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ME.SS.AGE = ssn:92~ 1

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ZKZK -PP \ . . . 8Z FM DIRllSA TO ·rise~· "l"FbRM TANGO-· ZEM J,;9 ·'p s E e···" I! T _ . ECTIOtl .s MMENPS7-TB"8B49 3/0~R34-69 NATIONAL s'ECURITY .AGEHCY

C'S"OU.T.Ji ·_- _ - · \ IGIHT SUMMARY XXCC I II. l • AIR DEFEUSE ACTIVITY THE POSSIBL E-DOHfntlo OF A B-26K AIRCRAFT HAS REPORTED rn A COMMUNIQUE OF 27 MARCH FROM TOAN'CTOANF., AT THE 18Ttl AAA BATTALION>. IT NAS DISCLOSED THAT TllREE GUNS OF THE 30 tOMPA~Y AT TA LE Cl7-11N 1S6-B9E, XE23B2) HAD EXPENDED 32 ROUNDS AT THE AIRCRA,T. TH~AIRCRAFT WAS HIT AND BURST IHTO FLAMES. THE AIRCRAFT HAS LAST SEEN ODINO ~OWN IN A SOUTHEASTERLY DIRECTION FROM THE 3D COMPANY.S POSITION. < 3EfR.l'.;-f SPB~(;) B. lAOS-SOUTH VIETNAM BORDER ACTIVITY A REFERENCE TO "DECOY TROOPS" IH THE VIClHITY OF HIGH POIHT 1SS9 <BELIEVED TO BE AT XD 9282, 16-lBH 1J6-47E> HA~ DISCLOSED IH A 27 MARCH MESSAGE FROM "GHINH CNGHINH, NOT FURTHER lDEtHIFIED> TO COMMAl.lDER TAii CTAAH, PREVIOUSLY ASSOCIATED HITH TltE 3P REGIMEtH >. NGHitlH REPJlRTED THAT A SEARCH DETACtlMEUT HAD STARTED ACROSS HIGH POINT 1Sl9 ON THE MORHillG OF 23 MARCH AUD AT g9gso, HELICOPTERS ARRIVED AT 1SS9 AND THE SOUND OF INFANTRY H~APONS-FIRE HAS HEARD. THE MESSAGE STATED THAT IT HASN.T CLEAR WHETHER It HAS FIRING FROM THE DETACHMENT OR ENEMY GROUHD FORCES FIRIHG ON THE qDECOY TROOPS." A SECOND 27 MARCH REPORT, FROM AN UNIDENTIFIED PERSUUALITY PROBABLY l\T HIGH POIIH 1232 <POSSIBLY AT 16-18H JS6-45E XD87B4,) TO COHMAHDER TAN CTAAH> REVEALED A CLASH WITH ALLIED FORCES. A SEARCH AND DESTROY TEAM, UPOtl llEARIJIO GUii- FIIH: IU THE DISTANCE, JOitlED UP WITH THE ·MILITIA OF A XIN VILLAGE (POSSIBl.Y A TS.IH, 16-1811 IS6-5SE, XD 9712) AND ATTACKED THE ALLIED TROOPS, HHO HITHDREl-1 TO AH.UllHAMED MOutlTl\IN. THERE HAS .HO REPORT OF CASUAL TIES ON EITHER SIDE. (21-Gll/vcr·l/12622-69, lU25'1Z> (5E6RE;l SP9K&> c. MILITARY SITUATION UOKTHERN LAOS ROYAL LAOTIAN ARMY <RLA) COMMUNICATIONS REPORTED THAT THE PATHET LAO CPL> 761ST BATTALIOH WAS LOCATED ABOUT 3S KM NORTH OF SOP KAI <21-8211 U2-26f, TJ .3429), Ill SOUTHERN PHOUG SALY PROVINCE, MR I ON 4 APRIL. ALSO, THREE PL COMPANIES HEREREPORTEULY DEPLOYED IN AN AREA 15-2S KM NORTH OF HAM BAC CZIJ-38N 1'f2.-28E, TH 3584), LUANG PRABANG PROVINCE. TO THE EAST, RLA VOLUNTEER BATTALION ' CDV> 27 REPORTED HEAVY ENEMY PRES- SURE ON ITS POSITION ABOUT 18 KM NORTHHEST OF MUONG HIEM CLS- 48A, 21f-ff5N 1Bl-23E, HU 3ff22) AND

