Vietnam War

The **Vietnam War** (also known by other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vietnam and South Vietnam. The north was supported by the Soviet Union, China, and other communist states, while the south was supported by the United States and other anti-communist allies. The war is widely considered to be a Cold War-era proxy war. It lasted almost 20 years, with direct U.S. involvement ending in 1973. The conflict also spilled over into neighboring states, exacerbating the Laotian Civil War and the Cambodian Civil War, which ended with all three countries becoming communist states by 1975.

After the French military withdrawal from Indochina in 1954 – following their defeat in the First Indochina War – the Viet Minh took control of North Vietnam, and the U.S. assumed financial and military support for the South Vietnamese state. The Viet Cong (VC), a South Vietnamese common front under the direction of the north, initiated a guerrilla war in the south. The People's Army of Vietnam (PAVN), also known as the North Vietnamese Army (NVA), engaged in more conventional warfare with U.S. and South Vietnamese forces (ARVN). North Vietnam invaded Laos in 1958, establishing the Ho Chi Minh Trail to supply and reinforce the VC. By 1963, the north had sent 40,000 soldiers to fight in the south. U.S. involvement increased under President John F. Kennedy, from just under a thousand military advisors in 1959 to 23,000 by 1964.

Following the Gulf of Tonkin incident in August 1964, the U.S. Congress passed a resolution that gave President Lyndon B. Johnson broad authority to increase U.S. military presence in Vietnam, without a formal declaration of war. Johnson ordered the deployment of combat units for the first time, and dramatically increased the number of American troops to 184,000. U.S. and South Vietnamese forces relied on air superiority and overwhelming firepower to conduct search and destroy operations, involving ground forces, artillery, and airstrikes. The U.S. also conducted a large-scale strategic bombing campaign against North Vietnam, and continued significantly building up its forces, despite little progress being made. In 1968, North Vietnamese forces launched the Tet Offensive; though it was a military defeat for them, it became a political victory, as it caused U.S. domestic support for the war to fade. By the end of the year, the VC held little territory and were sidelined by the PAVN. In 1969, North Vietnam declared the Provisional Revolutionary Government of the Republic of South Vietnam. Operations crossed national borders, and the U.S. bombed North Vietnamese supply routes in Laos and Cambodia. The 1970 deposing of the Cambodian monarch, Norodom Sihanouk, resulted in a PAVN invasion of the country (at the request of the Khmer Rouge), and then a U.S.-ARVN counter-invasion, escalating the Cambodian Civil War. After the election of Richard Nixon in 1969, a policy of "Vietnamization" began, which saw the conflict fought by an expanded ARVN, while U.S. forces withdrew in the face of increasing domestic opposition. U.S. ground forces had largely withdrawn by early 1972, and their operations were limited to air support, artillery support, advisors, and materiel shipments. The Paris Peace Accords of January 1973 saw all U.S. forces withdrawn; accords were broken almost immediately, and fighting continued for two more years. Phnom Penh fell to the Khmer Rouge on 17 April 1975, while the 1975 spring offensive saw the Fall of Saigon to the PAVN on 30 April, marking the end of the war; North and South Vietnam were reunified the following year.

The war exacted an enormous human cost: estimates of the number of Vietnamese soldiers and civilians killed range from 966,000 to 3 million. Some 275,000–310,000 Cambodians, 20,000–62,000 Laotians, and 58,220 U.S. service members also died in the conflict. The end of the Vietnam War would precipitate the Vietnamese boat people and the larger Indochina refugee crisis, which saw millions of refugees leave Indochina, an estimated 250,000 of whom perished at sea. Once in power, the Khmer Rouge carried out the Cambodian genocide, while conflict between them and the unified Vietnam would eventually escalate into the Cambodian–Vietnamese War, which toppled the Khmer Rouge government in 1979. In response, China invaded Vietnam, with subsequent border conflicts lasting until 1991. Within the United States, the war gave rise to what was referred to as Vietnam Syndrome, a public aversion to American overseas military involvements, which, together with the Watergate scandal contributed to the crisis of confidence that affected America throughout the 1970s.

