DOCID: 4129544

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(b) (3)-P.L. 86-36

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· TO NSAl"<TANGO .ALFA~:J ZEH -"' T e p -5 E e R E ,. YMBrfA SECTION FOUR

~~~;4:~017142 I511TAR<IN PARAS MARKED> •Oo'CJRA;;,;71 NATIONAL SECURITY/AGENCY SOUTHEAST ASIA SIGINT SUMMARY xx cc 04. RVN MILITARY REGION 4 IN KIEN HOA PROVINCE, ELEMENTS OF THE BEN TRE

PROVINCIAL UNIT HAVE DISCUSSED THE RESULTS OF RECENT COMMUNIST TACTICAL ACTIVITY. IN RECENTLY AVAILABLE 6 AND 11 APRIL CORRESPONDENCE,. THE PROBABLE MO CAY DISTRICT UNIT AND THE PROBABLE NORTHERN MO CAY DISTRICT COMMAND.HAVE REPORTED TO EACH OTHER COMMUNIST TACTICAL OPERATIONS .. ITHIN THEIR RESPECTIVE AREAS. DURING THIS TIME PERIOD COMMUNIST FORCES HERE PRIMARILY TARGETED AGAINST ALLIED CIVILIAN DEFENSE AND SECURITY GUARD FORCES~ CONDUCTING STRIKES AT THANH THAI <XS 4313, ll-14N 116-18E>, NHUAN PHU TAN <XS 3719, 11~87N 116-15E), PHU HOA (UNLOCATED> AND GIA PHUOC <XS 3726, 11-llN 116-15E). THE COMMUNISTS ADDITIONALLY CONDUCTED ATTACKS AT TAN TRUNG CXS 5312, 1'-lf3N llf6-23E>, MINH DUC MARKETP.LACE CXS 5511, ll-l3N ll6-25E> HUNG KHANH .TRUNG CXS 3623, 11-llN 116-14E>, BA VAT <XS 4125, 11-llN 116~16E> AND BANO TRA CUNLOCATED>. MORE RECENTLY, ON 15 APRIL THE PROBABLE MO CAY DISTRICT UNIT DIRECTED THE DISTRICT COMMAND, ELEMENT TO DEPLOY THE 269E SAPPER COMPANY TO RECONNOITER (ALLIED> ARTILLERY POSITIONS AT DON NHON <UNLOCATED>. EISll'fARJ THE PROBABLE MR 3 TACTICAt CONTROL ELEMENT f.EJ822·)) HAS BEEN RElDENTIFIED AS THE SUSPECTED MR 3 REAR SERVICES AUTHORITY t:EJJ8'2U:+ IN ADDITION, THREE MILITARY ENTITIES C<E2186;-:. <f268f:,AND cE2928), HAVE BEEN IDENTIFIED AS SUSPECTED REAR SERVICES ASSOCIATES. THE REAR SERVICES AUTHORITY WAS LOCATED ON 16 APRIL"" IN ITS NORMAL AREA OF -OPERATION IN CENTRAL CHUONG THI EN PROVI~CE AT WR 417716 U9-41N llf5~22E>, 91 ICM SOUTHWEST OF ITS 8 APRIL POSITION

1 .. IN_ .. ,,SOUTHHESTERN DINH TUONG PROVINCE, OE

ASSOCIATE fE2186>l HAS LOCATED ON 5 AOGUST 1971 IN NORTHWESTERN AN XUYEN rngn~~E o~ Tavfto~~~:n 1 n12i ~ ~g~r~l~~. ~I~~ g~~~~D P~~~y~~~ Tf r <-~~6~f =~1 ~~s c '9-44N ll5-l6E). TO THE NORTH, THE THIRD ASSOCIATE CE2928-PHAS LOCATED ON 15 JULY 1971 IN UTHERN KAMPOT PROVINCE, CAMBOQIA, AT VS 311836 <11-42N 114-22E>.

.MOLNA lt£PDR l!D'OH rr'Ar-dl·' THAT-AS OF 9 APRIL lHREE.U.S • ( 1· ---=-7~2c' l31646Z APRt7Z> _:l!tEeRl:!-.:9P8KE ? I911TAK> B. MnA'jllP.fRTl"'·OR .... VIS . .123 RVN SO~DIERS-HAD IEEN TAKEN PRISONER AT LDC NINH CITY ciu

7411199, 11-5 N 1'6-35E>, LOC Nl~H bISTRICT, BINH LONO PROVINCE. uceRET SP8KE ~· ISllTARJ II. CAMBODIA A. MILITARY SITUATION l. MILITARY REGION 2 CAMBODIAN COMMUNICATIONS OF 15 APRIL DISCLOSED THAT SINCE 11 APRIL, VC/NVA FORCES HAVE SURROUNDED FANK AND ARYN POSITIONS AT KOMPONG TRACH, HAVE CUT THE ROADS LEADING INTO THE TOHN AND HAVE BEEN ATTACKING $NEARLY ALL THE TIME.$ ACCORDING TO THE SAME REPORT, THE RESULTS FOR THE 11 TO 15 APRIL ACTIVITY IN KAMPOT PROVINCE HERE, FIVE FANK HOUNDED AND l.4 BUILDINGS DESTROYED1 FIVE ARVN KILLED, 111 ...

