DOCID: 4123774 (b) (3)-P.L. 86-36 . ., JUDE Document 2 of I for CUST )00( DOCN ff~ ..... ················ DE DE -PPER (4 LID DR BADLY FORMATTED DATA IN "DE" PARAGRAPH. ZNY 79C 2222211 ZKZK PP RNI DE P f9212IZ FM FM DIRNSA . TO TO OSCAR/UNIFORM TANGO

ZEM CLAS T a p 5 ! e R E T TRINE SECTION ONE XXMM XXMMENPll-Ta.1.i.181 SERI•SERIAL: 3/0"'1...___1Rl9l-68

NATIONAL SECURITY AGENCY SOUTHEEST ASIA SIGINT SUMMARY TEXT XXCC THIS REPORT SUMMARIZES DEVELOPMENTS NOTED THROUGHOUT

SOUTHEAST ASIA AVAILABLE TD NSA AT TIME DF PUBLICATION ON 19 AUGUST 1968. ALL INFORMATION IN THIS REPORT IS BASED ENTIRELY ON SIGINT EXCEPT WHERE OTHERWISE SPECIFICALLY INDICATED. SITUATION SUMMARY BRISK ACTIVITY PREVAILS IN VIETNAMESE COMMUNIST COMMUNICATIONS THROUGHOUT SOUTH VIETNAM. APPARENT CONCERN WITH DR REACTION· TD ALLIED MANEUVERS HAS APPEARED IN WIDELY SCATTERED PARTS OF THE COUNTRY. COINCIDENTAL WITH THESE REFLECTIONS. RECONNAISSANCE AND INCREASED ATTACK PREPARATIONS CONTINUE IN SEVERAL AREAS. NVA COMMUNICATIONS CONTINUE TD . REFLECT RECONNAISSANCE AND SUPPLY ACTIVITY IN THE SARAVANE AREA OF LADS. WHERE ROYAL LAOTIAN ARMY SOURCES BELIEVE AN ATTACK HILL BE MADE SHORTLY. IN ADDITION, ALONG THE SOUTH VIETNAMESE- CAMBODIAN BORDER A CAMBODIAN MILITARY WATCH HAS DISCOVERED A RNEH SECRET TRAILn. -I. SOUTH VIETNAM A. COMMUNIST ACTIVITY 1. DMZ AREA ELEMENTS OF THE NVA 321TH DIVISION CONTINUE TD REPOSITION IN THE CENTRAL DMZ. THE HQ, UNIDENTIFIED REGIMENT <M0944, PREVIOUSLY LABELLED ALFA> OF THE DIVISION WAS LOCATED ON 8 AUGUST APPROXIMATELY 4 KM NORTHWEST OF CAMP CARROLL. NEAR 16-47N 11'6-54E <YD 144582>. THIS REGIMENT WAS LOCATED APPROXIMETELY 31 KM NORTH OF KHE SANH ON 2 AUGUST. ANOTHER UNIDENTIFIED REGIMENT <MD937, PREVIOUSLY LABELLED BRAVO> OF THE DIVISION WAS LOCATED ON 7 AUGUST NEAR 16-SSN ll5-58E <YD fl6725>, IN THE SAME GENERAL AREA OF ITS l AUGUST LOCATION 11 KM WEST-NORTHWEST OF CON THIEN. THE STATUS OF THE HQ. 321TH DIVISION REMAINS UNCERTAIN. ON 9 AUGUST, THE DIVISION HEADQUARTERS WAS EGAIN LOCATED APPROXIMATELY 12 KM NORTHWEST OF CAMP CARROLL. NEER 16-SlN ll6-47E <XD 919654). IN THE GENERAL VICINITY OF ITS 4 AUGUST LOCATION. A S AUGUST LOCATION ON THE HEADQUARTERS. HOWEVER, HAD PLACED IT NORTH OF THE DMZ. NEAR 17-lfN Ul6-41E CXD 916833). ON 8 AUGUST. UNIDENTIFIED NVA ARTILLERY ASSOCIATED ELEMENTS IN THE EASTERN DMZ MENTIONED AN UNIDENTIFIED POSSIBLE UNIT ng7n AND THE •REAR AREA OF 87.• PREVIOUS REFERENCES TO AN n17n WERE NOTED IN DECEMBER 1967 HHEN AN ELEMENT OF THE NVA 27TH BATTALION REPORTED THAT A DETACHMENT OF THE 87TH REGIMENT (E87> WAS TRANSPORTING RICE FOR THE 6TH COMPANY. 27TH BATTALION. THIS I AUGUST REFERENCE TD •g7n MAY INDICATE THAT ELEMENTS QF AN·NVA 87TH REGIMENT ARE LOCATED IN THE GENERAL DMZ AREA. IN OTHER ACTIVITY OF I AUGUST. AN NVA ARTILLERY ASSOCIATED ELEMENT CM1161> REPORTED DETAILED GRID COORDINATES FOR TWO UNIDENTIFIED POSITIONS IN THE DONG HA AREA. IN THE WESTERN DMZ. AN UNIDENTIFIED SUBORDINATE <M2658) OF HQ. KHE SANH AREA FRONT <KSAFl WAS LOCATED ON I AUGUST APPROXIMATELY 37 KM WEST OF KHE SANH. NEAR 16-42N lf6-23E CXD 484471>. THIS ENTITY FIRST APPEARED IN CDMMUNICETIDNS WITH HQ. KSEF ON 1 AUGUST. IT IS CURRENTLY USING THE SAME TYPE OF MODIFIED SIGNAL PLAN AS THAT EMPLOYED BY THE MEJOR NVA HEADQUARTERS IN THE KHE SANH AREA AND THE UNIDENTIFIED CONTROL AUTHORITY CMD973> SUBORDINATE TD HQ. KSEF. IN ADDITION. THE SIGNAL PLAN EMPLOYED BY THIS ENTITY <M2658) IS THE ONE WHICH THE POSSIBLE HQ. NVA 29TH REGIMENT USED WHILE O~NG ~~8I~f8~Hf9~a:~,.A~iCiN~~~AAJ'¥~/R89s-6a. aa1141z./,3/ Rl89-6a. NNNN

