The Vietnam War

Read this article on the history of the Vietnam War. What began as a conflict over decolonization became a Cold War battlefield by the late 1960s, with U.S. troops fighting communist North Vietnamese troops, who were given weapons and support from China and the Soviet Union.

Vietnamization and American Withdrawal 1969–1974

Richard Nixon Searches for Peace with Honor

Nixon had continuously campaigned under the slogan that he "had a plan to end the Vietnam War." The goal of the American military effort under Nixon was to buy time, gradually build up the strength of the South Vietnamese armed forces, and to re-equip them with modern weapons so that they could defend their nation on their own. This policy became the cornerstone of the so-called "Nixon Doctrine." As applied to Vietnam, it was labeled "Vietnamization."

President Johnson (turned away from the camera) in conversation with Chairman of the Joint Chiefs of Staff Earle Wheeler (l)

President Johnson (turned away from the camera) in conversation with Chairman of the Joint Chiefs of Staff Earle Wheeler (l) and General Creighton Abrams (r)


One of Nixon's main foreign policy goals had been the achievement of a breakthrough in U.S. relations with China and the Soviet Union. Nixon, whose anti-communist credentials were well established, could make diplomatic overtures to the communists without being accused of being "soft." The result of his overtures was an era of détente that led to nuclear arms reductions by the United States and Soviet Union and the beginning of a dialogue with China. In this context, Nixon viewed Vietnam as simply another limited conflict forming part of the larger tapestry of superpower relations; however, he was still doggedly determined to preserve South Vietnam until such time as he could not be blamed for what he saw as its inevitable collapse (or a "decent interval," as it was known). To this end, he and his National Security Adviser, Henry Kissinger, employed Chinese and Soviet foreign policy gambits to successfully defuse some of the anti-war opposition at home and secure movement at the negotiating table in Paris.

To some extent, Nixon was successful in convincing the Soviets and the Chinese to reduce their military support for Vietnam. He argued to the Soviets that this would facilitate the strategic arms limitations talks that the Soviet Union sought. He told the Chinese that this would facilitate ending the impasse in US-China relations. However, as the Watergate scandal lost Nixon's popular support in America, Soviet support for Vietnam was renewed.


Operation Menu and the Cambodian Incursion, 1969-1970

By 1969, the policy of non-alignment and neutrality had become less appealing to Prince Sihanouk. Due to pressures from the right in Cambodia, he began a shift from the pro-left position he had assumed in 1965-1966. Making overtures for normalized relations with the United States, he created a Government of National Salvation with the assistance of the pro-American General Lon Nol. Seeing a shift in the prince's position, President Nixon ordered the launching of a top-secret bombing campaign targeted at the PAVN/NLF Base Areas and sanctuaries along Cambodia's eastern border.

The massive B-52 strikes (Operation Menu) deluged Cambodia for 14 months. They delivered approximately 2,756,941 tons of bombs, more than the total tonnage that the Allies dropped "during all of World War II, including the bombs that struck Hiroshima and Nagasaki." According to historians Ben Kiernan and Taylor Owen, "Cambodia may well be the most heavily bombed country in history."[9]

On March 18, 1970, Sihanouk, who was out of the country on a state visit, was deposed by a vote of the National Assembly and replaced by Lon Nol. Cambodia's ports were immediately closed to North Vietnamese military supplies, and the government demanded that the PAVN be removed from the border areas. Taking advantage of the situation, Nixon ordered a military incursion into Cambodia by U.S. and ARVN troops in order to both destroy PAVN/NLF sanctuaries bordering South Vietnam and to buy time for the U.S. withdrawal. During the Cambodian Incursion, U.S. and South Vietnamese forces discovered and removed or destroyed a huge logistical and intelligence haul in Cambodia.

The Cambodian incursion pushed the PAVN deeper into Cambodia, which destabilized the country and forced the North Vietnamese to openly support its despised allies, the Khmer Rouge, and allowed them to extend their power. During the incursion, South Vietnamese troops had gone on a rampage, in sharp contrast to the exemplary behavior that had been displayed by the communists, further increasing support for their cause. Sihanouk remained in China, where he established and headed a government in exile, throwing his personal support behind the Khmer Rouge, the North Vietnamese, and the Pathet Lao.


The Easter Offensive

Vietnamization received another severe test in the spring of 1972 when the North Vietnamese launched a massive conventional offensive across the DMZ. Beginning March 30, the Easter Offensive (known as the Nguyen Hue Offensive to the North Vietnamese) quickly overran the three northernmost provinces of South Vietnam, including the provincial capital of Quang Tri City. PAVN forces then drove south toward Hue.

Early in April, the PAVN opened two additional operations. The first, a three-division thrust supported by tanks and heavy artillery, came out of Cambodia on April 5. The PAVN seized Loc Ninh and advanced toward the provincial capital of An Loc in Binh Long Province. The second, launched from the tri-border region into the Central Highlands, seized a complex of ARVN outposts near Dak To and then advanced toward Kontum, threatening to split South Vietnam in two.

