force ace.[49]

Paris Peace Talks and conclusion

The stalled offensive in the south and the devastation in North Vietnam had helped to convince Hanoi to return to the bargaining table by early August.[49] The meetings produced new concessions from Hanoi which promised to end the deadlock that had plagued negotiations since their inception in 1968. Gone were Hanoi's demands for the ouster of South Vietnamese President Nguyễn Văn Thiệu and his replacement by a coalition government in which the National Liberation Front would participate.[50] The diplomatic impasse was broken and Nixon ordered a halt to all bombing above the 20th parallel on 23 October. This once again placed Hanoi and Haiphong off-limits, and halted Linebacker operations. Air Force historian Earl Tilford has written that Linebacker was "a watershed in aerial warfare...it was the first modern aerial campaign in which precision guided munitions changed the way in which air power was used."[51] It succeeded, where Rolling Thunder had failed, he claimed, for three reasons: President Nixon was decisive in his actions and gave the military greater latitude in targeting; American airpower was forcefully and appropriately used; and the immense difference in the technology utilized made Linebacker the first bombing campaign in a "new era" of aerial warfare.[52]

During and immediately following the PAVN offensive, U.S. Air Force, Navy, and Marine Corps aviators had flown 18,000 sorties in the four northern provinces of South Vietnam and dropped 40,000 tons of ordnance in the defense of An Loc. Between March and May, B-52 sortie rates had climbed from 700 to 2,200 per month and the big bombers had dropped 57,000 tons of bombs in Quang Tri Province alone.[53] During Freedom Train and Linebacker proper, B-52s had dropped 150,237 tons of bombs on the north while Air Force and Navy tactical aircraft had flown 1,216 sorties and dropped another 5,000 tons of ordnance.[54]

From the beginning of Freedom Train in April to the end of June 1972 the United States lost 52 aircraft over North Vietnam: 17 to missiles; 11 to anti-aircraft weapons; three to small arms fire; 14 to MiGs; and seven to unknown causes.[55] During the same time period, the Republic of Vietnam Air Force lost ten aircraft.[56] 63 North Vietnamese aircraft were destroyed during the same time period.[57] North Vietnam claimed that it had shot down 651 aircraft and sunk or set on fire 80 U.S. warships during the operation.[2]

Linebacker had played a crucial role in blunting the northern offensive by drying up its vital sources of supply. PAVN had evolved into a conventional military force, and such a force depended upon a complex logistical system, which made it vulnerable to aerial attack.[58] By September, imports into North Vietnam were estimated at 35 to 50 percent below what they had been in May, bolstering claims that the campaign had been successful in its interdiction effort.[59] Air Force General Robert N. Ginsburgh, of the Office of the Secretary of the Air Force, summed up the attitudes of U.S. commanders by remarking that Linebacker had "a greater impact in its first four months of operation than Rolling Thunder had in three and one-half years."[60] Although Henry Kissinger may have announced that peace was at hand, it was not going to come easily. American bombers would once again return to the skies of North Vietnam in 1972 during Operation Linebacker II before the American commitment to the Vietnam War came to an end.

North Vietnamese aircraft losses

(Air-to-air losses only)[61][62]

Dates Service MiG-21 MiG-19 MiG-17 Total
5 April – 9 May USAF 4 1 5
USN 2 2 4
10 May – 23 October USAF 30 7 37
USN 3 2 11 16
USMC 1 1
VPAF Total 40 10 13 63

U.S. aircraft losses during Linebacker

Between 10 May and 23 October 1972, the United States lost a total of 134 aircraft either over the north or as a direct result of Linebacker missions. 104 were lost in combat and 30 were destroyed in operational accidents. Losses by service were:[63]

USAF: – 70 total

USN: – 54 total

USMC: – 10 total

  • 10 combat losses (1 MiG, 1 SAM, 8 AAA)
    • 4 F-4J Phantom II
    • 2 A-4E Skyhawk
    • 4 A-6A Intruder

U.S. air order of battle

  • Task Force 77
USS Constellation, Carrier Air Wing 9 (F-4, A-6, A-7)
USS Coral Sea, Carrier Air Wing 15 (F-4, A-6, A-7)
USS Hancock, Carrier Air Wing 21 (F-8, A-4)
USS Kitty Hawk, Carrier Air Wing 11 (F-4, A-6, A-7)
USS Midway, Carrier Air Wing 5 (F-4, A-6, A-7)
USS Saratoga, Carrier Air Wing 3 (F-4, A-6, A-7)
USS America, Carrier Air Wing 8 (F-4, A-6, A-7)
  • Seventh Air Force
8th Tactical Fighter Wing, Ubon RTAFB, Thailand (F-4)
+ two Constant Guard squadrons from 4th TFW, Seymour-Johnson AFB. North Carolina
49th Tactical Fighter Wing, Takhli RTAFB, Thailand (F-4)
56th Special Operations Wing, Nakhon Phanom RTAFB, Thailand (A-1, HH-53)
366th Tactical Fighter Wing, Danang AB, RVN (F-4)
+ one Constant Guard squadron from 3rd TFW, Osan AB, Korea
388th Tactical Fighter Wing, Korat RTAFB, Thailand (F-4, F-105G)
+ one Constant Guard squadron from 23d TFW, McConnell AFB, Kansas
432d Tactical Reconnaissance Wing, Udon RTAFB, Thailand (F-4), RF-4)
+three Constant Guard squadrons
--one squadron from 405th TFW, Clark AB, Philippines
--one squadron from 31st TFW, Homestead AFB, Florida
--one squadron from 33d TFW, Eglin AFB, Florida
43d Strategic Wing, Andersen AFB, Guam (B-52)
72d Strategic Wing (Provisional), Anderson AFB, Guam (B-52)
307th Strategic Wing, U Tapao RTAFB, Thailand (B-52)