===EDD=== ===EDD=== (b) (1) (b) (3)-50 USC 403 (b) (3)-18 USC 798 (b) (3)-P.L. 86-36

@'pproved for release by NSA on 06-05-2014, Transparency Case# 6588a

(b) ( 1 )

(b) q~GlP ~~~~~~71f (b) ,-, -- - - - -- • • • • • • •• • • • (b) (3) - P .L. 86 - 36 (b) (3) -P. L. 86-36

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.JonE Document 6 of a forcusr · I(;~

!~:f!9wJ~K·~N.fO~~AiTjMm IN "DE" PARAGRAPH. FM FMDIRNSA TO TD OSCAR/UNIFORM TANGO

ZEM . · .. CLAS T D r S ' E e R E T TRINE SECTION THO XXMM XXMMENPJ2~rca SERIJESERIAL1 3/0 Rl91-61

NATIONAL S TY AGENCY SOUTHEEST ASIA SIGINT SUMMARY TEXT XXCC 2. MILITARY REGION TRI-THIEN-HUE ON I AUGUST, AN UNUSUALLY

HIGH VOLUME OF MESSEGES HAS EXCHANGED BETWEEN HQ, MILITARY REGION CMR> TRI-THIEN-HUE CTTH> AND ITS FORWARD ELEMENT. THE FORWARD ELEMENT SENT Z4 MESSAGES TO, AND RECEIVED 11 MESSAGES FROM, HQ, MR TTH. THE AVERAGE MESSAGE VOLUME NOTED BETWEEN THESE ENTITIES IN AUGUST HAS BEEN THO PER DAY, ALTHOUGH HIGHER MESSAGE ECTIVITY WAS NOTED IN LATE JULY. THIS INCREESE MAY BE RELATED TD ALLIED OPERATIONS IN PROGRESS NEAR THE A SHAU VALLEY, OR COULD BE ASSOCIATED WITH THE RECENT RELOCATION OF THE FORWARD ELEMENT TO AN AREA 15 KM EAST OF THE LAOS-SOUTH VIETNEM BORDER. ON 8 AUGUST, THE FORWARD ELEMENT WAS LOCATED IN THAT VICINITY, NEAR 16-27N U7-83E CYD 161193), APPROXIMETELY 11 KM NORTHHEST OF ITS LOCATION ON THE PREVIOUS DAY. SINCE MID-JULY THE NVA ll3RD REGIMENT HAS BEEN ENGAGED IN VARIOUS ACTIVITIES WHICH SUGGEST THE ESTABLISHMENT OF A BASE AREA APPROXIMETELY 35 KM HEST OF HUE. THE lST AND 3RD BATTALIONS, AND SEVERAL SUPPORT COMPANIES OF THE REGIMENT, HAVE BEEN TRANSPORTING SUPPLIES, CONSTRUCTING A ROAD, AND MOVING RECRUITS IN NORTHWESTERN THUA THIEN PROVINCE, NEAR 16-29N 187-llE CYD 3425). REFERENCES HAVE ALSO BEEN NOTED IN REGIMENTAL COMMUNICETIONS TO COORDINETION WITH STAFF ELEMENTS OF THE HQ, MR TTH. IN ADDITION, UNITS DESIGNATED •K13•-- POSSIBLY THE 813TH SIGNAL BATTALION, REPORTED IN COLLATERAL AS SUBORDINATE TD THE HQ. MR nH--AND •14B• HAVE BEEN ENGAGED IN ACTIVITIES WITH ELEMENTS OF THE 813RD .REGIMENT. MESSAGES HAVE ELSO INDICATED THAT THE