The Fake Attack That Dragged America Into Vietnam

There were two incidents in the Gulf of Tonkin. Almost everything that matters about the Vietnam War turns on the difference between them.

The first was real. On August 2, 1964, North Vietnamese torpedo boats attacked the destroyer USS Maddox in international waters. Nobody disputes this. There are photographs.

The second, on the night of August 4, did not happen. Radar operators on a dark and stormy sea reported torpedoes in the water. Within hours the President of the United States was on television telling the country its Navy had been attacked twice. Three days after that, Congress handed him the authority to wage war in Southeast Asia.

The night nothing happened

Conditions on August 4 were bad. Heavy weather, poor visibility, jumpy crews two days after a genuine attack. Sonar contacts and radar returns piled up. Ships fired into the dark for hours.

By morning the officers on the scene were already uncertain. The commander of the Maddox sent word urging a full review before further action, saying the reports appeared doubtful.

Johnson himself apparently did not believe it either. He is said to have remarked privately that the sailors had been shooting at flying fish.

He went on television anyway.

What the intelligence actually said

This is the part that stayed buried for forty years.

In 2005 and 2006 the National Security Agency declassified nearly 200 documents on the incident, including an internal study by agency historian Robert J. Hanyok, originally written for a classified in-house journal around 2000 and 2001.

Hanyok’s conclusion was blunt. No attack took place on August 4. And the signals intelligence used to convince the President and Congress that one had was not simply misread, it was misrepresented. Intercepts that actually referred to the real August 2 engagement, and to North Vietnamese efforts to recover boats damaged in it, were re-translated and selectively presented as confirmation of a second attack.

An internal NSA memo dated August 5, 1964 reportedly stated that it could not be determined from signals intelligence that an attack had occurred. It never reached the White House.

Analysts raised concerns about the quality of the evidence at the time. Those concerns went nowhere.

Naval History Magazine, reviewing the declassified material in 2008, described a deliberate effort by Defense Secretary Robert McNamara to distort the evidence and mislead Congress. McNamara briefed congressional leaders that the attacks were unequivocal while his own advisers were expressing doubts.

Three days to a war

On August 7, 1964, Congress passed the Southeast Asia Resolution, known ever since as the Gulf of Tonkin Resolution. The House voted 416 to 0. The Senate voted 88 to 2.

The two dissenters were Wayne Morse of Oregon and Ernest Gruening of Alaska. Morse argued on the floor that the resolution was unconstitutional and predicted it would bring the country lasting sorrow.

The text authorized the President to take all necessary measures to repel attacks on American forces and prevent further aggression in the region. It was not a declaration of war. It was better than one, from the perspective of an executive who wanted flexibility, because it had no enemy named and no end date.

Johnson signed it on August 10. It stayed in force until Congress repealed it in January 1971.

The part that should bother you

J. William Fulbright, chairman of the Senate Foreign Relations Committee, had personally steered the resolution through the Senate. He held hearings in 1968 that exposed how thin the case had been. He later said he had been misled, and called shepherding that resolution the worst act of his political career.

By the time it was repealed, more than 45,000 Americans had died in the war it authorized. The total death toll across Southeast Asia runs into the millions.

The common shorthand is that Tonkin was a lie. That is close but not quite right, and the truth is worse. It was a decision already made, looking for evidence, inside an intelligence system where nobody was rewarded for saying the evidence did not hold. The escalation was coming. August 4 supplied the paperwork.

That is the pattern worth remembering, because it is not unique to 1964. Intelligence bent to fit a policy, rather than a policy built on intelligence, has a long history and a short memory.