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@'pproved for release by l\JSA on 07-03-2014. Transparency Case# 6588tl

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

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DOCID: 4129544

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HOUNDED AND MISSING, THREE 11s•s, THO M-113'5 AND ONE'HELICOPTER DESTROYED; ENEMY CASUALTIES HERE LISTED AS 781 DEAD AND HOUNDED. ·PREVIOUS SIGINT REVEALED THAT THE KOMPONO TRACH AREA HAS BEEN THE TARGET OF HEAVY ENEMY PRESSURE SINCE LATE MARCH. ELSEHHERE IN MR z, 711 VC/NVA DEPLOYED IN CENTRAL KOMPONG SOM MILITARY SUBDIVISION, REPORTEDLY PLAN TO ATTACK A GOVERNMENT POSITION LOCATED S KM NORTHWEST OF VEAL RENH. ON 14 APRIL THE SUSPECTED MILITARY INTELLIGENCE SECTION OF HQ, PHUOC LONG FRONT HAS LOCATED AT VS 454764 <ll-38N 184-29E) IN SOUTHEASTERN KAMPOT PROVINCE, APPROXIMATELY 118 KM SOUTH OF ITS 19 NOVEMBER 1971 LOCATION IN NORTHEASTERN KDMPONG SPEU PROVINCE. CI911'fAR> XXHH 998 13964 NNNN

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DOCID: 4129544

Classification: ~ee SEEftE~//~I

*** Document 1 of 1 *** PIECE YR72 ( 1) . DOCN 000140231 DE DEi I

#3964 1082200

TOI' SECftET//51

ZNY ZNY MMNSH ZKZK PP ZLZ DE P 1720002 APR 72 FM FM DIRNSA TO TO NSA/TANGO ALFA

ZEM CLAS ~ e e s E G R s T b'DHHtA SECTION FOUR XXMM XXMMENP04-0017042 ISII'fAR(IN PARAS MARKED) SERI* SER I AL: 3 / 00 QR9 4 ""72 --- ----------------- ------------ -

NATIONAL SECURITY AGENCY SOUTHEAST ASIA SIGINT SUMMARY TEXT XXCC 04. RVN MILITARY REGION 4 IN KIEN HOA PROVINCE, ELEMENTS

OF THE BEN TRE PROVINCIAL UNIT HAVE DISCUSSED THE RESULTS OF RECENT COMMUNIST TACTICAL ACTIVITY. IN RECENTLY AVAILABLE 6 AND 10 APRIL CORRESPONDENCE, THE PROBABLE MO CAY DISTRICT UNIT AND THE PROBABLE NORTHERN MO CAY DISTRICT COMMAND HAVE REPORTED TO EACH OTHER COMMUNIST TACTICAL OPERATIONS WITHIN THEIR RESPECTIVE AREAS. DURING THIS TIME PERIOD COMMUNIST FORCES WERE PRIMARILY TARGETED AGAINST ALLIED CIVILIAN DEFENSE AND SECURITY GUARD FORCES, CONDUCTING STRIKES AT THANH THAI (XS 4313, 10-04N 106-18E), NHUAN PHU TAN (XS 3719, 10-07N 106-15E), PHU HOA (UNLOCATED) AND GIA PHUOC (XS 3726, 10-llN 106-15E). THE COMMUNISTS ADDITIONALLY CONDUCTED ATTACKS AT TAN TRUNG (XS 5312, 10-03N 106-23E), MINH DUC MARKETPLACE (XS 5511, 10-03N 106-25E) HUNG KHANH TRUNG (XS 3623, 10-lON 106-14E), BA VAT (XS 4025, 10-lON 106-16E) AND BANG TRA (UNLOCATED). MORE RECENTLY, ON 15 APRIL THE PROBABLE MO

CAY DISTRICT UNIT DIRECTED THE DISTRICT COMMAND ELEMENT TO DEPLOY THE 269E SAPPER COMPANY TO RECONNOITER (ALLIED) ARTILLERY POSITIONS AT DON NHON (UNLOCATED) . ( ISII'fAR) THE PROBABLE MR 3 TACTICAL CONTROL ELEMENT (E0822) HAS BEEN REIDENTIFIED AS THE SUSPECTED MR 3 REAR SERVICES AUTHORITY (E0822). IN ADDITION, THREE MILITARY ENTITIES (E2186, E2680

AND E2928) HAVE BEEN IDENTIFIED AS SUSPECTED REAR SERVICES ASSOCIATES. THE REAR SERVICES AUTHORITY WAS LOCATED ON 16 APRIL IN ITS NORMAL AREA OF OPERATION IN CENTRAL CHUONG THIEN PROVINCE AT WR 407716 (09-41N 105-22E), 90 KM SOUTHWEST OF ITS 8 APRIL POSITION IN SOUTHWESTERN DINH TUONG PROVINCE.

