| Ubon Royal Thai Air Force Base | |
|---|---|
| Part ofRoyal Thai Air Force (RTAF) | |
| Site information | |
| Type | Air Force Base |
| Owner | Royal Thai Air Force |
| Operator | Royal Thai Air Force |
| Controlled by | Royal Thai Air Force |
| Condition | Military Air Force Base |
| Location | |
![]() | |
| Coordinates | 15°15′04.60″N104°52′12.83″E / 15.2512778°N 104.8702306°E /15.2512778; 104.8702306 (Ubon RTAFB) |
| Site history | |
| Built | 1955 |
| In use | 1955–present |
| Battles/wars | Vietnam War |
Airfield information | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Summary | |||||||||||
| Elevation AMSL | 406 ft / 124 m | ||||||||||
| Coordinates | 15°15′04″N104°52′12″E / 15.25111°N 104.87000°E /15.25111; 104.87000 | ||||||||||
| Map | |||||||||||
| Runways | |||||||||||
| |||||||||||
Ubon Royal Thai Air Force Base is aRoyal Thai Air Force (RTAF) facility located near the city ofUbon Ratchathani, inUbon Ratchathani Province. It is approximately 488 km (303 miles) northeast ofBangkok. TheLaos border is about 60 kilometres (37 mi) directly east. The facility is also used as a civil airport.
Ubon RTAFB is the home of Wing 21 of the RTAF 2nd Air Division. The RTAF 211 SquadronEagles fly theNorthrop F-5E/F Tiger II fighter aircraft from Ubon.[1][2]
Ubon RTAFB was established in the 1950s. Political considerations with regards to communist forces engaging in a civil war inside Laos and fears of the civil war spreading into Thailand led the Thai government to allow the United States to covertly use five Thai bases beginning in 1961 for the air defense of Thailand and to fly reconnaissance flights over Laos.
Under Thailand's "gentleman's agreement" with the United States, RTAF base used by the USAF were commanded by Thai officers. Thai air police controlled access to the bases, along with USAF Security Police, who assisted them in base defense using sentry dogs, observation towers, and machine gun bunkers.
The USAF forces at Ubon were under the command of the United StatesPacific Air Forces (PACAF). Ubon was the location ofTACAN stationChannel 51 and was referenced by that identifier in voice communications during air missions.
The Army Post Office (APO) code for Ubon was "APO San Francisco 96304".

On 31 May 1962 theRoyal Australian Air Force (RAAF) sent a detachment of eightCAC-27 Sabre fighters to Ubon RTAFB. This detachment was designatedNo. 79 Squadron. The Australian facilities were known asRAAF Ubon, and were designed and constructed byNo. 5 Airfield Construction Squadron.[3]
The mission of No. 79 Squadron was to assist the Thai and Laotian governments in actions against communist insurgents during the early years of theVietnam War.[3]: 255 With the deployment of USAF fighters to Ubon, the unit also performed joint exercises and provided air defense for the USAF attack aircraft and bombers based at Ubon.[3]: 256 No. 79 Squadron did not, however, fly any operations over nearby Cambodia, South Vietnam, or Laos. The unit's strength during the entire period was about 150–200 men.Sir Edmund Hillary visited the base on 25 January 1967.
With its CAC Sabres now obsolete and restricted from operating outside Thai airspace, the squadron was disbanded at the end of July 1968.[3]: 257
From 1965 to 1974, the base was a front-line facility of the USAF during the Vietnam War.
In June 1965, the15th Tactical Fighter Wing deployed its45th Tactical Fighter Squadron the firstF-4C Phantom II unit in Southeast Asia to Ubon where they flew combat missions to North Vietnam.[4][5] On 10 July 1965, pilots of the 45th TFS were credited with the first air victory of the Vietnam War, downing two North VietnameseMiG-17s.[6] The 45th TFS was onTemporary duty assignment (TDY) from its permanent home atMacDill AFB, Florida. The 45th flew 1,000+ hours with 24 aircraft over North Vietnam in August 1965. It was replaced by the47th Tactical Fighter Squadron, also equipped with F-4Cs which arrived in July and returned to the US on 27 November 1965.[6]: 179 [7]

The8th Tactical Fighter WingThe Wolfpack arrived at Ubon on 8 December 1965 fromGeorge AFB,California as part of the US deployment of forces forOperation Rolling Thunder and became the host unit.[4]: 21
At Ubon, the 8th TFW's mission included bombardment, ground support, air defense, interdiction, and armed reconnaissance. The operational squadrons of the 8th TFW were:[4]: 20