_REQUESTED AID . TtlE P~EVIOUSL Y IU:PORTED Sl·•EEP INVOLVIHG RLA BV 24 IN SOUTtlHESTERH XIENG KHOUAHG PROVINCE, MR Z, HAS RESULTED IH THE CAPTURE OF BAH POUNG Cl9-16N lSl-19~ UG 2331), nAN MAY Cl9-14N 1S3-16E, UG 1928), AND NAM SAB Cl9-18N 183-22E, UO 1927). THO COMMUNIST ROAD AMBUSHES WERE REPORTED IH VIENTJAllE PROVIHCE, MR 5. ONE OCCURRED ON ROUTE 13, JS KM NORTH OF VIENTIANE. THE OTHER, JH THE MUOHtr. OUM~ <18-38N 182-53E, TF 4676 > AREA OF NORTHERN VIENTIAUE ACTIVITY. CZ -LSMl'Tti24-6~8S312Z. 2/GD/(SM/T662-69, "51"1f9Z. T681-69, 878942Z. T688- S3if41'8Z. 21...JLSY/Tl75-69, 881144Z> SOUTHERN LAOS THE -• f8P sreRET tJtlBRA

@>pproved for release by NSA on 06-06-20 14, Transparency Case# 6588a

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DOCID: 4123937

--

TBP 5Etft~T t:Jl'IBRA __, ""-··

SITUATIOH AT DONG HEHE (16•42H 1~5-17E, HD 3146), MR 3, HAS "BECOME CRITICAL," ACCORDING TO Att RLA MESSAGE OF 5 APRIL. SAND BAGS AND AMMUNITION HERE REQUESTED FOR FORTIFICATION OF THE RLA CAMP THERE. PREVIOUS SIGINT HAS REPORTED THAT AT LEAST OttE COMMUNIST BATTALION HAS NORTHWEST OF THE TOWN AND THAT AN ATTACK HAS EXPECTED OH 12 APRIL. XXHH 9"! ttttHN

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MfSSAGE : Sif S89242

; ' . z FM DlRllSA' TO osctlF IFORWTAN.GD' ZEM f, rf/f°'' 5 E:e-·R" E T SECTIOH I.G~MENf'l!.8-TBff8if49 .V~ ·. :HB4-69 ·NATIONAL SECURITY"'AGEtlCY

cS:dO_TffE ___ ~ ·. A~SiGitlT SUMMARY. XXCC \OH 6A ,-aHE flVA 4TH BATTALION, LOCATED IH lHE. HC 8476 <16-i14N US-47 EJ VICINITY OF SAVANtlAKET PROVINCE, DIRECTED POSSIBLY lJS 12111 COMPAtlY TO REST Oil 7 APRIL AN)) DRAW EXPERIENCE FROM ITS RECEflT ACTIVI.TI ES. CARE ~IAS TO DE TAK EU HmlEllER, TO MA INT A HI SECURITY AND GUARD AGA rnsT \ "DEADL y EtlEMY AIRCRAFT. II mt \.COMPAllY l·IAS FURTHER ORDERED TO PREPARE AN UN- DISCLOSED PLAN AtlP SEND IT TO B.AT.TALION THE Fouomuo DAY. ON 7 APRIL THE COMPANY IllFO~MED .THE BATT Al. I OH THAT H tlAD GONE TO COORDINATES I-IC 8364 ( 15-57N U5-47E)~ MC\.8464 Cl5-57tl 1'15-48E), we. 8564 (15-57N U5-49f), HC 8664 Cl5-57N U5-5iff),\ ~IC,876 .. 4 Cl5-57N li!l5-5lf), WC\8864 Cl5-57N llJ5-52E), HC 8665 Cl5-58N lfJ5-5SE>, .AUD\.HC. 8765 Cl5-58N U5-5lf.) fOR THE "PAST mo MORllINGS. 11 THE PRESEllCE OF AN (.HUDEllTI FlEIJ UNIT AT I-IC '833642 Cl5-57N 1S5-47E> AND THE PLACENAME lJAH PHOU PHAY ( l.5-58U llf5-53E, we 9165) HERE ALS.O MEtffIOtlED, THE LATTER Itl AH UNCLEAR CONTEXT. THE BATTALION WAS ALSO INFORM.ED BY THIS COMPAHY TttAT IT ~fA·S\ RESTING, IN ACCORDAllCE HITH THE DIRECTIVE SENT O.N 6 APRIL. COMMUtnCATIOtlS Of 6\ APRIL BfTl~EEN THE B'ATTAL lON AND ITS 9TH C.OMPANY DISCLOSED THAT THE COl·iPANY NA$. TO PRACTICE "SAPPER TACTtCS," SEARCfs OUT AUD DESTROY THE