POSSIBLE BASE EREA IS LDCETED NEAR HILL 935 Cl6-27N 117-llE, YD 342195). ALTHOUGH MOST OF THE 883RD REGIMENT APPEARS TO HAVE BEEN PARTICIPETINO IN THIS ACTIVITY, ELEMENTS OF THE 2ND COMPANY, 2ND BATTALION, HAVE RECENTLY BEEN RECONNOITERING AREAS AS FAR EAST AS HIGH POINT 416 (16-26N 1•7-2.E. YD 4121>. APPROXIMETELY 25 KM WEST OF HUE. C2/Gll/VCM/R897-68, 882135Z> ESEERET SAVIN) 3. MILITARY REGION S IN QUANG NAM PROVINCE. HQ, MR 5 PROVINCIAL UNIT CONTROL HAS LOCATED NEAR 15-43N ll7-39E CYC 141382> ON 8 AUGUST, 14 KM NORTH OF THIS UNIT.S LOCATION ON THE PREVIOUS DAY. HQ, NVA 2ND DIVISION FORWARD ELEMENT 1 WAS LOCATED ON 1 AUGUST IN SOUTHERN QUANG TIN NEAR 15-llN lll-21E CBS 149911>, I KM SOUTHEAST OF ITS 3 AUGUST LOCATION. ON 8 AUGUST ONE OF THE THO 2ND DIVISION FORHARD ELEMENTS REPORTED THAT IT WAS ABOUT TO MOVE. FORHARD ELEMENT 2 HAS LOCATED ON 3 AUGUST NEAR 15-28N lll-19E CBT 124117>. IN CENTRAL QUANG NGAI PROVINCE THE SUSPECTED VC 31TH LOCAL FORCE BATTALION, LOCATED ON 31 JULY NEAR 15-l5N lf8-41E CBS 511685), INDICATED ON 1 AUGUST THET IT WAS SURROUNDED. ON I AUGUST THE HQ, NVA 3RD DIVISION INFORMED ITS REAR BASE AREA THAT IT HAS AIOVE TO MOVE, PROBABLY FROM ITS 6 AUGUST POSITION NEAR 14-59N ll8-33E CBS 366575). TD THE SOUTH, IN CENTRAL PHU YEN PROVINCE, AN ESSOCIATE CMl33ll OF THE VIETNAMESE COMMUNIST SOUTHERN SUBREGION <SSR> HAS LOCETED NEAR 13-16N ll9-l9E CCQ 112662> ON 1 AUGUST. THIS IS APPRDXIMETELY 21 KM SOUTH-SOUTHEAST OF THIS UNIT.S 3 AUGUST LOCATION. COMMUNICATIONS BETHEEN . THE CAM RANH MUNICIPAL UNIT CMU> AND THE KHANH HOA PROVINCIAL UNIT HAVE BEEN ISOLETED IN SIGINT. THE CAM RANH MU, LOCATED NEAR 12-IJN 1J8-58E <BP 789269) ON 27 JULY, HAS COMMUNICATED WITH THIS PROVI.NCIAL UNIT SINCE AT LEAST 5 JULY. XXHH 988

NNNN

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(b)q~G~P ~~~~~~14 • (b) ,-, -- -~- -- - • • • • • • • • (b) (3)-P.L. 86-36

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••• Document 3 of 8 for CUST ••• J)OCN .. ,~~2~:: ~~ER f~1AtiJ> DR BADLY FORMATTED DATA IN "DE" PARAGRAPH. ZNY 88C 2222218 ZKZK PP RNI DE P 892128Z FM FM DIRNSA TO TO O.SCAIVUNIFORM TANGO

