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25D 3582351 ZKZK P,. RHI DE P ·23211HZ FM DIRHSA TO -OSCAYFORM TANGO " ZEM T e 'p 5 E e R E T l::IP1BRA SECTIONIWO XXMMENPf2-TB23128 31'0 R 7-68 NATIONAL SECURITY AGENCY SOUTHEAST ASIA SIGINT SUMMARY XXCC 3~1~IRY REGION TRI-THIEN-HUE COMMUNICATIONS BETWEEN "FRONT 6" C ASSOCIATED WITH OROUP--DOAN--6) AND ITS 35TH BATTALION CPOSSIBLY ltlE 835111 ARTILLERY BATTALIOll) INCLUDED A REFERENCE TO A "D-DAY" AND REPORTS OF ALLIED FORCES UPERATINO NEAR A COMMUNIST HOSPITAL SITE. ON 23 DECEMBER, COMMUUICATIOllS FRUM HIE FROIH lO THE BATTA LION REFERRED TO A "D-DAY." NO FURTHER IllFORMATION 011 THIS SUBJECT WAS DISCLOSED. EARLIER, THE 35TH BATTALION REPORTED TO "FRONT 6" TH AT AN ALLIED FORCE HAS AN UNSPECIFIED DISTAHCE FROM "HOSPITAL 48, "'/AllD THAT ALLIED RECONNAISSANCE ELEMENTS WERE OPERATING OH BOTH SIDE~fOF KllE TRANG CPUSSIBLY RAO TRANG, 16-23N U7-19E, YD 488138>--SOME 31 KM l~EST OF llUE>. TllE MESSAGE ALSO DISCLOSED THAT THE COMMUNISTS WERE CLOSELY FOLLOWING THE ALLIES IN lHAT AREA. (2/·Glll'VCM'l'T11262-68, 23882SZ. T11261-68, 231741Z> ESEERET Sfi'eKE> 4. MILITARY REGION 5 HQ, NVA 3D DIVISIOH FORWARD ELEMENT ONE HAS BEEN REACTIVATED IN THE QUANG NOA! PROVINCE AREA. IN THE CENTRAL HIGHL ANDS, COMMUllIST MAIN FORCE MILITARY UNITS APPEAR TO BE CONCENTRATING IN THE NORTHEASTERll PLEIKU PROVINCE AREA. IN QUANG NGA! PR OVINCE, HQ, NVA 3D DIVISION FORWARD ELEMENT ONE WAS REACTIVATED, APPARENTLY ON 2S DECEMBER. THIS FORWARD ELEMENT MERGED WITH THE DIVISI ON HEADQUARTERS ON ABOUT IS OCTOBER IN SOUTHWESTERN QUAllG NGAI PROVINCE AND HAD NOT BEEN ACTIVE IN COMMUNICATIOllS UNTIL RECEllT ACTIVITY OBSERVED OH 2f-21 DECEMBER. THE·HQ, NVA 3D DIVISION WAS LOCATED NEAR 13-5811 188-27E CDS 258461) ON 28 DECEMBER, WHILE THE FORWARD E LEMENT IS UNLOCATED. A HIGH VOLUME OF MESSAGES CAT LEAST 38> HAS RECEIVED BY HQ, NVA 3D DIVISION FORWARD ELEMENT ONE FROM HQ, MR s MAIN FORCE UNIT ·coNTROL, ON 21 DECEMBER. IN THE CENTRAL HIGHLANDS, VIETNAMESE COMMUNIST MILITARY UNIT ACTIVITY SUGGESTS THAT A BUI LOUP OF COMMUNIST MAIN FORCE UNITS MAY BE OCCURRING IN THE NORTHEASTERU PLElKU PROVINCE AREA. WITHIN THE PAST HEEK TERMINALS SERVING Tll E PROBABLE HQ, NVA 24TH REGIMENT AND A SUSPECTED NVA B3 FRONT ARTILLERY UNIT C-M.lf858·)., HAVE BEEN LOCATED IN THIS AREA. THE PROBABLE HQ, N VA 24TH REGIMENT llAD PREVIOUSLY OPERATED IN THE CAMBODIA-LAOS-KONTUM PROVINCE TRI-BORDER AREA, AND THE

