Fact check
Is it true: The Gulf of Tonkin Incident?
Yes — this is confirmed.
Established by the NSA historian Robert Hanyok's study (published in the classified Cryptologic Quarterly in early 2001 and declassified in late 2005), by General Giap's 1995 statement to Robert McNamara, and by McNamara's later acknowledgement that the attack did not happen. The verdict covers the non-existence of the 4 August attack and its presentation as certain. It does not cover the stronger claim that it was deliberately invented: Moïse calls the original report a genuine mistake, and Hanyok found no conspiracy with the administration, though he calls the NSA's selective reporting deliberate.
The claim
The reported second North Vietnamese attack on US destroyers in the Gulf of Tonkin on 4 August 1964 did not happen, yet the Johnson administration treated it as certain, using it to order retaliatory air strikes and to obtain the Gulf of Tonkin Resolution. The verdict covers the non-existence of the 4 August attack and the way it was presented; it does not cover the stronger popular claim that Johnson or his officials deliberately invented the incident in order to start the Vietnam War.
Key evidence
NSA historian Robert Hanyok's study
August 2 incident was real
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