ZEM CLAS T a r 3 f e " E 'f 'fRINE SECTION THREE XXMM XXMMENPl3~Ta8 SERI•SERIAL1 3/~ Rl91-61

NATIONAL S TY AGENCY SOUTHEEST ASIA SIGINT SUMMARY TEXT XXCC IN THE WESTERN HIGHLENDS, WESTERN KDNTUM PROVINCE,

A VIETNAMESE COMMUNIST eve> ENCOUNTER WITH ALLIED TROOPS HAS NOTED IN AN 8 AUGUST REPORT FROM A SUIORDINETE CI8185) TO E MILITARY INTELLIGENCE CMI> AUTHORITY Cil114) ASSOCIATED WITH THE NVA B3 FRONT. THE SUBORDINATE REPORTED THAT A RICE TRANSPORT ELEMENT HAD ENCOUNTERED ALLIED FORCES AND HED KILLED THREE HHILE SUSTAINING ONE CASUALTY. THE SUBORDINATE REQUESTED ADDITIONAL RICE END MEDICAL ASSISTANCE FOR THE WOUNDED MAN. LATER ON THE SAME DAY THE MI AUTHORITY REPRIMANDED THE SUBORDINATE FOR FAILURE TO MAKE TIMELY REPORTS, CITING AS AN EXAMPLE A 26 JULY VC ROCKET ATTACK ON TAN CANH AIRFIELD Cl2-39N 187-SIE, ZB 8422>. ACCORDING TO THE AUTHORITY, THE SUBORDINATE. DID NOT REPORT FOR A NUMBER OF DAYS THEREEFTER. THE SUBORDINATE WAS INSTRUCTED TO MAKE SPECIFIC REPORTS CONCERNING ALLIED STRENGTH, LOCATION, AND DIRECTION OF MOVEMENT, AND TO MAKE IMMEDIATE REPORTS OF THE RESULTS OF ARTILLERY ATTACKS. THE MI AUTHORITY HAS LOCATED ON I AUGUST, NEAR 14-36N ll7-33E 9YB 751162) IN THE WESTERN PORTION OF THE PROVINCE. THE SUBORDINATE HAS LOCATED ON 1 AUGUST NEAR 14-37N· ll7-57E CZB 116175) IN THE SAME AREA. IN THE CAMBODIA-DARLAC PROVINCE AREA, A PREDICTION OF A POSSIBLE ALLIED SWEEP OPERATION HAS NOTED IN A MESSAGE OF 8 AUGUST TO THE POSSIBLE MILITARY INTELLIGENCE SECTION CMIS>, NVA lST DIVISION FROM E SUBORDINETE Cil164). THE SUBORDINATE REPORTED THAT, ON 7 AUGUST, ALLIED AIRCREFT FIRED 21-MM SHELLS NEAR ITS POSITION, THET THERE HAS ALLIED AIRCRAFT ACTIVITY NORTHWEST AND NORTHEAST OF ITS POSITION END PREDICED THAT "THE ENEMY COULD POSSIBLY SWEEP TD THE NORTH AND NORTHEEST." THE SUBORDINATE WAS LOCATED ON 8 AUGUST IN WESTERN DARLAC NEAR 12-45N ll7-45E CYV 978299> AND THE MIS ON 1 AUGUST HAS IN CAMBODIA NEAR 13-12N lf7-28E CYV 671619>. ALSO IN DARLAC PROVINCE, AN UNIDENTIFIED ASSOCIATE CM1622> OF THE B3 FRONT HAS LOCATED ON I AUGUST NEAR 12-56N ll8-l3E CAQ 813317), 31 KM NORTH OF BAN ME THUDT AND 38 KM SOUTHEAST OF THIS UNIT.S POSITION ON 27 JULY. C2/Gl2/VCM/Rl993-61, l81435Z. Rl991-68, l81325Z. Rl998-68, l81215Z. Rl985-61, l81345Z. Rl983-68, 17195JZ. Rl982-68, 171948Z. Rl981-68, 171125Z. Tl937-68, l81915Z. Tl939-68, llllllZ. Tl94l-61, l819ISZ> ESEeREi SAVIN> 4. NAM BO SUBREGIONS IN EN I AUGUST MESSAGE TO THE MILITARY INTELLIGENCE SECTION CHIS), SUBREGION CSR>· S, THE MIS, SR 5 CONTINUED TO REPORT ON A PROBABLE SOUTH VIETNEMESE MARINE TROOP DEPLOYMENT IN AREAS NORTH AND NORTHEEST OF SAIGON. THE MIS, SR 4 REPORTED THAT DURING AN UNDETERMINED PERIOD OF TIME IN AUGUST THE VARIOUS BATTALIONS OF THE VIETNAMESE "MARINE BATTLE GROUP &• HERE DEPLOYED AS FOLLOWS THE lST BATTALION AT THE BINH LOI BRIDGE Cll-SIN ll6-43E, XS 872969). THE 2ND BATTALION AT THE XA LO BRIDGE Cll-47N ll6-42E, XS 163933> AND IN THE AREA OF THI NGHE Cll-47N ll6-43E, XS 178931). THE 3RD BATTALION AT THE BANG KY BRIDGE CUNLOCATED> AND HEST OF BINH HOA Cll-48N 116-'ilE, XS 8495>. AND THE 4TH BATTALION AT GIONG ONG TO Cll-47N ll6-45E, XS 911921> AND BINH TRUNG Cll-47N 116-46E, XS 931921>. THE MIS, SR 4 HAS BEEN NOTED REPORTING ON ALLIED TROOP DEPLOYMENT IN THE SAIGON AREA SINCE 16 JUNE. THE MIS HAS LOCATED ON 31 JULY ll-46N ll7-l4E CYS 278911> ANn THE MIS, SR S ON 8 AUGUST NEAR ll-13N lf6-47E CXT 936411>. XXHH 9aa NNNN

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• • • • (3)-P.L. 86-36

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(b)i;)~G~P ~~~ ~~'714 • (b) ,--,, -- -~- -- - • • •• • • • ••• • ( b ) ( 3 ).- P . L . 8 6 - 3 6