See also

USS Kitty Hawk riot


  1. ^ Lịch sử kháng chiến chống Mỹ cứu nước. Tập VIII
  2. ^ a b Victory in Vietnam, p. 301.
  3. ^ Maj. A.J.C. Lavalle, ed. Airpower and the 1972 Spring Offensive. Maxwell AFB AL: Air University Press, 1976, p. 4.
  4. ^ David Fulghum & Terrance Maitland, et al., South Vietnam on Trial. Boston: Boston Publishing Company, 1984, p. 138.
  5. ^ Fulghum and Maitland, p. 141.
  6. ^ Lavalle, p. 6.
  7. ^ Fulghum and Maitland, pp. 154–158.
  8. ^ Earl H. Tilford, Setup: What the Air Force Did in Vietnam and Why. Maxwell AFB AL: Air University Press, 1991, p. 225.
  9. ^ Fulghum and Maitland, pp. 141–142.
  10. ^ Tilford, p. 234.
  11. ^ Fulghum and Maitland, p. 170.
  12. ^ a b c Fulghum and Maitland, p. 142.
  13. ^ a b c Tilford, p. 228.
  14. ^ Tilford, p. 232
  15. ^ Michael Casey, Clark Dougan, Samuel Lipsman, Jack Sweetman, Stephen Weiss, et al., Flags into Battle. Boston: Boston Publishing Company, 1987, p. 182.
  16. ^ Lavalle, p. 12.
  17. ^ Tilford, pp. 223–224.
  18. ^ John Morocco, Rain of Fire. Boston: Boston Publishing Company, 1985, p. 170.
  19. ^ Lavalle, pp. 19, 23–25. Also see Morocco, pp. 108–109.
  20. ^ "Operation Bullet Shot". GlobalSecurity.org. http://www.globalsecurity.org/military/ops/bullet_shot.htm. Retrieved 23 July 2011. "Operation "Bullet Shot" conducted during 1972 and resulted in the North Vietnamese finally getting serious about negotiating." 
  21. ^ Tilford, p. 224.
  22. ^ Wayne To Hanoi and Back. Washington DC: Smithsonian Institution Press, 2000, p. 225.
  23. ^ Thompson, p. 229.
  24. ^ Stanley Karnow, Vietnam. New York: Viking, 1983, p. 643.
  25. ^ Casey, Dougan, Lipsman, p. 39.
  26. ^ Military Institute of Vietnam: Victory in Vietnam. Lawrence KS: University of Kansas Press, 2992, p. 299.
  27. ^ On 21 February 1972 Nixon had landed in Beijing for his dramatic diplomatic breakthrough with the People's Republic. The Chinese, who had previously hoped that a long war in Southeast Asia would bleed both the Americans and their Vietnamese neighbors, now feared that a decline in American power would deprive them of a counterweight to the Soviet Union. Karnow, p. 638.
  28. ^ Fulghum and Maitland, p. 179.
  29. ^ Fulghum and Maitland, p. 168.
  30. ^ Dale Andrade, Trial by Fire. New York: Hippocrene Books, 1995 p. 52.
  31. ^ Dave Richard Plamer, Summons of the Trumpet, New York: Ballentine, 1978, p. 317.
  32. ^ a b Tilford, p. 233.
  33. ^ a b c Morocco, p. 130.
  34. ^ Fulghum and Maitland, p. 144.
  35. ^ a b Morocco, p. 131.
  36. ^ Andrade, p. 518.
  37. ^ Fulghum and Maitland, pp. 170–171.
  38. ^ William P. Head, War Above the Clouds, Maxwell AFB AL: Air University Press, 2002, p. 65.
  39. ^ Casey, Dougan and Lipsman, p. 39.
  40. ^ a b Thompson, p. 236.
  41. ^ Tilford, p. 235.
  42. ^ Andrade, p. 519.
  43. ^ a b Head, p. 66.
  44. ^ Victory in Vietnam, p. 293.
  45. ^ Morocco, p. 144.
  46. ^ Marshall L. Michel, Clashes: Air Combat Over North Vietnam 1965–1972. Annapolis MD: Naval Institute Press, 1997, p. 244.
  47. ^ Michel, p. 288
  48. ^ Michel. p. 284
  49. ^ a b c Morocco, p. 145.
  50. ^ Lipsman and Weiss, p. 9. See also Karnow, p. 647.
  51. ^ Tilford, p. 238.
  52. ^ Tilford, pp. 238–240.
  53. ^ Lavalle, p. 103.
  54. ^ Head, p. 71.
  55. ^ Head, p. 66. One of those aircraft was an EB-66 electronic jamming aircraft with the call sign "Bat-21". The Prowler was shot down over northern South Vietnam on 2 April with only one survivor, Lieutenant Colonel Iceal Hambleton. The successful rescue of Hambleton and Lieutenant Mark Clark were the subject of a best-selling book and a movie. See Lavalle, pp. 35–43.
  56. ^ Tilford, pp. 231, 251. Linebacker. See also Lavalle, p. 107.
  57. ^ Tilford, p. 245.
  58. ^ Palmer, p. 322.
  59. ^ Tilford, p. 237.
  60. ^ Morocco, p. 136.
  61. ^ "United States Air Force in Southeast Asia: Aces and Aerial Victories – 1965–1973" (PDF). Air University. https://www.airforcehistory.hq.af.mil/Publications/fulltext/aces_aerial_victories.pdf. Retrieved 15 February 2007. , on-line book, pp. 95–102.
  62. ^ Drendel, Lou. (1984). ...And Kill MiGs. Squadron/Signal Publications. ISBN 0897470567. 
  63. ^ Ed Rasimus (2006). "Appendix I – Linebacker Losses". Palace Cobra: A Fighter Pilot in the Vietnam Air War. St. Martin's Press. ISBN 0312353561. , pp. 233–248. Losses are enumerated by date, aircraft type and serial number, and crew members.
  64. ^ Michel, p. 317 note 2. An "induced loss" occurred when a MiG was credited with indirectly causing a U.S. aircraft loss, including fuel exhaustion, fratricide, and loss of control while maneuvering.