_SUSPECTED ARTILLERY UNIT .CMlY858-) HAD PREVIOUSLY OPERATED IN TJIE NORTHWESTERN PLEIKU PROVINCE AREA. ANOTHER UNUSUAL DEVELOPMENT HOTED'IN THIS AREA INCLUDES INDICATIONS OF THE ESTABLISHMENT OF COMMUllICATIONS IN EARLY DECEMBER BETWEEN HQ, NVA l8TH REGIMENT, NVA 3D DIVISION, WHICH IS OPERATING Ill CENTRAL DINH DINH PROVINCE, AND THE GIA LAI PROVINCIAL UNIT--OPERATING IN TllE PLEIKU-DINll DIUH PROVINCE BORDER AREA. ELEMENTS OF THE PROBABLE NVA 95B REOIMEfH, WllICll NORMALLY OPERATE IN THE PLEIKU-BINH DINH PROVIHCE BORDER AREA, HAVE RECENTLY BEEN INVOLVED IN ATTACKS AG AIHST ALLIED LIHES OF COMMUNICATIONS lll THE

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DOCID: 4129058

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NORTHWESTERN PLEIKU PROVINCE AREA. AVAILABLE IHFORMATIO" I"DICATES THAT THESE ATTACKS HILL CONTINUE. ON 21 AND 22 DECEMBER, REGIMENTAL ELEME"TS UISCUSSED ALLIED TROOP DEPLOYMENT AND SHEEP OPERATIONS AND FORTHCOMING VIETNAMESE COMMUNIST TACTICAL ACTIVITIES AGAINST ALLIED FORCES NllICll HERE PLANNED FOR 27 OR 28 DECEMBER. ON 22 DECEMBER, THE PROBABLE IST BATTALI ON, NVA 958 REGIMENT ASSOCIATE :--cM4-53·5') REPORTED THAT APPROXIMATELY ONE ALLIED COMPA"Y 111\U BEEN LANDED IN THE-VICINITY OF "DAC SI RO, 3 2 24 8." THESE COORDINATES POSSIBLY EQUATE TO 13-52N 1B8-27E CBR 242325) AHO TltERE IS A DAC XDRO I" THE AREA OF 13-52N Uf8-38E CBR 2893 33). THE lST BATTALION ASSOCIATE STATED THAT XXllll 9"8 NNNN

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. 2 z M ~~A TO .OSCAR/U~M TAimo J 7i:Ji"=::;::::::ft.;t~..:f:~+:...e===tr:.:.;;t.,f.tu~B R~A~ Sf cu IW Ttf RE £ XXMMEUP" 3-TB 2 312 8 3/ 0 :R 3ft7 -6 8 NATIONAL SECURITY AGENCY SOUTHEAST ASIA SIGINT SUMMA RY XXCC UR RHEAD HAD DEPLOYED TOWARD "A-5" <ACCORDING TO COLLATERAL, IN THE VICl"ITY OF 13-46" 188-27E, BR 2524), WHILE A SECO ND DEPLOYED I" THE DIRECTION OF "LANG BUT" <PROBABLY NEAR 13-56N lB8-3fE, BR 3Bl425> ALO"G THE COMMUNICATIONS ROUTE, AND THAT ALLIED F ORCES WERE POSITIONED NEAR "42 26 8" (POSSIBLY EQUATES TO 13-58N 1'8-28E, BR 262425) AND "46 22 16" <POSSIBLY EQUATES TO 13-58N lff8-26 E, BR __ , 225462). EARLIER