••• Document 7 of a for CUST •••

~~~: fl~Ll:D DR BADLY FoR14ATi ED DATA IN •DE" PARAGRAPH. ZNY 45D 2222211 ZKZK PP RNI DE P l9212IZ FM FM.DIRNSA TO TD OSCAR/UNIFORM TANGO

ZEM CLAS.Tap s·E e KE 1' 'fHNE SECTION FOUR XXMM XXMMENPl4.;;..T.UW8 SERI•SERIAL a 3/0c:::Jl'Rl91-68

NATIONAL SECURITY AGENCY SOUTHEEST ASIA SIGINT SUMMARY TEXT XXCC.TO THE NORTHWEST, ORDERS TD CEASE COMMUNICETIDNS WERE

SENT FROM THE MILITARY INTELLIGENCE CMI> ELEMENT SERVING HQ, PROBABLE VIETNAMESE COMMUNIST 9'TH ARTILLERY REGIMENT TD TWO SUBORDINATES ON a AND 9 AUGUST. ON a AUGUST, ONE SUBORDINATE Cil134l HAS INSTRUCTED TD COMMUNICATE WITH BOTH THE CONTROL. EUTHDRITY AND E SECOND SUBORDINATE Clfl35) ON THE FOLLOWING DAY AND THEN NOT TO COMMUNICATE FURTHER. ON 9 AUGUST, THE.SECOND SUBORDINATE <Ifl35) HAS TOLD TO BREAK OFF COMMUNICEllONS HITH THE FIRST AND TD •TEMPORARILY CEASE CDMMUNICATIDNS11 NITH THE CONTROL EUTHDRITY. THE AUTHORITY STATED THET IT HDULD INFORM THE SECOND SUBORDINATE AT A ~aIE~o~~D~I~~f~o~l:~~~wUNc¥~~u~~~Al5Bft~ftl=iTi~s~~~c~n=s SENT TD THE FIRST SUBORDINATE ON 4 AUGUST WITH ORDERS FDR

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THE THO TD COMMUNICATl!:.DN 6 AUGUST. ON 7 AUGUST, THESE SUBORDINATES WERE NOTED COMMUNICATING LATERALLY. ON a AUGUST, THE SECOND SUBORDINATE HAS LOCATED NEAR ll-33N ll6-13E CXT 339761> IN NORTH-CENTRAL TAY NINH PROVINCE. THIS LOCATION IS 21

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KM NORTHWEST OF THE SUBORDINATE.S 5 AUGUST LOCATION. C2/Gll/VCMl'Tl577-68, 111319Z) (5EeRET SAWIN) 5. SUBREGION 3 BY a AUGUST THE TENTATIVELY IDENTIFIED SUBREGION 3 COMMITTEE CSRC-3> HAD RELOCATED TD .

•

U-27N U6-32E CXS 675563), IN THE SRC-3 BASE EREA, APPRDXIMETELY 21 KM SOUTH OF ITS 2 AUGUST LDCAT.lJllL. SRC-3 HAS LAST LOCATED IN ITS BASE AREA ON 29 JULY. C3/011.........YR187-6U C5E6RET SAVIN> 6. MILITARY REGION 2 ON a AUGUST AT l636Z THE MY THO PROVINCIAL COMMITTEE CPC> WAS LDCETED AT ll-24N ll5-55E CWS 999482) IN WESTERN DINH TUONG PROVINCE IN TRANSMITTING AREA 1. AT l159Z IT WAS LOCATED EPPRDXIMATELY 11 KM TD THE NORTH AT · ll-28N ll5-56E CXS 113566). THE MY THO PROVINCIAL BRANCH . CPB> OF THE LIBERATION NEWS AGENCY, NORMALLY COLDCETED WITH THE MY THO PC, AT l732Z HAS LOCATED 2f KM NORTH OF TRANSMITTING AREA 1 AT ll-34N ll5-54E CHS 995673) IN EASTERN KIEN TUONG PROVINCE. ON 7 AUGUST, THE MY THO PC AND PB WERE BOTH LOCATED IN TRANSMITTING AREA 1. SINCE 21 FEBRUARY THE MY THO PC AND PB HAVE BEEN OBSERVED USING THREE SEPARATE TRENSMITTING AREAS IN WESTERN DINH TUONG PROVINCE. THESE CURRENT LOCETIDNS ARE THE FARTHEST NORTH THET THE MY THO PC AND PB HAVE EVER BEEN LOCA"rED. C21'01'VCYl'R51-68> Uli~REl' SAVIN> 7. COSVN ON a AUGUST TWO MILITARY AFFAIRS SECTION CMAS> CDSVN TERMINALS, WHICH COMMUNICATE TD NAM BO SUBREGION HEADQUARTERS, HERE LOCATED IN THE TAY NINH-BINH LONG PROVINCE BORDER AREA NEAR ll-28N ll6-3IE CXT 624941), APPROXIMATELY 36 KM EAST OF THEIR POSITIONS IN LATE JULY. ON THE SAME DATE ANOTHER MAS COSVN TERMINAL, WHICH COMMUNICATES WITH THE POSSIBLE HQ, VC 274TH REGIMENT, WAS LOCATED IN THE NORTHERN TAY NINH-CAMBODIE BORDER EREA NEER ll-47N 116-llE cxu 295139), APPRDXIMcrELY 12 KM NORTHWEST OF ITS 29 JULY POSITION. CONTACT BETWEEN MAS CDSVN AND THE POSSIBLE HQ, VC 274TH REGIMENT HAS SUCCESSFUL ON ONE OCCASION ON THIS DATE. HDHEVER, THIS REGIMENT CONTINUES TD MEINTAIN COMMUNICATION SILENCE WITH ITS POSSIBLE TACTICAL COMMAND ELEMENT. XXHH 911 NNNN

