WARNING TO PRESIDENT DIEM OF A POSSIBLE COUP D-ETAT ON NIGHT OF 1-2 AUGUST 1962

Created: 8/1/1962

OCR scan of the original document, errors are possible

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DATE OP INFO.

PLACES. DATE ACQ. APPRAISAl

CENTRAL INTR1IGENCE,

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REPORT NO.

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REFERENCES

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HEA2QUAR1ERS COMMENT. ALTBOUGH THE COUP D'ETAT DESCHIBED IN THIS REPORT DID HOT OCCUR ON THE MIGHTHIS REPORT IS BEING DISSEMINATED SINCE IT IS POSSIBLE THAT THE INDIVIDUALS INVOLVED MIGHTLANUTURE COUP AGAINST THE DIEM REGIME. SEE 1 IN PARAS.

2 LIEUTENANT COLONEL NGUYEN VAN CHAU, CHIEF OF THE ARMY. OF THE REPUBLIC OF VIETNAM (ARVN) PSYCHOLOGICAL WARFARE SERVICE, STATED AT0 HOURS THAT HE HAD BEEN INFORMED THAT PRESIDENT NGO DINH DIEM HAD BEEN WARNED OF THE POSSIBILITYOUP D'ETAT OCCURING ON THE CHAU DID NOT NAME THE INDIVIDUAL FROM

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3. CHAD ADDED THAT TEE COUP WAS ALLEGEDLY BEING PLANNEDROUP OP SENIOR ARTS OFFICERS LED BY ARVK CHIEF OF FIELD COMMAND MAJOR GENERAL DUONG VAN KDSa. CHAD ALSO STATED THAT HE BELIEVED THAT "rIQADIKR OENERAL MAI HLTJ XUAN, CHIEF OF THE QJJANO TR'JNG TRAINING CENTER, MIGHT ALSO BE INVOLVED. CHAU INDICATED THAT XUAN'S INVOLVEMENT WAS INFERENTIAL AND NOT EXPLICIT.

k. CHAU COMMENTED WITHOUT FURTHER EXPLANATION THAT THE FRENCH MIGHT ALSO BE INVOLVED. CHAU CONJECTURED THAT NOT MORE THAN TWO ARVN BATTALIONS WERE INVOLVED. BE DID NOT EXPLAIN TEE BASIS OF BIS CONJECTURE.

5. AT0 HOURSUGUST, MAJOR LONG, CHIEF OFREGION MILITARY SECURITY SERVICE (MSS) STATEDENTRALOFFICER OF THE GIA DINH PROVINCIAL GOVERNMENT HADIIETNAMESE COWUNTST (VC) RADIO MESSAGE IN PLAIN TEXTTHE VC SAIOON/CHOLON ZONE COMMITTEE IJiBTRUCTIBC ALL VC MILITARY TJiTTS ^JOFOR AN UPRISING AT MIDNIGHTUGUST.COMMENT. MAJOR

LONG DID NOT IDENTIFY THE ORIGINATOR OF THE MESSAGE.) (HEADQUARTERS COMMENT.

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[REPORTED THAT ON2 THE VC IN THE SAIGON AREA WERE

ORDERED TO CEASE ALL TERRORIST ACTIVITIES AND TO PREPAREOSSIBLE COUP

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6. MAJOR LONG ADDED THAT GENERAL XUAN HAD INFORMED THE VIETNAMESE GOVERNMENT ON2 THAT HIS INTELLIGENCE SECTION HADC DOCUMENT INSTRUCTING VC PERSONNEL TO BE READY FOR AN UPRISING IN ABOUT ONE

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MAJOP LONG DID NOT KNOW THE QRIGINATCR OR THE ADDRESSEE

OF THE DJTSRCEPTBD DOCUMENT, NOR DTD BE STATE TO WHICH VIETNAMESE GOVERNMENT AGENCY GENERAL KUAN BAD REPORTED.)

LONG ALSO REVEALED THAT AN MSS AGENT PENETRATION OF THE VC 07

UNTESTED RELIABILITY HAD REPORTEDUGUST THAT HIS VC SUPERIOR IN CHAU RTEP

t THIRTY KILOMETERS WEST OF SAIGON) HAD INSTRUCTED HTM ONULY TO BE ALERT

OUP. AND TO MEET HIS VC SUPERIOR IN SAIGON FOUR HOURS AFTER THE COUP

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MAJOR LONG ALSO STATEDAND GRENADE HAD EXPLODED IN THE GO VAP AREA OF SAIGON ON THE NIGHTUGUST INJURING SEVEN VIETNAMESE WOMEN AND CHILDREN. THE RELEVANCE OF THE EXPLOSIONOUP ATTEMPT IS NOT ClilAR, BUT MAJOR LONG BELIEVED THAT THE EVENTS MIGHT BE CONNECTED.)

THE PRESIJIHTIAL SECURITY SERVICE (SEPES) INTERCEPTED CODED RADIO MESSAGESUGUST ON UNUSUAL FREQUENCIES. THE TEXT OF THE MESSAGES WHEN DECODED WERE IN VIETNAMESE AND FRENCH, AND STATEDOUP WOULD OCCUR ON THE NIGHTUGUST. ARVN UNITS HAVE BEEN ALERTED IN THE SAIGON AREA.

WHO HAS PREVIOUSLY STATED THAT OF ALL THE ARVN OFFICERS, GENERAL DUONG VAN MINH

WAS THE MOST LIKELY TOOUP ATTEMPT. GENERAL MINH HASOCAL CRITIC

. OF THE DIEM REGIME INSOFAR AS DIEM'S EFFICACY AGAINST THE VC IS CCiiTXRNKD.

GENERAL MAI HUU XUAN, FREQUENTLY RUMORED TOEMBER OF VARIOUS COUPCOWTICU

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KNOWN TO HAVE BEEN DISSATISFIED WITHRESENT ASSIGNMENT AND TO HAVE HARBORED RESENTWlfTS AGAINST DIEM FOR ALLEGED SLIGHTS, DESPITE TBE FACT THAT DXEM PROMOTED HTM FROM COLONEL TO BRIGADIER GENERAL SEVERAL YEARS AGO. MAJOR LONG HAS EXHIBITED PROFESSIONAL COMPETENCE IN HIS PRESENT POSITION.

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ORGANIZATION (CIO) WAS UNAWARE OF ANY POSSIBLE COUP SHORTLY AFTER MIDNIGHTUGUST. HOWEVER, AT APPROXIMATELY THE SAME TIME, TBE NORMAL PRESIDENTIAL GUARD HAD AUIEADY BEEN REINFORCED AND POLICE CHECK POINTS ALSO SEEMED TO HAVE BEEN REINFORCED. GIVEN THE ADVANCE ALERT BY THE QVN MILITARY AND SECURITY BLEMENTS, IT IS PROBABLE THAT ANY INTENDED COUP WOULD BE ABORTIVE.

AToRoUGUST, SAIGON WAS QUIET AND THERE WERE NO SIGNS APPARENT OF ANY COUP ATTEMPT, EXCEPT FOR THE ALERT OF SOME OF THE GVN ELEMENTS STATED IN

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IN PARA. FIVE IS NOT COHVIKCING, AND RAISES THE POSSIBILITY THAT THE VC MIGHT BE ENGAGEDONFUSION MANEUVER. SEPES CAPABILITY TO INTERCEPT ANDESSAGE IN THE SAME DAY, AS REPORTED LN PARA. NINE, IS QUESTION. FIELD DISSEM. STATE CINCPAC ARPAC PACAF PAFLT-

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