The United States countered with a buildup of American air power to support ARVN defensive operations and to conduct Operation Linebacker, the first bombing of North Vietnam since the bombing halt of 1968. The PAVN attacks against Hue, An Loc, and Kontum were contained, and the ARVN launched a counteroffensive in May to retake the lost northern provinces.

On September 10, the South Vietnamese flag once again flew over the Citadel of Quang Tri City, but the ARVN offensive then ran out of steam, conceding the rest of the occupied territory to the North Vietnamese. South Vietnam had countered the heaviest attack since Tet, but it was very evident that it was totally dependent on U.S. air power for its survival. Meanwhile, the withdrawal of American troops, who now numbered less than 100,000 at the beginning of the year, was continued as scheduled. By June, only six infantry battalions remained. On August 12, the last American ground combat troops left the country.


The U.S. Presidential Election of 1972 and Operation Linebacker II

During the run-up to the 1972 presidential election, the war was again a major issue. The president ended Operation Linebacker on October 22, after an agreement had been reached between the U.S. and North Vietnamese negotiators. The head of the U.S. negotiating team, Henry Kissinger, declared that "peace is at hand" shortly before election day, dealing a death blow to McGovern's already doomed campaign. Kissinger had not, however, counted on the intransigence of South Vietnamese President Thieu, who refused to accept the agreement and demanded some 90 changes.

These the North Vietnamese refused to accept, and Nixon was not inclined to put too much pressure on Thieu just before the election, even though his victory was all but assured. The mood between the United States and DRV further turned sour when Hanoi went public with the details of the agreement. The Nixon Administration claimed that North Vietnamese negotiators had used the pronouncement as an opportunity to embarrass the president and weaken the United States. White House Press Secretary Ron Ziegler, on November 30, told the press that there would be no more public announcements concerning U.S. troop withdrawals from Vietnam due to the fact that force levels were then down to 27,000.

Due to Thieu's unhappiness with the agreement, primarily the stipulation that North Vietnamese troops could remain "in place" on South Vietnamese soil, the negotiations in Paris stalled as the North Vietnamese refused to accept Thieu's changes and retaliated with amendments of their own. To reassure Thieu of American resolve, Nixon ordered a massive bombing campaign against North Vietnam using B-52s and tactical aircraft in Operation Linebacker II, which began on December 18, with large raids against both Hanoi and Haiphong.

Nixon justified his actions by blaming the impasse in negotiations on the North Vietnamese, causing one commentator to describe his actions as "War by tantrum." Although this heavy bombing campaign caused protests, both domestically and internationally, and despite significant aircraft losses over North Vietnam, Nixon continued the operation until December 29. Nixon also exerted pressure on Thieu to accept the new terms of the agreement.


Return to Paris

On January 15, 1973, citing progress in peace negotiations, Nixon announced the suspension of all offensive actions against North Vietnam, to be followed by a unilateral withdrawal of all U.S. troops. The Paris Peace Accords on "Ending the War and Restoring Peace in Vietnam" were signed on January 27, officially ending direct U.S. involvement in the Vietnam War.

The agreement called for the withdrawal of all U.S. personnel and an exchange of prisoners of war. Within South Vietnam, a cease-fire was declared (to be overseen by a multi-national, 1,160-man International Control Commission force), and both ARVN and PAVN/NLF forces would remain in control of the areas they then occupied, effectively partitioning South Vietnam. Both sides pledged to work toward a compromise political solution, possibly resulting in a coalition government. In order to maximize the area under their control, both sides in South Vietnam almost immediately engaged in land-grabbing military operations, which turned into flashpoints.

The signing of the Accords was the main motivation for the awarding of the 1973 Nobel Peace Prize to Henry Kissinger and to leading North Vietnamese negotiator Le Duc Tho. A separate cease-fire had been installed in Laos in February. Five days before the signing of the agreement in Paris, Lyndon Johnson, under whose leadership America had entered the conflict, died.

The first U.S. prisoners of war were released by North Vietnam on February 11, and all U.S. military personnel were ordered to leave South Vietnam by March 29. As an inducement for Thieu's government to sign the agreement, Nixon had promised that the United States would provide financial and limited military support (in the form of air strikes) so that the South could continue to defend itself. But Nixon was fighting for his political life in the growing Watergate Scandal and facing an increasingly hostile Congress that held the power of the purse. The president was able to exert little influence on a hostile public long sick of the Vietnam War.

Nixon was unable to fulfill his promises to Thieu. Economic aid continued (after being cut nearly in half), but most of it was siphoned off by corrupt officials in the South Vietnamese government; little actually went to the military effort. At the same time, aid to North Vietnam from the Soviet Union increased. With the United States no longer heavily involved, both the United States and the Soviet Union no longer saw the war as significant to their relations. The balance of power shifted decisively in North Vietnam's favor, and the North subsequently launched a major military offensive against the South.