The Geneva Accords of 1954 declared a cease-fire and divided Vietnam officially into North Vietnam (under Ho and his Communist forces) and South Vietnam (under a French-backed emperor). The dividing line was set at the 17th parallel and was surrounded by a demilitarized zone, or DMZ. The Geneva Accords stipulated that the divide was temporary and that Vietnam was to be reunified under free elections to be held in 1956.

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THE COLD WAR AND THE DOMINO THEORY

At this point, the United States’ Cold War foreign policy began to play a major part in Vietnam. U.S. policy at the time was dominated by the domino theory, which believed that the “fall” of North Vietnam to Communism might trigger all of Southeast Asia to fall, setting off a sort of Communist chain reaction. Within a year of the Geneva Accords, the United States therefore began to offer support to the anti-Communist politician Ngo Dinh Diem. With U.S. assistance, Diem took control of the South Vietnamese government in 1955, declared the Republic of Vietnam,and promptly canceled the elections that had been scheduled for 1956.

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JFK AND THE DIEM REGIME

Diem’s regime proved corrupt, oppressive, and extremely unpopular. Nonetheless, the United States continued to prop it up, fearful of the increasing Communist resistance activity it noted in South Vietnam. This resistance against Diem’s regime was organized by the Ho Chi Minh–backed National Liberation Front in South Vietnam, which became more commonly known as the Viet Cong, whose opposition to Diem by 1957 saw the country plunge into another war.  In 1962, U.S. president John F. Kennedy sent American “military advisors” to Vietnam to help train the South Vietnamese army, the ARVN, but quickly realized that the Diem regime was unsalvageable. Therefore, in 1963, the United States backed a coup that overthrew Diem and installed a new leader. The new U.S.-backed leaders proved just as corrupt and ineffective.

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JOHNSON AND AMERICANISATION - see video below

Kennedy’s successor, Lyndon B. Johnson, pledged to honor Kennedy’s commitments. After North Vietnamese forces allegedly attacked U.S. Navy ships in the Gulf of Tonkin in 1964, however, Johnson was given carte blanche in the form of the Gulf of Tonkin Resolution and began to send U.S. troops to Vietnam. Bombing campaigns such as 1965’s Operation Rolling Thunder ensued, and the conflict escalated. Johnson’s “Americanization” of the war led to a presence of nearly 400,000 U.S. troops in Vietnam by the end of 1966.

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A WAR OF ATTRITION - see video below

As the United States became increasingly mired in Vietnam, it pursued a strategy of attrition, attempting to bury the Vietnamese Communist forces under an avalanche of casualties. However, the Viet Cong’s guerrilla tactics frustrated and demoralized U.S. troops, while its dispersed, largely rural presence left American bomber planes with few targets. The United States therefore used unconventional weapons such as napalm and the herbicide defoliant Agent Orange but still managed to make little headway.

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THE TET OFFENSIVE - see video clip below

In 1968, the North Vietnamese Army and the Viet Cong launched a massive campaign called the Tet Offensive, attacking nearly thirty U.S. targets and dozens of other cities in South Vietnam at once. Although the United States pushed back the offensive and won a tactical victory, American media coverage characterized the conflict as a defeat, and U.S. public support for the war plummeted. Morale among U.S. troops also hit an all-time low, manifesting itself tragically in the 1968 My Lai Massacre, in which frustrated U.S. soldiers killed hundreds of unarmed Vietnamese civilians in a small village.

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MY LAI MASSACRE - see video clip below

The My Lai massacre was one of the most horrific incidents of violence committed against unarmed civilians during the Vietnam War. A company of American soldiers brutally killed most of the people—women, children and old men—in the village of My Lai on March 16, 1968. More than 500 people were slaughtered in the My Lai massacre, including young girls and women who were raped and mutilated before being killed. U.S. Army officers covered up the carnage for a year before it was reported in the American press, sparking a firestorm of international outrage. The brutality of the My Lai killings and the official cover-up fueled anti-war sentiment and further divided the United States over the Vietnam War.

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THE ANTIWAR MOVEMENT - see video clips below

Meanwhile, the antiwar movement within the United States gained momentum as student protesters, countercultural hippies, and even many mainstream Americans denounced the war. Protests against the war and the military draft grew increasingly violent, resulting in police brutality outside the Democratic National Convention in 1968 and the deaths of four students at Kent State University in 1970 when Ohio National Guardsmen fired on a crowd. Despite the protests, Johnson’s successor, President Richard M. Nixon, declared that a “silent majority” of Americans still supported the war.

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VIETNAMIZATION AND U.S. WITHDRAWAL

Nonetheless, Nixon promoted a policy of Vietnamization of the war, promising to withdraw U.S. troops gradually and hand over management of the war effort to the South Vietnamese. Although Nixon made good on his promise, he also illegally expanded the geographic scope of the war by authorizing the bombing of Viet Cong sites in the neutral nations of Cambodia and Laos, all without the knowledge or consent of the U.S. Congress. The revelation of these illegal actions, along with the publication of the secret Pentagon Papers in U.S. newspapers in 1971, caused an enormous scandal in the United States and forced Nixon to push for a peace settlement.

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THE CEASE-FIRE AND THE FALL OF SAIGON

After secret negotiations between U.S. emissary Henry A. Kissinger and North Vietnamese representative Le Duc Tho in 1972, Nixon engaged in diplomatic maneuvering with China and the USSR—and stepped up bombing of North Vietnam—to pressure the North Vietnamese into a settlement. This cease-fire was finally signed in January 1973, and the last U.S. military personnel left Vietnam in March 1973.

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The U.S. government continued to fund the South Vietnamese army, but this funding quickly dwindled. Meanwhile, as President Nixon became embroiled in the Watergate scandal that led to his resignation in August 1974, North Vietnamese forces stepped up their attacks on the South and finally launched an all-out offensive in the spring of 1975. On April 30, 1975, the South Vietnamese capital of Saigon fell to the North Vietnamese, who reunited the country under Communist rule as the Socialist Republic of Vietnam, ending the Vietnam War.