77. ^Hobson, Chris. "Vietnam Air Losses." 2001. ISBN 1-85780-1156


Published Government Documents

  • Head, William P. War from Above the Clouds: B-52 Operations During the Second Indochina War and the Effects of the Air War on Theory and Doctrine. Maxwell AFB AL: Air University press, 2002. Online edition
  • Lavalle, Maj. A.J.C., ed. Airpower and the 1972 Spring Offensive. Maxwell AFB AL: Air University Press, 1976.Online edition
  • Military History Institute of Vietnam, Victory in Vietnam: The Official History of the People's Army of Vietnam, 1954–1975. Trans. by Merle Pribbenow. Lawrence KS: University of Kansas Press, 2002.
  • Nalty, Bernard C. Air War Over South Vietnam: 1969–1975. Washington DC: Center of Air Force History, 1995.
  • Schlight, John. A War too Long: The United States Air Force in Southeast Asia 1961–1975. Air Force History and Museums Programs, 1996. Online edition
  • Thompson, Wayne, To Hanoi and Back: The U.S. Air Force and North Vietnam, 1966–1973. Washington: Smithsonian Institution Press, 2000.
  • Tilford, Earl H. Setup: What the Air Force Did in Vietnam and Why. Maxwell Air Force Base AL: Air University Press, 1991.

Secondary Sources

  • Andrade, Dale, Trial by Fire: the 1972 Easter Offensive, America's Last Vietnam Battle. New York: Hippocrene Books, 1995.
  • Casey, Michael, Clark Dougan, Samuel Lipsman, Jack Sweetman, Stephen Weiss, et al., Flags into Battle. Boston: Boston Publishing Company, 1987.
  • Drendel, Lou, Air War over Southeast Asia: Vol. 3, 1971–1975. Carrollton TX: Squadron/Signal Publications, 1984.
  • Fulghum, David and Terrence Maitland, et al., South Vietnam on Trail: Mid-1970–1972. Boston: Boston Publishing Company, 1984.
  • Karnow, Stanley, Vietnam: A History. New York: Viking Books, 1983.
  • Michel, Marshall L. Clashes: Air Combat over North Vietnam 1965–1972. Annapolis MD: Naval Institute Press, 1997. ISBN 1557505853
  • Lipsman, Samuel and Stephen Weiss, et al., The False Peace: 1972–74. Boston: Boston Publishing Company, 1985.
  • Littauer, Raphael and Norman Uphoff, The Air War in Indochina. Boston: Beacon Press, 1972.
  • Morocco, John, Rain of Fire: Air War, 1969–1973. Boston: Boston Publishing Company, 1985.
  • Palmer, Dave Richard (1978). Summons of the Trumpet: The History of the Vietnam War from a Military Man's Viewpoint. New York: Ballentine. 

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