b) ( 1- f' . L . 86 - 36

- (b) ( )

(b l ( l - ~o use 403 ( b ) ( ) - 1" Ll .3C 79e (b) I -P.L. % - 36

OE ASSOCIATE (E2186) WAS LOCATED ON 15 AUGUST 1971 IN NORTHWESTERN

Classified By: .... I __ __. Derived From: NSA/CSSM 1-52

Dated: 20070108

Declassify On: 20380301

TOP SEERET//SI

DOCID: 4129544

AN XUYEN PROVINCE AT VR 842428 (09-26N 104-SlE) . THE SECOND ASSOCIATE (E2680) WAS LOCATED ON 8 NOVEMBER 1971 IN SOUTHERN KIEN GIANG PROVINCE AT WR 108767 (09-44N 105-06E). TO THE NORTH, THE THIRD ASSOCIATE (E2928) WAS LOCATED ON 15 JULY 1971 IN SOUTHERN KAMPOT PROVINCE, CAMBODIA, ATVS 311836- · · ( l0-42N l04-22E J • ( 2QvcM/M1"'72;qqT3T646z APR n J ( ~EeRET ~FeHEl ISIITAR) B. MOLNA REPORTS ON U.S. AND RVN POWS MOLNA REPORTED ON 11 APRIL THAT AS OF 9 APRIL THREE U.S. ADVISORS AND 1,123 RVN SOLDIERS HAD BEEN TAKEN PRISONER AT LOC NINH CITY (XU 740099, 11-SON 106-35E), LOC NINH DISTRICT, BINH LONG PROVINCE. ( SEERET SPOKS ISl!Tl1R) II. CAMBODIA A. MILITARY SITUATION 1. MILITARY REGION 2 CAMBODIAN COMMUNICATIONS OF 15 APRIL DISCLOSED THAT SINCE 10 APRIL, VC/NVA FORCES HAVE SURROUNDED FANK AND ARVN POSITIONS AT KOMPONG TRACH, HAVE CUT THE ROADS LEADING INTO THE TOWN AND HAVE BEEN ATTACKING =NEARLY ALL THE TIME.= ACCORDING TO THE SAME REPORT, THE RESULTS FOR THE 10 TO 15 APRIL ACTIVITY IN KAMPOT PROVINCE WERE% FIVE FANK WOUNDED AND 14 BUILDINGS DESTROYED; FIVE ARVN KILLED, 100 WOUNDED AND MISSING, THREE 105'S, TWO M-113'S AND ONE HELICOPTER DESTROYED; ENEMY CASUALTIES WERE LISTED AS 700 DEAD AND WOUNDED. PREVIOUS SIGINT REVEALED THAT THE KOMPONG TRACH AREA HAS BEEN THE TARGET OF HEAVY ENEMY PRESSURE SINCE LATE MARCH. ELSEWHERE IN MR 2, 700 VC/NVA DEPLOYED IN CENTRAL KOMPONG SOM MILITARY SUBDIVISION, REPORTEDLY PLAN TO ATTACK A GOVERNMENT POSITION LOCATED 5 KM NORTHWEST OF VEAL RENH. ON 14 APRIL THE SUSPECTED MILITARY INTELLIGENCE SECTION OF HQ, PHUOC LONG FRONT WAS LOCATED AT VS 454764 (10-38N 104-29E) IN SOUTHEASTERN KAMPOT PROVINCE, APPROXIMATELY 108 KM SOUTH OF ITS 19 NOVEMBER 1971 LOCATION IN NORTHEASTERN KOMPONG SPEU PROVINCE. ( ISIITA~) XXHH 900 #3964 NNNN

===EOO=== ===EOD=== Classification: TOP SEeRE'f//SI

( ) (3 ) -P . L. b 6- 3

\ b ) (3)-P.L. 86-36

Classified By:I._ __ _,

Derived From: NSA/CSSM 1-52

Dated : 20070108

Declassify On: 20380301

TOP SECRET;'/51