On 23 April 1966, the 8th TFW scored its first MiG kills of the Vietnam War, shooting down two MiG-17 fighters. By the end of June 1966, after only six months in the theater, the wing had flown more than 10,000 combat sorties, achieving a 99% sortie rate, for which they received commendations.
In late December 1966 the 8th TFW commander ColonelRobin Olds developed a plan to lure North Vietnamese MiGs into combat and destroy them.Operation Bolo took place on 2 January 1967 and resulted in the loss of 7MiG-21s for no US losses.[13]
On 10 March 1967 8th TFW F-4s took part in the first attacks on theThái Nguyên ironworks, losing 2 F-4s to antiaircraft fire.[13]: 57–8
Beginning in late May 1967, new F-4D aircraft were delivered to Ubon, re-equipping the 555th TFS. The F-4D had improved radar-bombing capabilities and could deploy theAGM-62 Walleyetelevision-guided bomb, but replaced theAIM-9 Sidewinder with the infra-redAIM-4 Falcon which proved to be inferior.[13]: 91
On 11 August 1967, the 8th,355th and388th Tactical Fighter Wings conducted a raid on thePaul Doumer railroad and highway bridge in Hanoi. Thirty-six strike aircraft dropped 94 tons of bombs and destroyed one span of the bridge and part of the highway.[13]: 85
On 8 February 1968 8th TFW F-4s attackedPhúc Yên Air Base to attempt to destroyIl-28 bombers based there, losing 2 F-4s to antiaircraft fire in the low-level attack. Further attacks took place on 10 and 14 February with no losses and negligible results on the ground. 2 MiG-17s were shot down during the 14 February attack in the last USAF aerial victories of Operation Rolling Thunder.[13]: 127–8
In May 1968, the wing was the first to uselaser-guided bombs (LGBs) in combat and itsMig-Killers nickname was gradually replaced byBridge-busters.[13]: 233
After North Vietnam invaded South Vietnam in March 1972 during theEaster Offensive, the 8th TFW was augmented by additional F-4 units.

From March 1966C-130A ProjectBlind Bat flareships of the315th Air Division began operations over Laos from Ubon, increasing to 6 aircraft and 12 crews before their mission was superseded by newer systems in June 1970.[14]
In April 1966 4AC-47Spooky gunships were deployed to Ubon for interdiction operations over Laos.[15]
LORAN-equipped 8th TFW F-4Ds began theOperation Igloo White sensor-dropping mission over the Ho Chi Minh Trail in Laos from February 1968 taking over this role from the more vulnerableCH-3s andOP-2E Neptunes.[16]
On 27 February 1968 the first prototypeAC-130AGunship II began operations from Ubon, destroying 9 trucks and 2 services areas in Laos on its first sortie. It remained at Ubon until 14 June when it was transferred toTan Son Nhut Air Base.[15]: 90
With the arrival of the16th Special Operations Squadron (SOS) in October 1968 flying 4 AC-130Spectre gunships and with the end of Operation Rolling Thunder in November 1968, the 8th TFW's mission turned to interdiction of supplies down theHo Chi Minh trail.[17][15]: 105 By April 1969 the 16th SOS accounted for 44 percent of all trucks destroyed in Laos while flying only 3.7 percent of the sorties.[15]: 115
On 5 December 1969 the first AC-130Surprise Package aircraft equipped with improved night-vision equipment and aBofors 40 mm gun joined the 16th SOS at Ubon and began operation on 12 December.[15]: 169 In May 1970 5 AC-130As left Ubon for conversion toSurprise Package configuration, returning in October and commencing operations in November.[15]: 156–9
The 16th SOS also tested 2 ProjectBlack SpotAC/NC-123s beginning in December 1969. The aircraft had a very long nose fairing that housed a forward-looking radar and two internal aluminum weapons dispensers forCBU bomblets but no side-firing guns. This weapon system proved less effective than the AC-130, and operations with it were discontinued in June 1970.[18]
On 22 July 1974, the 16th SOS was transferred to Korat RTAFB.[17]