mrr E~ ~mx~~' A~mi. ~~D F~i~~ ~fiE H~~~Hl~8Hm~~ ~:~~~M"~~~ ~=~OUP~ io~N THAT 7 4 COMRADES OF.THE tlVA 5Tll BATTALlOH HAD ARRIVED. C3 R79-69. 2X LSMi'T231-69, B81f7fl2Zl (5feRl;,'f 5fBKf.J IV. CAMBUDIA MILl.TARY SIT N' MILITARY GION 1 A VIET corm CAMP\ REPOR't·i:DLY IS LOCATED AT HT 16ff8 (11f-56t4 185-S9E) SOUTH OF THE DENG YANO 0S-56H 11J.5-if8E, HT 15-B8> STREAM.KANDAL MILITARY SUBDIVISION (MSD), THE AREA Of THE. CAMBODIAN OPERATION PREVIOUSl Y REPORTED. THE VC HOLD COMBAT ltlSTRUCTJONS AT\ llIGlil. AUD llAVE SET UP A PERIMETER AROUND T.HE CAMP. THE TROOPS REPORTEDLY ARE HSPREAD OUT" SOUTH OF. TllE RlVl!R. ON 6 APRIL, A U. S ./ARYN AIRCRAFT /AllEGEDl Y OVERFLl.:1-1 Atl AREA S.OUTH 0.F KAAM SAMNAR KROM ClS-58N Ul5-11E, WT 19"8)/, ALSO IN KAllDAL MSD, nm VIETNAMESE FAMILIES, REPORTED ACCOMPLICES OF THE U.S,l'ARVH, CROSSED IllTO SOUlH VIE'fNAM ON 4 APRIL. IN SOUTHWESTERN SVAY

_RIEHG MSD, U.S.l'ARVtl AIRCRAFT REPORTEDLY BOMBED AllD STRAFED ALONG THE BORDER ON 7 APRIL. IH THE SAME MSI), AH. ALLEGED U.S.l'ARVll :AIRCRAFT WAS FIRED UPON BY CAMBODIANS DURING AH OVERFLI • . .

-· .

T 5 APR L.

DOCID: 4123937

-•

i/ ., . r; ;> HIP SEe~tT tm.~ftA

2rv·cEP'ITJ14-69 i!71Z'15Z. 2AVCE'tn247-69, i!7145i!Z. T249-69, i!8i!351Z. T25i!-69, 1m2sz> MILITARY REGION 2 m'ELS nr MR 2 ARE REPORTEDL y RECEIVING ~'EAPOHS AND AMMUNITION FROM AN UNKNOfRf SOURCE IN SOUTH VI~· H AND MEDICINES FROM THE "CAPITAL," ACCORDI"G TO A 7 APRIL M~SSAGE; {2 CEY1t251-69~~8i!6i!i!Z> MILITARY REOIOfl 3 otl 6 APRIL, THE 46 Tll AflD SSTll lllFAllTR ATTl\llOHS J'ULL B.~ SEfffJO THE THAI-CAMBODlAfl BORDER AREA Itl BATT AMBANG AHD THMAR PUOK MSDS TO ASSIST Uf A "PREVEtlTATIVE OPERATION AGAINST POSSIBl.E ENEMY ATTACKS. n ALSO IN MR 3, ELEMENTS -

