10.3 Vietnam: Escalation, Tet, and the Antiwar Movement

Why Vietnam is a wars-and-protest unit

This exam’s diplomacy theme is not a list of jungle place-names. It is cause and effect: how a Cold War containment decision, inherited from Truman and Eisenhower, became a half-million-person American war, and how Tet, atrocities, the draft, and leaked secrets produced the largest sustained antiwar movement in modern U.S. history. Independent OpenExamPrep teaching keeps Nixon’s China opening and Watergate in Chapter 11. Vietnamization, Cambodia, and the Paris Accords stay here because they are war policy.

Do not start the story at Tonkin as if Indochina had been empty. France lost at Dien Bien Phu (1954). The Geneva Accords of July 1954 temporarily divided Vietnam at the 17th parallel, with nationwide elections advertised for 1956. The United States did not sign the accords but moved in behind Ngo Dinh Diem in Saigon. Diem, a Catholic nationalist, refused the 1956 elections that Ho Chi Minh would likely have won, crushed sects and communists, and built a personalist regime. Viet Cong insurgency in the South and North Vietnamese support grew. Kennedy increased advisers (Section 10.1). On 1–2 November 1963 Diem was overthrown and killed in a coup the U.S. embassy had signaled it would not stop. Three weeks later Kennedy was dead. Johnson inherited a Saigon revolving door of generals, not a stable ally.

Gulf of Tonkin, 1964

On 2 August 1964 North Vietnamese patrol boats attacked the destroyer USS Maddox in the Gulf of Tonkin. A 4 August report of a second attack on Maddox and Turner Joy—in bad weather, on ambiguous radar—was almost certainly mistaken, a conclusion later official studies and the Pentagon Papers trail would underline. Johnson ordered retaliatory air strikes and asked Congress for a resolution. On 7 August 1964 the Tonkin Gulf Resolution passed the House 416–0 and the Senate 88–2. The dissenters were Democrats Wayne Morse of Oregon and Ernest Gruening of Alaska. Johnson signed it on 10 August. The text authorized the president to take “all necessary measures” to repel attacks and to assist SEATO protocol states. It was not a declaration of war. It was treated as one. Johnson campaigned in 1964 as the man who would not send American boys to fight an Asian war that Asian boys should fight—then used Tonkin as the blank check for 1965.

Rolling Thunder, search and destroy

Operation Rolling Thunder, a graduated bombing campaign against the North, ran from 2 March 1965 to 31 October 1968. Johnson personally approved many targets, hoping to signal Hanoi without drawing in China or the Soviet Union as full belligerents. The Marines landed at Da Nang on 8 March 1965 to guard airfields; combat battalions followed. General William C. Westmoreland pursued attrition: search and destroy, body counts, and the assumption that the United States could inflict more pain than Hanoi could bear. Ia Drang (November 1965) showed both U.S. airmobile firepower and the enemy’s willingness to take horrific losses. Free-fire zones, Agent Orange defoliation, and napalm became the visual vocabulary of the war. ARVN (South Vietnamese army) performance was uneven; corruption and desertion never disappeared from U.S. after-action complaints.

Year-end U.S. military personnel in South Vietnam in the standard Department of Defense series used in textbooks jumped from about 23,300 (1964) to 184,300 (1965) to 385,300 (1966) to 485,600 (1967) to 536,100 (1968). The peak was 543,400 in April 1969, already under Nixon, before Vietnamization cut the numbers. Those figures are in-country personnel, not “only infantry riflemen.”

Tet, 1968

On 30–31 January 1968 (some attacks a day earlier), during the Tet lunar new year, North Vietnamese and Viet Cong forces struck cities and bases across the South, including a sapper raid on the U.S. Embassy compound in Saigon. Militarily, the offensive failed. The Viet Cong infrastructure in the South was shattered; Hue was recaptured after brutal fighting; Khe Sanh was held. Politically, Tet broke official optimism. Americans had been told there was a light at the end of the tunnel. Television showed urban combat in Saigon. Walter Cronkite’s February 1968 special is the usual textbook marker that trusted news had labeled the war a stalemate. On 31 March 1968 Johnson capped Rolling Thunder, announced he would not run for another term, and opened talks. Eugene McCarthy’s New Hampshire showing and Robert Kennedy’s entry had already made the Democratic Party a referendum on the war. The assassination of Martin Luther King Jr. (4 April) and of RFK (June) belong with 1968’s domestic trauma; the war is why Chicago’s Democratic convention exploded in August.

Tet’s exam sentence: communist military defeat, U.S. political shock. A stem that says Tet “proved Westmoreland was about to occupy Hanoi” is wrong. A stem that says Tet “was a U.S. battlefield surrender” is also wrong.

My Lai, Vietnamization, Cambodia, Kent State

On 16 March 1968 a U.S. infantry unit massacred hundreds of civilians at My Lai (Son My). The Army buried the story until Ronald Ridenhour’s letters and Seymour Hersh’s reporting, with Ronald Haeberle’s photographs, made it public in November 1969. Lieutenant William Calley was the most famous defendant. My Lai did not “begin” the antiwar movement, which already existed, but it stripped remaining moral claims that American firepower was inherently discriminating.

Richard Nixon, elected in 1968 as a man with a “secret plan,” pursued Vietnamization: withdraw U.S. ground forces, arm and expand ARVN, and negotiate while bombing. The Nixon Doctrine (Guam, July 1969) said Asian allies should supply the manpower. Troop levels fell. Draft lotteries (1969) changed who served. On 30 April 1970 Nixon announced an incursion into Cambodia to hit sanctuaries—following earlier secret Menu bombings (1969–70) that Congress and the public had not been told about in full. Campuses exploded. On 4 May 1970 the Ohio National Guard killed four students at Kent State University and wounded nine. Jackson State police fire killed two on 15 May 1970. A student strike closed hundreds of campuses. Congress later repealed the Tonkin Resolution (1971) and, in 1973, passed the War Powers Resolution over Nixon’s veto—a Vietnam-era check on presidential war-making that Chapter 11 will meet again beside Watergate, not a reason to start Watergate here.

Pentagon Papers, Paris, Saigon

In June 1971 the New York Times (then the Washington Post) published the Pentagon Papers, a classified Defense Department history leaked by Daniel Ellsberg. The study documented optimism for the record and pessimism in private across administrations. The Supreme Court in New York Times Co. v. United States (1971) blocked prior restraint. The papers did not “lose the war” by themselves; they confirmed what antiwar critics had argued about credibility gaps from Tonkin onward.

Henry Kissinger and Le Duc Tho produced the Paris Peace Accords, signed 27 January 1973. U.S. combat troops left; POWs came home; North Vietnamese troops remained in the South—the clause that made the “peace” a cease-fire overlay on an unfinished war. Congress cut aid. Without U.S. air power, ARVN collapsed in 1975. Saigon fell on 30 April 1975; helicopters lifted the last Americans and desperate Vietnamese from rooftops. The country was reunified under Hanoi. Roughly 58,000 American names are on the Vietnam Veterans Memorial. Vietnamese, Cambodian, and Lao dead run into the millions in commonly cited ranges; survey items rarely require a single disputed total, but they do require 1973 out, 1975 fall.

The antiwar movement was not one committee. It included teach-ins (1965), SDS (Section 10.4), clergy, veterans (VVAW), Moratorium (15 October 1969) and Mobilization (15 November 1969) mass marches, draft resistance and exile to Canada, and, after 1968, a liberal Democratic insurgency inside the party. Working-class hawks and many soldiers resented campus deferments. That class split is a social-history tag, not an excuse to forget Tet as the credibility break.