Operation Toan Thang 1/71

Last updated
Operation Toan Thang 1/71
Part of the Vietnam War
Map of Operation Toan Thang 01.71.jpg
Map of Operation Toan Thang 1/71
Date4 February – June 1971
Location
Highway 7, Cambodia
Result indecisive
Belligerents
Flag of South Vietnam.svg South Vietnam
Flag of the Khmer Republic.svg Khmer Republic
Flag of the United States (Pantone).svg United States
Flag of North Vietnam (1955-1975).svg North Vietnam
Flag of Democratic Kampuchea.svg Khmer Rouge
Commanders and leaders
Đỗ Cao Trí
Nguyễn Văn Minh
Units involved
Flag of South Vietnam.svg 5th Infantry Division
Casualties and losses
Flag of South Vietnam.svg 133+ killed, 130 missing
Flag of the United States (Pantone).svg 2 killed
South Vietnamese body count: 1,143 killed

Operation Toan Thang 1/71 was an operation during the Vietnam War conducted by South Vietnamese forces from 4 February to June 1971 to reopen Highway 7 in Cambodia and destroy North Vietnamese bases.

Contents

Background

With the pro-American Khmer Republic government still under severe threat and the People's Army of Vietnam (PAVN) rebuilding their supply lines, COMUSMACV General Creighton Abrams and Chairman of the South Vietnamese Joint General Staff, General Cao Văn Viên agreed on a new incursion into Cambodia. Because the United States Congress had just adopted the revised Cooper-Church Amendment banning U.S. ground troops from entering Cambodia, American support would be limited to Army and Air Force aviation overhead and Army artillery based in South Vietnam. [1] :47

The goal of Operation Toan Thang 1/71 was to destroy PAVN and Khmer Rouge bases and to help the Cambodian forces reestablish control over the area north of Highway 7 up to the Mekong River town of Kratié. [1] :47–9

Operation

On 4 February 1971, Lieutenant general Đỗ Cao Trí led the first of 16,000 Army of the Republic of Vietnam (ARVN) troops into Cambodia. Initially the troops concentrated on clearing Highway 7 between Snuol and Chup, and for the most part the PAVN avoided contact. [1] :47

On 26 February, however, advancing ARVN troops came under fire from a line of bunkers concealed in a tree line. Captain Jon E. Swanson of the 1st Squadron, 9th Cavalry Regiment, swept down in his OH-6A scout helicopter to engage the enemy with grenades and machine guns. After destroying five bunkers he came under fire from an antiaircraft machine gun. Despite having expended his grenades, he engaged the position with machine guns and knocked it out. When a second antiaircraft gun opened fire, hitting his helicopter, he attacked again before directing an Army helicopter gunship to destroy the target. He was then engaged by a third antiaircraft gun. Ignoring his own safety he flew his damaged and now virtually unarmed helicopter toward the enemy to mark the target for the gunships when enemy fire caused his helicopter to explode, killing him and his copilot. Swanson was posthumously awarded the Distinguished Service Cross for his actions that day. In 2002 the award was upgraded to the Medal of Honor. [1] :49

Trí had been killed in a helicopter accident on 23 February and his successor, General Nguyễn Văn Minh, was less aggressive. This combined with the South Vietnamese focus on Operation Lam Son 719, which had begun on 8 February but had bogged down, meant that the momentum behind the incursion had started to wane. [1] :49

The first large engagement occurred on 17 March, when two South Vietnamese task forces, supported by U.S. Army gunships, engaged a PAVN regiment in a two-day battle in the Chup Plantation, a major enemy depot. Two weeks later, a South Vietnamese task force defeated an enemy battalion in a five-hour battle near Suong. [1] :49

After some additional activity around Snuol during the first week in April, the PAVN went to ground. Thereafter, ARVN troops focused on uprooting enemy supply caches. The operation remained relatively uneventful until the PAVN learned that the South Vietnamese planned to withdraw a task force of the 5th Infantry Division from Snuol in late May. The Battle of Snuol began on 25 May when three PAVN regiments massed to cut Highway 13, thereby trapping the task force in Snuol. An ARVN task force was sent up Highway 13 to relieve the besieged the task force, but the operation became a rout and the ARVN suffered heavy losses of men and equipment as they withdrew. [1] :49 The battle rendered the ARVN 5th Division combat ineffective in the estimation of its American advisers. [2] :338–9 According to II Field Force, Vietnam commander Michael S. Davison, the 5th Division troops were close to mutiny. [3] :478