## Names

Further information: Terminology of the Vietnam War

Various names have been applied to the conflict. "Vietnam War" is the most commonly used name in English. It has also been called the "Second Indochina War" and the "Vietnam conflict".

Given that there have been several conflicts in Indochina, this particular conflict is known by its primary protagonists' names to distinguish it from others. In Vietnam, the war is generally known as the "Resistance war against the United States" (*Kháng chiến chống Mỹ*). It is also sometimes called the "American War".

## Background

Main articles: First Indochina War, 1940–1946 in French Indochina, and 1947–1950 in French Indochina

Further information: French Indochina in World War II and War in Vietnam (1945–1946)

See also: History of Vietnam, Tây Sơn wars, Cochinchina Campaign, Cần Vương, Việt Nam Quốc Dân Đảng, Yên Bái mutiny, and Operation Vulture

The primary military organizations involved in the war were the United States Armed Forces and the Army of the Republic of Vietnam, pitted against the People's Army of Vietnam (PAVN) (commonly called the North Vietnamese Army, or NVA, in English-language sources) and the National Front for the Liberation of South Vietnam (NLF, more commonly known as the Viet Cong (VC) in English language sources), a South Vietnamese communist guerrilla force.

Indochina had been a French colony from the late 19th century to the mid-20th century. When the Japanese invaded during World War II, the Viet Minh, a Communist-led common front under the leadership of Ho Chi Minh, opposed them with support from the US, the Soviet Union and China. They received some Japanese arms when Japan surrendered. On V-J Day, 2 September, Ho Chi Minh proclaimed in Hanoi the establishment of the Democratic Republic of Vietnam (DRV). The DRV ruled as the only civil government in all of Vietnam for 20 days, after the abdication of Emperor Bảo Đại, who had governed under the Japanese rule. On 23 September 1945, French forces overthrew the local DRV government, and declared French authority restored. The French gradually retook control of Indochina. Following unsuccessful negotiations, the Viet Minh initiated an insurgency against French rule. Hostilities escalated into the First Indochina War (beginning in December 1946).

By the 1950s, the conflict had become entwined with the Cold War. In January 1950, China and the Soviet Union recognized the Viet Minh's Democratic Republic of Vietnam, based in Hanoi, as the legitimate government of Vietnam. The following month the United States and Great Britain recognized the French-backed State of Vietnam in Saigon, led by former Emperor Bảo Đại, as the legitimate Vietnamese government. The outbreak of the Korean War in June 1950 convinced many Washington policymakers that the war in Indochina was an example of communist expansionism directed by the Soviet Union.

Military advisors from China began assisting the Viet Minh in July 1950. PRC weapons, expertise, and laborers transformed the Viet Minh from a guerrilla force into a regular army. In September 1950, the United States created a Military Assistance and Advisory Group (MAAG) to screen French requests for aid, advise on strategy, and train Vietnamese soldiers. By 1954, the United States had spent $1 billion in support of the French military effort, shouldering 80 percent of the cost of the war.

During the Battle of Dien Bien Phu (1954), U.S. carriers sailed to the Gulf of Tonkin and the U.S. conducted reconnaissance flights. France and the United States also discussed the use of three tactical nuclear weapons, although reports of how seriously this was considered and by whom are vague and contradictory. According to then-Vice President Richard Nixon, the Joint Chiefs of Staff drew up plans to use small tactical nuclear weapons to support the French. Nixon, a so-called "hawk" on Vietnam, suggested that the United States might have to "put American boys in". President Dwight D. Eisenhower made American participation contingent on British support, but the British were opposed. Eisenhower, wary of involving the United States in a land war in Asia, decided against military intervention. Throughout the conflict, U.S. intelligence estimates remained skeptical of France's chance of success.

On 7 May 1954, the French garrison at Dien Bien Phu surrendered. The defeat marked the end of French military involvement in Indochina. At the Geneva Conference, the French negotiated a ceasefire agreement with the Viet Minh, and independence was granted to Cambodia, Laos, and Vietnam.[*citation needed*]