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(b) q~G~P ~~~ ~~'114 • (bl,-, -- -~- ·--· • • • • • • • • • • (b)\3)-P.L. 86-36

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••• Document 4 of a for CUST •••

!~~:H~LII> DR BADLYF~RMATTED DATA IN "DE" PARAGRAPH. ZNY llC 2222211 ZKZK PP RNI DE P 19212IZ FM FM.DIRNSA TD T.D OSCAR/UNIFORM TANGO

ZEM CLAS Te•. 3 E.e RE T TRIN! SECTION FIVE XXMM XXMMENPl5~TB.l!.li58 SERUSERIAL• J.10.IL....YR191-68

NATIONAL SECURITY AGENCY SDUTHEEST ASIA SIGINT SUMMARY TEXT XXCC CONCURRENT WITH THE RELDCETIDNS DF THESE MAS CDSVN

TERMINELS, THE HIGHEST MESSAGE VOLUME SINCE 23 JULY HAS OBSERVED ON THE MAS COSVN COLLECTIVE FACILITY SERVING THE MILITARY REGION HEADQUARTERS. ADDITIONALLY, ON 8 AUGUST MAS COSVN EXCHANGED A HIGH VOLUME OF MESSAGES WITH THE POSSIBLE HQ, NVA 7TH DIVISION. ALTHOUGH THE VOLUME EXCHANGED ON I AUGUST WAS THE LERGEST SINCE 11 JULY, HIGH VOLUMES HERE ALSO EXCHANGED BY MAS C~AND THIS DIVISION HEADQUARTERS ON 2 AND 3 AUGUST. (3.10 Rl19-61. Rll6-61. 2.1Gll.1VCM.IR491-61, 191635Z. R49f-68, 181313 '5EeRET SAVIN> II. NORTH VIETNAM A. INFIL TRETIDN ACTIVITY DURING THE FIRST SEVEN DAYS OF AUGUST, COMMUNICATIONS ACTIVITY ON THE SUSPECTED HQ, BINH TRAM <BT> 7 COMPLEX HAVE BEEN SLIGHTLY BELOW NORMAL. THIS INCLUDES BOTH A DECREESE IN THE NUMBER DF COMMUNICATIONS SCHEDULES END THE NUMBER DF SUBORDINATES WITH WHICH THE HEADQUARTERS COMMUNICATES. THE SUSPECTED HQ, BT 7 HAS LOCATED ON 3l'JULY APPROXIMETELY 8 KM SOUTHWEST OF A LUOI, NEAR 16-16N 117-f6E eve 273993). THE UNUSUELLY HIGH MESSAGE ACTIVITY OBSERVED IN JULY ON THE PROBABLE HQ, 559TH TRANSPORTATION GROUP BROEDCAST FACILITY HAS CONTINUED THROUGH THE FIRST EIGHT DAYS DF AUGUST. A TOTAL OF 237 MESSAGES HAVE BEEN SENT VIE THIS FACILITY SINCE l JULY. 55 DF THESE HAVE BEEN OBSERVED IN AUGUST, REPRESENTING APPROXIMATELY THE SEME DAILY AVEREGE AS IN JULY. C2.1Gll.1VCM.IRl96-6&, IBl235Z> ESEeRET 3EVIN> THE TOTAL OF NEW INFILTRATION GROUPS FDR AUGUST REMAINS AT FIVE. STRENGTHS AVAILEBLE FOR FOUR OF THESE GROUPS INDICATE E MINIMUM OF 2,143 MEN. A 29 JULY REAR SERVICES MESSAGE PROVIDED THE INITIAL SIGINT OBSERVANCE DF WDRKCAMP 14. THE MESSAGE REPORTED THAT 2791 AND 2591 SICK AND WOUNDED PERSONNEL HAD BEEN PROCESSED THROUGH HORKCAMPS 12 <POSSIBLY LOCATED IN THE VICINITY O.F NAM DAN, 18-43N 115-lfE, WF 5367> AND 14 CUNLOCATED>, RESPECTIVELY, DURING THE PREVIOUS SEVEN MONTHS. THE BULK OF THOSE PERSONNEL NOTED PASSING THROUGH HORKCAMP 12 ARE PROBABLY THE SAME AS THOSE NOTED PESSING THROUGH WORKCAMP 14. THE NORTHWARD MOVEMENT OF SICK END HOUNDED PERSONNEL HES BEEN NOTED FROM T-15 TD T-13 VIA T-14 CALL IN LAOS>. AFTER ENTERING NORTH VIETNEM THESE PERSONNEL ARE EPPARENTLY MOVED THROUGH A SERIES OF WORKCAMPS, RATHER