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18SZ32Z. 21.......fpEMITZSif-691 Jlif737Zl MltlTARY REGIOH 4 XXHH 91JUN

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'•·• \.A 5 APRIL MESSAGE REPORTED THAT A CAMBODIAN FAMILY FL . THE BAN TAH Cl4-27N . 1S3-27E, UA 6198) ZOtlE IH THAILAllD AUD SURREllDERED TO CAMDODIAll AUTHORITIES IN

ODDAR MEAllCHEY MSD. THAI\ AUHIORJTIES REPORTEDLY STATIOUED ADDITIONAL POLICEMEN AT~BORDER VILLAGES TO PRt::\lt:tlT SUCll FLIGHThtY TtlAIS OF CAMBODIAN ORIGIN. (2 f/T3B-69, B5B833Z. 132-69, B9B635Z. 2 CEPYT17-69, d7134BZ.

-3/ _Tl6-69,--2-62131Z FEBhMlLITARY REGION ·IO 37-MM AND THO PROBABLE 14·:- -MM HEAPotlS ~IERE_· TO BE-'DEPLOYED IH RATAUAKIRI MSU; ACCORDIUG TO A 5 APRIL MESSAOE. AS PREVIOUSLY REPORTED, .A 37-MM BATTERY 1-lAS TO BE SEUT TO THAT M:iD .ON 29 MARCH FOR TllE VISIT Of PRlNCE SIHANOUK. CJU 3 APRIL, THE 21ST, 23RD, AND .27TH IUFANTRY BATTALIONS i-IERE ORDERED TU ACTIVATE SECURITY PATROLS AGAIHST REDets

.. ARO.UllD THE KES CHONG ( 13-t16tl U7-l5E,. YA 4424) POST AND TO ESTABLISH A FlRING PLAN FOR THE POST .S HEAVY ~IEAPOHS. OtfJHE SAME DAY, ELEMEHTS.FROM BONHOK

.. <l3-48N Ul7-16E, YA 2726 > POST AMBUSHEll FIVE REBELS NEAR THAt POST, 'KHLIHG THO ••· AUD \HOUNDING THREE. ON 2 APRIL; 31. CAMijODIANS OU PATROL SJ(tRMISHED H_lTH REBELS \ APPIWXIMATEL Y 3 KM SOUTHHEST OF POy < l3c4..9U llf7-1'3E, YA.1929 >. A GROUP OU ·•.· OPER.ATION rn TUE AREA OF/KALAY ( 13""'.SlU lf6-55E, YA 8732) ATTACKED APPROXIMATELY U 15 REBELS WAITIHG 1H AMBUSH OU 38 MA.RCll, FO.RCitro THE. REBELS TO RETREAT. IN J STUl4G TREllG MSD, ItLA 7 APffll MESSAGE IT HAS. REPORTED THAT A SW_El:P OPERATION IS >TO. T~LACE IN T~OEUtl MOUtlTAIN REGIOH AT~6845 (l3-57H U6-34E>. •·•·· <31·0- R~-9-• Z ~CEK/TlZ9-69, i!"/S513Z. Z . CEMl!'T2B3-69_ ~/J81355Z. 12114-69, i lf8P5 . z . c·i:ot. 6-69, a713'i3Z. T2if7-69, \ . l5Z) MILITl\RY REGION 6 HIREE JU.S./ARVll AlDER AIRCRAFT ALLEGEDLY FlEH OV.ER SNOUL Cl2.-S.4.N Uf6-.26E, XU ..;..ss · ··

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