The13th Bombardment Squadron was deployed to Thailand and attached the 8th TFW fromMacDill AFB, Florida on 1 October 1970 with a modified version of the Canberra medium bomber designated as the B-57G.[19] Initially manufactured as B-57Bs in the early 1950s, the B-57G was fitted with a moving target radar as well as a low light level television system and a forward-looking infrared camera carried in a pod underneath the nose for use as night intruders over South Vietnam under a project known asTropic Moon III.
Operations with the B-57G continued until April 1972, when they were moved toClark Air Base in the Philippines to make room for the deployment of F-4E squadrons arriving from the United States.[20]
The 13th BS remained but was no longer manned or equipped and was kept in a non-operational status with the 8th TFW until finally being inactivated on 24 December 1972.[4]: 20
In response to the Easter Offensive, from April 1972 F-4E squadrons temporarily deployed from the US to Ubon during theConstant Guard buildup as follows:[20][13]: 223
The 334th TFS flew its first missions ofOperation Freedom Train on 14 April, followed by the 366th the following day.[20] On 13 May 1972 8th TFW F-4s equipped with laser-guided bombs succeeded in dropping a span of theThanh Hóa Bridge which had been unscathed despite hundreds of previous attacks.[13]: 235
On 10 June 1972 8th TFW F-4s successfully destroyed the 3 generators of the Lang Chi hydropower plant 70 miles (110 km) northwest of Hanoi, without damaging the dam itself.[13]: 251
The squadrons also participated inOperation Linebacker II in December 1972, flying primarily aschaff bombers and strike escorts. In a 21 December attack an 8th TFW laser-guided bomb aimed at the Hanoi thermal power plant lost guidance and instead destroyed aCommunist Party of Vietnam office building.[13]: 278
Ubon was attacked by sappers on 3 separate occasions during the Vietnam War period:
On 2 October 1972 36 mortar rounds were fired at the base causing no losses.[27]

1982 Comm. Sq (AFCS) providing Air Traffic Control services for the Ubon tower, terminal radar approach area and enroute services for Bangkok Center. 1982 Comm, Sq. also maintained the AB Telcom and VOR/TACAN (VORTAC channel 51) equipment. In 1973 until 1974 the 1982nd Radio Maintenance section maintained the electronic sensor intrusion detection system on the perimeters of both the base and the bomb dump. It was also the only USAF base that ran opposite direction, single runway, air traffic; landing runway 23, departing runway 05.
Detachment 17, 10th Weather Squadron (MAC)
In mid-1965 Detachment 3,38th Air Rescue Squadron equipped with 2HH-43Bs deployed to Ubon to provide base search and rescue.[28] On 1 July 1971 with the inactivation of the 38th Rescue Squadron, Detachment 3 became a detachment of the3d Aerospace Rescue and Recovery Group.[28]: 115 Detachment 3 was inactivated in August 1974 with the winding down of base operations.[28]: 136
TwoA-1 Skyraiders of the1st Special Operations Squadron were usually based at Ubon to escort combat search and rescue missions over southern Laos and Cambodia.[28]: 124 From December 1971 a detachment of 2HH-53s fromNakhon Phanom Royal Thai Navy Base were based at Ubon for combat search and rescue missions.[28]: 134
From February to October 1967EC-121 Warning Star aircraft of theCollege Eye Task Force were based at Ubon.[13]: 99
The 222nd Tactical Fighter Squadron, RTAF, performed their mission withT-28s, C-47s andUH-34 helicopters.
TheParis Peace Accords were signed on 27 January 1973 by the governments of North Vietnam, South Vietnam, and the United States with the intent to establish peace in Vietnam. The accords effectively ended United States military operations in North and South Vietnam. Laos and Cambodia, however, were not signatories to the Paris agreement and remained in states of war.
The US was helping theRoyal Lao Government achieve whatever advantage possible before working out a settlement with thePathet Lao and their allies. The USAF flew 386 combat sorties over Laos during January and 1,449 in February 1973. On 17 April, the USAF flew its last mission over Laos, attacking a handful of targets requested by the Laotian government.
In Cambodia the USAF carried out a massive bombing campaign to prevent theKhmer Rouge from taking over the country.
Congressional pressure in Washington grew against these bombings, and on 30 June 1973, theUnited States Congress passedPublic law PL 93-50 and 93–52, which cut off all funds for combat in Cambodia and all of Indochina effective 15 August 1973. Air strikes by the USAF peaked just before the deadline, as theKhmer National Armed Forces engaged a force of about 10,000 Khmer Rouge encirclingPhnom Penh.
At 11:00 15 August 1973, the Congressionally-mandated cutoff went into effect, bringing combat activities over the skies of Cambodia to an end. The last of theConstant Guard F–4 augmentation forces were released in September 1973.
In mid-1974 the wing began to lose personnel, aircraft, and units. The last scheduled F–4 training flight occurred on 16 July 1974 and on 16 September the wing and most of its components moved without personnel or equipment toKunsan Air Base, South Korea, where the wing absorbed resources of the 3d TFW that had moved without personnel or equipment to the Philippines.
On 16 September 1974 the USAF forces at Ubon were inactivated and the facility turned over to the Thai Government.
On 11/12 April Ubon served as a staging base for 8 HH-53s of the40th Aerospace Rescue and Recovery Squadron as they took part inOperation Eagle Pull, the evacuation of US civilians from Phnom Penh.[28]: 140
This article incorporatespublic domain material from the Air Force Historical Research Agency
{{cite book}}: CS1 maint: numeric names: authors list (link)