THE SAME DAY, THE PROBABLE REGIMENTAL FORHARD ELEMEHT (C.M4583.) ::--, INFORMED THE lST BATTALION ASSOCIATE OF AN ALLIED SHEEP OPERATION AT "LO BO" CUNLOCATED> IN "AREA 6" <ACCORDING TO COLLATERAL, ADMINISTRATIVE AREA 6 IS APPROXIMATELY THE SOUTHEASTERN QUA RTER OF PLEIKU PROVINCE>, "1\-U" <ACCORDING TO COLLATERAL, IN THE VICINITY OF 13-49N l,8-38E, BR 2845) AND "AREA 7" <ACCORDING TO COLLAT ERAL, ADMINISTRATIVE AREA 1 IS APPROXIMATELY SOUTHWESTERN DINH DINH PROVINCE AND NORTHER" PHU BON PROVINCES>. IN ADDITION, THE PROBABLE FORWARD ELEMENT STATED THAT DUE TO THIS ALLIED ACTIVITY, "IT IS-ESSENTIAL TO STRENGTHEN THE SCATTERED ACTIVITIES ON THE ROAD," AND DIRE CTED lHE SUBORDINATE TO COORDINATE AN ATTACK BETWEEN AN ELEMENT OF "X-17fl AHD LOCAL FORCES <ACCORDING TO COLLATERAL, X-17 IS AN ENGINE ER-SAPPER COMPANY SUBORDINATE TO THE GIA LAI PROVINCIAL UNIT>. THE PROBABLE·FORWARP ELEMEllT ALSO CAUTIONED TllE SUBORDINATE TO WAH OUT F OR AN ALLIED FEillT. FIUALLY • 011 22 UECEMDER, A SUBORDINATE OF THE REGIMENTAL FORHARD ELEMEtH 1,rD2265l IHSTRUC"fEU HIE PROBABLE lST BATTAL ION ASSOCIATE TO POSTPONE AN ATTACK FROM 27 DECEMBER TO 28 DECEMBER "BECAUSE THE 27TH IS STILL <<A PART OF> 3. ,-8.- 1,9 3.K 435 .8,8. CJ793. 95 "PHUP IY 31 PW 491- .. -1.- C,9+8-. 4. "' 348. 3.-3 ,9 .238 .. J+,97. V389473 l,­M.M7 95 .431-3) 654-f 1,3. 95 .-,538 •. 579. M8NfN1X91,8116Al49.X.7CN,.-H9C IYAHYRIUX9 S 3 4 3 • 3,8) . -531A A A A A A A A A A IYAUOR5Xl9CX9X/H IHQEH•5 .QPS,3.,// 6-49. 5 3 4 3 . MEZ APAP EklMX4- .9 95 -.,481 .. "UHHHEW 4 31 I.I 44 C"C" TWQPOTE PR .--<36 31 9"C,.6 81C •. 6 tlC,.6 -.(,.6 11-C,.6 9-C •. 6 -1< •• 6 19C..6 4)( .. 6 41<..6 ,-(-.6 9-"496 .89".6 .19 11 .6 1.-(36 ,1-(36 )1-(36 -1(416 -"41-6 ,C.1-6 -1-1-6 44 ED ZllZ AHZ HIZ DAZ ZDZ RR KZKZ" "· llllHll

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, SECTIOU EOVR XXMMENP4-TD23128 310 R3R7-68 NATIONAL SECURITY AGENtY so1JfttEAST ASIA SIGUH SUMMARY xxcc o 2DE:CEMBER, THE POSSIBLE 3D BATTALION, VC 274TH REGIMENT REPORTED TO ITS R EGIMENTAL HEADQUARTERS THE ALLIED SITUATION IN THE BATTALION.S AREA OF OPERATIONS BETHEEH 19 AND 21 DECEMBER. THE ORIGINATOR OUTLINED D ETAILS CONCERNING ALLIED GROUND, AlR, AND ARTILLERY ACTIVITY, AND REPORTED SEVERAL VIETNAMESE COMMUNIST PERSONNEL MISSING OR KILLED IN A