Aftermath

Operation Toan Thang 1/71 ended in June. The senior U.S. adviser to III Corps, Major general Jack J. Wagstaff, declared the results mixed. The operation had imposed heavy casualties on the PAVN, tying down three enemy divisions away from South Vietnam and further bolstering the Khmer Republic. On the other hand, the South Vietnamese had not done significant damage to the enemy's logistical network and the debacle at Snuol once again raised questions about the progress of Vietnamization. [1] :50

Related Research Articles

<span class="mw-page-title-main">Easter Offensive</span> Part of the Vietnam War (1972)

The Easter Offensive, also known as the 1972 spring–summer offensive by North Vietnam, or the Red Fiery Summer as romanticized in South Vietnamese literature, was a military campaign conducted by the People's Army of Vietnam against the Army of the Republic of Vietnam and the United States military between 30 March and 22 October 1972, during the Vietnam War.

<span class="mw-page-title-main">Nguyễn Văn Hiếu</span>

Major General Nguyễn Văn Hiếu was a general in the South Vietnamese Army of the Republic of Vietnam (ARVN). As a child he lived in Shanghai. He later emigrated with his ethnic Vietnamese parents to Saigon when the Chinese Communist Party took over China in 1949. He attended Aurore University in Shanghai, China. In 1950, he attended the Vietnamese Military Academy, graduating second in his class in 1951. In 1963, he graduated from Command and General Staff College, at Fort Leavenworth, Kansas.

<span class="mw-page-title-main">Cambodian campaign</span> Invasion of Cambodia by US and South Vietnamese forces (April–July 1970)

The Cambodian campaign was a series of military operations conducted in eastern Cambodia in mid-1970 by South Vietnam and the United States as an expansion of the Vietnam War and the Cambodian Civil War. Thirteen operations were conducted by the Army of the Republic of Vietnam (ARVN) between April 29 and July 22 and by U.S. forces between May 1 and June 30, 1970.

<span class="mw-page-title-main">Battle of Xuân Lộc</span> Last major battle of the Vietnam War

The Battle of Xuân Lộc was the last major battle of the Vietnam War that took place at Xuân Lộc, Đồng Nai Province. Over a period of twelve days between 9 and 21 April 1975, the outnumbered South Vietnamese reserves attempted to stop the North Vietnamese forces from overrunning the town and breaking through towards South Vietnam's capital, Saigon. The Army of the Republic of Vietnam (ARVN) committed almost all their remaining mobile forces, especially the 18th Division, under Brigadier General Lê Minh Đảo, to the defence of the strategic crossroads town of Xuân Lộc, hoping to stall the People's Army of Vietnam (PAVN) advance. The battle ended when the town of Xuân Lộc was captured by the PAVN 4th Army Corps led by Major General Hoàng Cầm.

<span class="mw-page-title-main">Operation Lam Son 719</span> Part of the Vietnam War (1971)

Operation Lam Son 719 or 9th Route – Southern Laos Campaign was a limited-objective offensive campaign conducted in the southeastern portion of the Kingdom of Laos. The campaign was carried out by the armed forces of South Vietnam between 8 February and 25 March 1971, during the Vietnam War. The United States provided logistical, aerial and artillery support for the operation, but its ground forces were prohibited by law from entering Laotian territory. The objective of the campaign was the disruption of a possible future offensive by the People's Army of Vietnam (PAVN), whose logistical system within Laos was known as the Ho Chi Minh Trail.

<span class="mw-page-title-main">Operation Chenla I</span> Part of the Vietnam and Cambodian Civil Wars (1970–1971)

Operation Chenla I or Chenla One was a major military operation conducted by the Khmer National Armed Forces (FANK) during the Cambodian Civil War. It began in late August 1970 and ended in February 1971, due to the FANK High Command's decision to withdraw some units from Tang Kauk to protect Phnom Penh after Pochentong airbase was attacked.