THAN COMMO- LIEISDN STATIONS. E5E6RET SAVIN> B. NAVAL FORCES BETWEEN ll48Z AND 1611Z\ON 8 AUGUST, THE NORTH VIETNEMESE NAVAL CNVNN> RADAR STATION ON CAC IA ISLAND CZl-43N 117-14E, YH 135913) TRACKED THREE SMALL •FRIENDLY" COMBAT VESSELS IN THE GULF OF TONKIN APPROXIMATELY ONE MILE SOUTH OF CAC BA ISLAND. THESE VESSELS WERE OBSERVED IN THE AREAS OF 2'-38-31N 117-19-llE CXH 2482), IN THE VICINITY OF LONG CHAU ISLAND END Zl-47-3' 117-12-HE <YH 1296>, IN PROXIMITY TO THE RADAR STATION. THE ABOVE ACTIVITY IS POSSIBLY RELATED TO THE APPEARANCE OF THREE NEW UNIDENTIFIED VESSELS IN THE NORTHERN FLEET COMMEND GROUP DURING EARLY AUGUST. AS PREVIOUSLY REPORTED, RECENT NVNN COMMUNICATIONS HAVE.REFLECTED THE MOVEMENTS OF AT LEAST TWO OF THESE VESSELS . ..IK.J:AC BA ISLAND AREA. C2.1Ql.1VCN.1Rl276-68, l9f22fZ. 3.IO~Rl87-68> ESEeReF 3AVIN> C. AIR.IAIR DEFENSE FORCES NVAF COMMUNICATIONS REFER TO DOWNED U.S. PILOT ON 9 AUGUST, SIGINT REFLECTED AN UNIDENTIFIED SPEAKER ON AN UNIDENTIFIED NVAF COMMUNICATIONS FACILITY REPORTING THAT A U.S. TACTICAL AIRCRAFT WAS DOWN AND THET THE PILOT HAD PARACHUTED. THE UNIDENTIFIED SPEEKER STATED THAT A SEARCH HAS. BEING ORGANIZED TD CAPTURE THE PILOT. XXHH 9aa NNNN

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• • • • • •• • • • ••• Document 8 of 8 for CUST •••

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;:;Ali1> CJR BADLY FORMATTED DATA .. IN "DE" PARAGRAPH. ZNY 4,D 2222211 ZKZK PP RNI DE P l9212IZ FM FM .. DIRNSA TD TD OSCARl'UNIFDRM TANGO

ZEM

SERUSERIAL: 31'0 ··. Rl91-68 CLAS T. 9 P S>E.e RE T TltINI!: SECTION SIX XXMM XXMMENPl6-""T~8

NATIONAL S TY AGENCY SDUTHEEST ASIA SIGINT SUMMARY : TE>tf. XXCC COLLATERAL INFORMATION INDICATES THAT A U.S. AIR FORCE

. . . F-US WAS DONN DUE. TD UNKNOHN CAUSES IN THE VICINITY OF l7-12N 1J6-52E DURING THE SAME TIME PERIOD. C21'H31'VCAl'R298-68, 191549Z) UE:t;Rl!T SAVIN~ D. OTHER ACTIVITY NVN VIP.S EN ROUTE TD PARIS TAL.KS ON 9 AUGUST, SIGINT REFLECTED THE DEPARTURE OF A.NORTH VIETNAMESE AIR FORCE CNVAF> AN-24 FROM HANOI \\ 1~~: ::::I::~~D~FT::v:~p~:::o~~:;~:s;R~:s:::;R;o:;1hiE!g~

\\ \1.::::::;=::::::l'.:::::::;;:::;~;:;;;:NS llETHEEN THE NVA UTH BATTALION AND ITS SUBORDINATE 9TH COMPANY OPERATING IN THE SARAVANE U5-43N U6-26E, XC 5237> AREA OF. LADS HAVE CONTINUED TD REFLECT RECONNAISSANCE AND SUPPLY ECTIVITY IN RECENT HEEKS. IN A 6 AUGUST MESSAGE, COMPANY 9 REPORTED TD BATTALION 11 THAT THERE HERE 1171 KILDGREMS OF PROVISIONS AT THE LMANA STREAM C FL OHS FROM 15-57N 1'6-28E, XC 481641 SOUTHWEST T0.15-53N U6-16E, XC 355564). IT HAS FURTH.ER REPORTED THET ON .5 AUGUST, A GROUP DF "THE ENEMY" FROM THE REGION OF BAN PAXIAKOUNG Cl5-54N ll6-16E, XC 353577> AND EN UNLOCATED VILLEGE OF. TA NUA WENT TO BAN NADDNE KHOUNG U5-43N U6-2IE, XC 432372), AND THET THO MEN HAD GONE TO THE UNLDCATED VILLAGE DF KENG HANG TD REQUEST RICE. A LATER COMPANY \.9 MESSAGE OF THE ST DISCLOSED THET AN UNIDENTIFIED WEAPONS PLATOON HAD DELIVERED. H.EAPONS, BUT THE "FRIENDS" CPROBABLY THE PATHET LAD> HAD lOST ONE MORTAR TUBE. AMMUNITION

