Gulf of Tonkin Resolution Timeline

Soviet workers built and installed radar stations and surface-to-air missile batteries across North Vietnam while training North Vietnamese personnel in their use.

Image source: Vietnam Air Defence - Air Force

South Vietnamese commandos began maritime raids against coastal North Vietnam under American naval operational command as part of Operation 34A.

South Vietnamese commandos attempted to attack a North Vietnamese radar station on Hon Me island. They were detected before landing, and North Vietnamese forces opened fire.

Image source: Gulf of Tonkin incident

USS Maddox, conducting a DESOTO patrol in the Gulf of Tonkin, reported being attacked by three North Vietnamese Navy torpedo boats. Maddox fired more than 280 five-inch shells, while the boats launched six torpedoes, all of which missed.

South Vietnamese Swift boats raided Cape Vinhson and Cua Ron as tensions continued along the North Vietnamese coast.

During a stormy night, USS Maddox and USS Turner Joy reported that North Vietnamese torpedo boats were attacking. Turner Joy fired approximately 220 shells at radar contacts, although later evidence cast doubt on whether enemy vessels were present.

Johnson told several congressmen that North Vietnam had attacked an American patrol in international waters and promised retaliation, helping create the political conditions for congressional action.

Johnson submitted the resolution to Congress. It would authorize him to take all necessary measures, including force, to prevent further aggression and protect peace and security in Southeast Asia.

The Gulf of Tonkin Resolution was enacted as Public Law 88-408. It became the principal congressional authorization cited for the major expansion of U.S. military involvement in Vietnam.

After less than nine hours of committee consideration and floor debate, Congress passed the joint resolution authorizing the president to take all necessary steps, including armed force, to assist members or protocol states of the Southeast Asia Collective Defense Treaty.

J. Blair Seaborn arrived in Hanoi to meet North Vietnamese Premier Pham Van Dong, continuing diplomatic communications amid the escalation.

Viet Cong guerrillas attacked Bien Hoa Air Base, killing five American servicemen and destroying six B-57 bombers.

Image source: Bien Hoa Air Base

McNamara, Rusk, and McGeorge Bundy presented Johnson with three policy options, using what became known as the Goldilocks Principle. The extreme choices were invasion of North Vietnam or abandonment of South Vietnam.

The Viet Cong bombed the Brinks Hotel in Saigon, killing two Americans and further intensifying pressure on the Johnson administration.

Image source: 1964 Brinks Hotel bombing

A memorandum by McGeorge Bundy and McNamara stated that the existing policy could lead only to disastrous defeat. It presented withdrawal or committing American forces to war as the remaining alternatives.

After a Viet Cong attack on the American base at Pleiku, Johnson ordered Operation Flaming Dart, a bombing raid against a North Vietnamese Army base and the beginning of increasingly intense air operations.

General William Westmoreland said he did not trust the Army of the Republic of Vietnam to protect the American air base at Danang and requested two Marine battalions. Johnson approved the request.

Image source: Operation Starlite

Johnson ordered Operation Rolling Thunder, the sustained strategic bombing campaign against North Vietnam that senior advisers had long urged.

Image source: Operation Rolling Thunder

Two battalions of U.S. Marines landed at Danang to protect the air base, marking the beginning of the large-scale deployment of American ground troops.

Johnson agreed to send two additional Marine battalions and 28,000 logistical troops after the Joint Chiefs recommended expanding the American commitment.

Johnson approved a plan to send 40,000 U.S. Army troops to South Vietnam by June, transforming the conflict into a major American ground war.

Johnson addressed the nation on television and announced that he had asked General Westmoreland what additional forces were needed to meet the mounting aggression, defending continued escalation.

Senator Wayne Morse introduced a motion to repeal the resolution, arguing that it was unconstitutional and had been used beyond the limited purpose Johnson had promised.

As the U.S. involvement became increasingly costly, the administration’s justification for the war and its use of the Gulf of Tonkin Resolution came under growing scrutiny.

The administration of President Richard Nixon initially opposed repeal, warning that repeal would have consequences for Southeast Asia beyond the Vietnam War.

Image source: Richard Nixon

The Nixon administration began arguing that U.S. operations in Southeast Asia rested not on the Gulf of Tonkin Resolution but on the president’s constitutional authority as commander in chief to protect American troops during their withdrawal.

Mounting public opposition to the war led Congress to attach repeal of the Gulf of Tonkin Resolution to the Foreign Military Sales Act, which Nixon signed in January 1971.

Congress passed the War Powers Resolution to restore limits on presidential authority to engage U.S. forces without a formal declaration of war. Nixon vetoed it, but Congress overrode the veto.