<span class="mw-page-title-main">Battle of Loc Ninh</span> 1972 battle of the Vietnam War

The Battle of Lộc Ninh was a major battle fought during the Easter Offensive during the Vietnam War, which took place in Bình Long Province, South Vietnam between 4 and 7 April 1972. Towards the end of 1971, North Vietnamese leaders decided to launch a major offensive against South Vietnam, with the objective of destroying Army of the Republic of Vietnam (ARVN) units and capturing as much territory as possible, in order to strengthen their bargaining position in the Paris Peace Accords. On 30 March 1972, two People's Army of Vietnam (PAVN) divisions smashed through the Vietnamese Demilitarized Zone, marking the commencement of the Easter Offensive. They quickly overwhelmed South Vietnamese units in the I Corps Tactical Zone. With the rapid collapse of South Vietnamese forces in the northern provinces of South Vietnam, PAVN and Viet Cong (VC) forces began preparing for their next offensive, targeting Bình Long Province in the rubber plantation region north of Saigon. On 4 April, the VC 5th Division opened their attack on Lộc Ninh, defended by the ARVN 9th Infantry Regiment. After three days of fighting, the vastly outnumbered ARVN forces, though well supported by American air power, were forced to abandon their positions in Lộc Ninh.

The Battle of Snuol, fought in Snuol, Cambodia, was a major battle of the Vietnam War, between the Army of the Republic of Vietnam (ARVN) and the People's Army of Vietnam (PAVN) as part of Operation Toan Thang 1/71. The battle lasted from 25 to 30 May 1971.

<span class="mw-page-title-main">18th Division (South Vietnam)</span> Army of the Republic of Vietnam (ARVN)

The 18th Division was an infantry division in the III Corps of the Army of the Republic of Vietnam (ARVN). The U.S. Military Assistance Command Vietnam considered the 18th as undisciplined and was well known throughout the ARVN for its "cowboy" reputation. In 1975 the 18th was made famous for its tenacious defense of Xuân Lộc, the last major battle before the Fall of Saigon.

<span class="mw-page-title-main">Vietnamese Rangers</span> Rangers of the former Army of South Vietnam

The Vietnamese Rangers (Vietnamese: Biệt Động Quân), commonly known as the ARVN Rangers or Vietnamese Ranger Corp (VNRC), were the light infantry of the Army of the Republic of Vietnam. Trained and assisted by American Special Forces and Ranger advisers, the Vietnamese Rangers infiltrated beyond enemy lines in search and destroy missions. Initially trained as a counter-insurgency light infantry force by removing the fourth company each of the existing infantry battalions, they later expanded into a swing force capable of conventional as well as counter-insurgency operations, and were relied on to retake captured regions. Later during Vietnamization the Civilian Irregular Defense Group program was transferred from MACV and integrated as Border Battalions responsible for manning remote outposts in the Central Highlands.

<span class="mw-page-title-main">5th Division (South Vietnam)</span> Military unit

The Fifth Division of the Army of the Republic of Vietnam (ARVN)—the army of the nation state of South Vietnam that existed from 1955 to 1975—was part of the III Corps that oversaw the region of the country surrounding the capital, Saigon.

<span class="mw-page-title-main">25th Division (South Vietnam)</span> Military unit

The 25th Division of the Army of the Republic of Vietnam (ARVN)—the army of the nation state of South Vietnam that existed from 1955 to 1975—was part of the III Corps that oversaw the region of the country surrounding the capital, Saigon. It was based at Củ Chi Base Camp to the northwest of the city.

<span class="mw-page-title-main">Republic of Vietnam Airborne Division</span> Military unit

The Vietnamese Airborne Division or VNAD was one of the earliest components of the Republic of Vietnam Military Forces. The Vietnamese Airborne Division began as companies organized in 1948, prior to any agreement over armed forces in Vietnam. After the partition of Vietnam, it became a part of the Army of the Republic of Vietnam. This division had its distinct origins in French-trained paratrooper battalions, with predecessor battalions participating in major battles including Dien Bien Phu and retained distinct uniforms and regalia. With the formation of an independent republic, the colonial paratroopers were dissolved, however regalia and aesthetics alongside the nickname "Bawouans" would be retained.

<span class="mw-page-title-main">Operation Toan Thang I</span> Part of the Vietnam War (1968)

Operation Toan Thang I was a U.S. Army, Army of the Republic of Vietnam (ARVN), 1st Australian Task Force and Royal Thai Volunteer Regiment operation conducted between 8 April and 31 May 1968 in the Vietnam War. The operation was part of a reaction to the Tet Offensive designed to put pressure on Vietcong (VC) and People's Army of Vietnam (PAVN) forces involving the South Vietnamese III Corps.

