Gulf of Tonkin

Please Note: These historical documents are PDF images of formerly classified carbon paper and reports that have been declassified. Due to the age and poor quality of some of the PDF images, a screen reader may not be able to process the images into word documents. In accordance with Section 504 of the Rehabilitation Act of 1973, as amended, individuals may request that the government provide auxiliary aids or services to ensure effective communication of the substance of the documents. For such requests, please contact the Freedom of Information Act Office at or Public Affairs Office at 443-634-0721.

Gulf of Tonkin - 11/30/2005 and 05/30/2006

On 30 November 2005, the National Security Agency (NSA) released the first installment of previously classified information regarding the Vietnam era, specifically the Gulf of Tonkin incident. This release includes a variety of articles, chronologies of events, oral history interviews, signals intelligence (SIGINT) reports and translations, and other related memoranda.

On 30 May 2006, NSA released the second and final installment of Gulf of Tonkin materials. This final release includes additional articles, chronologies of events, oral history interviews, and other related memoranda.

The opinions expressed within the documents in both releases are those of the authors and individuals interviewed. They do not necessarily represent the official views of the National Security Agency.

The Gulf of Tonkin incident, like others in our nation's history, has become the center of considerable controversy and debate. It is not NSA's intention to prove or disprove any one set of conclusions, many of which can be drawn from a thorough review of this material. Instead, through these public releases, we intend to make as much information as possible available for the many scholars, historians, academia, and members of the general public who find interest in analyzing the information and forming their own conclusions.


 REL1_SECDEF (1).PDFMemorandum for the SecDef fm Director, DIA (and associated desknote dated 14 Dec 1967)
 REL2_WHITING_V2_OCT_1.PDFMemorandum from Allen S. Whiting to Thomas L. Hughes
 REL2_WHITING_V1_OCT_1.PDFMemorandum from Allen S. Whiting to Thomas L. Hughes
 REL2_WHITING_HUGHES_OCT_19.PDFMemorandum from Allen S. Whiting to Thomas L. Hughes
 REL1_MARCY_TORDELLA.PDFMemorandum from Carl Marcy to Dr. Louis Tordella
 REL1_VANCE.PDFMemorandum from Deputy Secretary of Defense Cyrus Vance to DIRNSA
 REL2_TORDELLA_FUBINI.PDFMemorandum from Dr. Louis Tordella to Assistant Secretary of Defense Eugene Fubini
 REL2_AUSTIN_TORDELLA.PDFMemorandum from Frank Austin to Dr. Louis Tordella regarding 16 August 1964 Washington Post article
 REL2_GRANT_RADAR.PDFMemorandum from Louis Grant regarding SIGINT information of DRV radar surveillance of U.S. STRIKE aircraft
 REL2_LANG_TO_BLAKE.PDFMemorandum from Lt Col Delmar Lang USAF to Lt Gen Gordon Blake USAF
 REL2_BLAKE_ANALYSIS.PDFMemorandum from Lt Gen Gordon Blake USAF to Deputy Secretary of Defense regarding "Analysis of SIGINT in the Tonkin Gulf Operations"
 REL2_BLAKE_USAF.PDFMemorandum from Lt Gen Gordon Blake USAF to United States Intelligence Board
 REL2_CAROL_HUGHES_OCT_21.PDFMemorandum from Lt Gen Joseph Carroll USAF to Thomas L. Hughes
 REL2_BUNDY.PDFMemorandum from McGeorge Bundy to the President
 REL1_LATIMER.PDFMemorandum from Mr. Thomas K. Latimer to Mr. William G. Miller, Chief of Staff SSCI
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