NSA:
For the first time ever, what will be presented in the following narrative is the complete SIGINT version of what happened in the Gulf of Tonkin between 2 and 4 August 1964. Until now, the NSA has officially maintained that the second incident of 4 August occurred. This position was established in the initial SIGINT reports of 4 August and sustained through a series of summary reports issued shortly after the crisis. In October 1964, a classified chronology of events for 2 to 4 August in the Gulf of Tonkin was published by NSA which furthered the contention that the second attack had occurred.
(S//SI) In maintaining the official version of the attack, the NSA made use of surprisingly few published SIGINT reports – fifteen in all. The research behind the new version which follows is based on the discovery of an enormous amount of never-before-used SIGINT material.