<span class="mw-page-title-main">1970 in the Vietnam War</span>

The United States continued its unilateral withdrawal of forces from South Vietnam notwithstanding the lack of progress at the Paris Peace Talks. The removal of Prince Norodom Sihanouk from power in Cambodia in March and his replacement by General Lon Nol, began the Cambodian Civil War. South Vietnamese and U.S. forces entered Cambodia in late April to attack People's Army of Vietnam (PAVN) and Vietcong (VC) bases and supply lines there which had long been used to support the insurgency in South Vietnam. The expansion of the war revitalized the antiwar movement in the U.S. and led to the Kent State shootings and Jackson State killings in May. While U.S. ground forces withdrew from Cambodia at the end of June and legislation was passed to prevent their reintroduction, the South Vietnamese conducted operations in Cambodia for the rest of the year and the U.S. provided air support and military aid to the Cambodian government. Despite this support the Cambodians lost control of vast areas of the country to the PAVN. Within South Vietnam the second half of the year saw a reduction in large U.S. operations with the focus shifting to pacification and population security and supporting Vietnamization. The PAVN/VC generally reverted to sapper attacks and attacks by fire but they fought hard to defend their base areas and infiltration routes.

<span class="mw-page-title-main">1971 in the Vietnam War</span>

At the start of 1971 South Vietnamese troops continued operations against the North Vietnamese People's Army of Vietnam (PAVN) and Vietcong (VC) base areas in eastern Cambodia. The ill-conceived and poorly executed Operation Lam Son 719 against PAVN supply lines in eastern Laos showed the weaknesses within the South Vietnamese military command and the limited ability of South Vietnam's armed forces to conduct large-scale combined arms operations. The U.S. continued its unilateral withdrawal from South Vietnam despite the lack of any progress in the Paris Peace Talks and by November U.S. forces had ceased offensive operations. The U.S. withdrawal and antiwar sentiment within the military led to an ongoing decline in morale and discipline within the U.S. forces and growing drug use, particularly of heroin. As U.S. combat units withdrew, security in their former operational areas deteriorated and the PAVN/VC began a series of attacks on ARVN positions in Quảng Trị province and the Central Highlands. In Cambodia the Cambodian government continued to lose ground to the PAVN despite extensive U.S. air support and training and periodic attacks into Cambodia by the ARVN. While the bombing of North Vietnam had ceased in November 1968, U.S. aircraft continued to conduct reconnaissance flights over the North and responded to radar-tracking and antiaircraft fire with "protective reaction" strikes which numbered more than 100 by the year-end and culminated in a five-day bombing campaign in late December.

Operation Colorado/Lien Ket 52 was a US Marine Corps and Army of the Republic of Vietnam (ARVN) operation that took place in the Hiệp Đức District, lasting from 6–22 August 1966 planned by Major General Lewis J. Fields, Commanding General of 1st Marine Division.

The Battle of Quang Duc took place from 30 October to 10 December 1973 when North Vietnamese forces attempted to occupy part of Quang Duc Province to expand their logistical network from Cambodia into South Vietnam. While the North Vietnamese attacks were initially successful they were eventually forced out by the South Vietnamese.

Operation Cuu Long 44-02 was an operation during the Vietnam War conducted by South Vietnamese and Cambodian forces from 13-25 January 1971 to reopen Route 4 in Cambodia.

<span class="mw-page-title-main">Battle of the Mỹ Chánh Line</span> Part of the Vietnam War (1972)

The Battle of the Mỹ Chánh Line took place from 5 May to 26 June 1972 during the People’s Army of Vietnam (PAVN)'s Easter Offensive of the Vietnam War. South Vietnamese forces, principally the Marine Division, with extensive fire and logistics support from United States forces, succeeded in stopping the PAVN advance northwest of Huế and launched a series of spoiling attacks against PAVN units. The successful defense allowed South Vietnamese forces to build up strength and then establish jumping off positions for their counteroffensive to recapture Quảng Trị Province.

References

  1. 1 2 3 4 5 6 7 8 Birtle, Andrew; Maass, John (2019). The U.S. Army campaigns of the Vietnam War: The Drawdown 1970–1971. Center of Military History United States Army. ISBN   9781088823613.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  2. Cosmas, Graham (2006). The United States Army in Vietnam MACV The Joint Command in the Years of Withdrawal, 1968–1973. United States Army Center of Military History. ISBN   9780160771187.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  3. Clarke, Jeffrey (1998). The U.S. Army in Vietnam Advice and Support: The Final Years, 1965–1973 (PDF). U.S. Army Center of Military History. ISBN   978-1518612619.PD-icon.svg This article incorporates text from this source, which is in the public domain .