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FDR AN UNIDENTIFIED TYPE OF HEAPON HAS SEID TD BE ET "HEADQUAR'rERS11 • FINALLY, ON 7 AUGUST, THE BATTALIO.N ALSO REPORTED THAT THE 12-MM MORTAR SQUAD OF COMPANY 11 HE.D 41 ROUNDS OF EMMUNITION, AND THAT WHEN EDDITIONAL CHARGES HER.E RECEIVED THEY WOULD BE FORWARDED. TD THAT SQUAD. ROYAL LAOTIAN ARMY SOURCES BELIEVE THAT COMMUNIST FORCES WEST OF SARAVAN~ ERE PREPARING TO ETTACK THE TOWN SHORTLY AND HAVE REPOm· THAT NVA TROOPS ARE MASSING IN THE GENEREL AREA. (31'0 \. Rll9-61, 17212IZ. 21'01'VCMl'R416-61, 8214SSZ> ESE6AET SAV · .. PATHET LAO DELEGATION

1!!:!~!!:1::!::::~~,::1:fi::~::&::;:t~z:~:L::::rHED HAD BEEN ABLE TO MEET ET THE FESTIVAL REPDRTEDL RMED

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NO CASUELTIES WERE REPORTED IN EITHER ENCOUNTE • C2X/Q T21 -68, 1713f&Z. T214-61, fUUIZ> ESEERET SAVIN> L E T E I T M MILITARY REGION S VIETNAMESE COMMUNIST MILITARY UNITS BELIEVED TO HAVE BEEN SUBORDINATE TO THE HQ, NVA 33RD REGIMENT DURING THE PERIOD LATE JANUARY TO MID-MAY 19'8, IN tHE BAN ME THUOT AREA OF SOUTHERN DARLAC PROVINCE, HAVE REAPPEARED IN SIGINT. CURRENT ACTIVITY OF THESE UNITS, WHICH./ APPEAR TO INCLUDE AT LEEST THE 34TH, 39TH, AND 311ST BATTALIONS, STRONGLY SUGGESTS THET THEY ERE PREPARING FDR AN OFFENSIVE OPERATION IN THE QUANG DUC-DARLAC PROVINCE AREA. A MESSAGE OF 7 AUGUST ADDRESSED TD THE 34TH BATTALION REQUESTED THE RECIPIENT TD RELEY THE FOLLOWING IMMEDIATELY .•ON 9 AUGUST THE 75 CC-MIU> RECOILLESS RIFLE UNIT MUST BE. ET THE STIPULATED POSITION FOR THE TROOPS TO HAVE ONE DAY TO PREPARE." ANOTHER MESSEGE OF 1 AUGUST TRENSMITTED FROM THE SEME UNIDENTIFIED AUTHORITY STATED "ON 9 AUGUST, SEND. A 2-HATT ((RADIO)) ACROSS THE RIVER WITH K-39 CC39TH BATTALION>>. LUAN <<UNIDENTIFIED>> IS TD PREPARE A 15-DAY SUPPLY OF RICE FOR THE MEN." THE MESSAGE ALSO INDICATED THAT, WHILE MOVING, THE RECIPIENT HAS TO MEINTAIN COMMUNICATIONS. ANOTHER MESSAGE ON THE SAME DATE STATED "THE COMRADES ACTIVE ON THE NORTHERN FLANK WILL EAT ON THIS SIDE CCOF THE RIVER>>. THE RECRUITS WE DEPLOYED TO THE 311ST <<BATTALION>> HAVE ALREEDY LEFT FOR YOUR POSITION. TELL LAM ((LAM» THAT K.3'1 WENT UP TO MEET HIM AT LY .S «LYS. UNIDENTIFIED>> STATION TD GUIDE THEM ELL BACK TO H-5 <<POSSIBLE DISTRICT DESIGNETOR IN DARLAC PROVINCE>> TO MEET THE UNIT •.. " THOUGH THE EXACT LOCETION OF THE ELEMENTS INVOLVED IN THE ABOVE ACTIVITY HAS NOT BEEN DETERMINED, THEY ARE BELIEVED TD BE OPERATING IN THE QUANG DUC-DARLAC PROVINCE-CAMBODIE BORDER AREE. THESE UNITS WERE IN THIS GENEREL AREA WHEN LAST OBSERVED IN SIGINT DURING EARLY MAY. A MAJOR RIVER· SYSTEM IN THE AREA--THE IA KRONG--MAY BE THAT REFERENCE IN THE MESSAGES. ACCORDING TO COLLATERAL, A 31lST LOCAL FORCE BATTALION OPERATES INTHE DARLAC PROVINCE AREA. THE 34TH AND 39TH BATTALIONS ARE BELIEVED TD BE INDEPENDENT UNITS ASSIGNED TO THE SEME REGION. THEY WERE TEMPORARILY SUBORDINATE TO THE 33RD REGIMENT DURING THE TET OFFENSIVE AND DURING SUBSEQUENT ACTIVITY IN MARCH, APRIL AND MAY. C2/0/VCM/R411-61, FOLLOW-UP NR. 11, 112137Z> <5EeRET 3AVfN) XXHH 911 NNNM

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