CTION. THE MESSAGE ALSO MENTIONED A GUERRILLA AMBUSH ON AN UNSPECIFIED ALLIED UNIT AND THE BURNI~G OF J4 PRIVATE RESIDENCES BY ALLIED FIRE. (2/G_UfLVCJ/R356-68, 22142SZ> CSEERET SP81t[) 8. MILITARY REGION 2 ON 22 DECEMBER, THE SUSPECTED HQ, VC DT-1 RE GlMENT WAS LOCATED IN THE SOUTHERN DINH TUONG-KIEN PHONG PROVINCE BORDER AREA AT ll-21N 115-51E <HS 928417) APPROXIMATELY 17 KM SOUTHWE ST OF ITS 14 DECEMBER POSITION IN WESTERN DINH TUONG NEAR -ll-27N 1S5-57E CXS 132561). ON 23 DECEMBER, A PROBABLE SUBORDINATE~CM3588} OF THE BEN TRE PROVINCIAL UNIT WAS LOCATED IN NORTHWESTERN KIEN HOA PROVItlCE AT llf-llN UJ6-14E <XS 355265), APPROX IMA TEL Y llf .KM NORHll·IEST OF ITS 29 NOVEMBER POSITION HEAR Ul-B7H UJ6-19E <XS 436196>. CSl!.CR.l!T s.r..OKI!> ON 21 DECEMBER, AN UNIDENTIFIED SUB ORDINATE :cpnliJlf-> OF THE MY THO' ... PROVINCIAL COMMITTEE WAS LOCATED IN SOUTHERN LONG AN PROVINCE AT ll-29N 1B6-35E <XS 728Sbf PPROXIMATEL Y -16 KM -NORTHEAST OF ITS 11 OCTOBER LOCATION. (310 Rl57-68) E5Et!RET 5f'A.ltE> II. NORTH VIETtlAM A. IHFIL lRATIOHtLOGISTICS ACTI THE MOVEMENT OF GROUP 4831 FROM T-6 TO T-7 <PREVIOUSLY T-15 AHO T-16, RESPECTIVELY> HAS REFLECTED IN REAR SERVICES COMMUNICATIO"S OF 21 DECEMBER. THE GROUP COMMANDER WAS IDENTIFIED AS NGUYEN HAI HUNG <HGUYEENX HAIR HUNFG>. ALTHOUGH THIS GROUP HAS F IRST OBSERVED IH JUNE, IT JS BELIEVED THAT TllE GROUP DID NOT DEPART NORTH VIETNAM. THEREFORE, GROUP 4131 WILL BE COUNTED IN THE DECEMBER TOTAL AND DELETED FROM THE JUNE TOTAL. THE ADDITION OF THIS GROUP BRINGS JHE TOTAL OF NEW GROUPS.-OBSERVED THUS FAR IH DECEMBER TO 28. (2/0IVCJ/RSl-68, 222B21Z> (SEElET SP~~E> FROM 231iJPZ ON 21 DECEMBER TO 2259Z ON 21 DECEMBER, NORTH VIETNAMESE NAVAL RADAR ST ATIONS ALONG THE CENfRAL AHO SOUTHERN COAST OF NORTH VIETNAM REFLECTED A TOTAL OF 126 "FRIE"DLY"

_CARGO/SUPPLY VESSELS. THIS REPRESENTS A DECREASE OF 11 VESSELS OVER THE PREVIOUS 24-HOUR PERIOD. GENERALLY, THE VESSELS CONTINUED TO FOLLOW THE NORTH VIETNAMESE COASTLINE AT DISTANCES FROM l TO 12 NM, EXCEPT IN THE VICillITY OF THE 19TH PARALLEL, WHERE VESSELS FREQUENTLY EXCEED THE 12 MILE LIMIT. OF TllE 126 VESSELS REFLECTED, 52 HERE TRACKED IN AN AREA EXTENDING FROM 17-3ffN TO 18-llN AND THE REMAINING 74 WERE TRACKED IN AN AREA EXTEHDING FROM 18-ISN TO 21-HN. AH llNIDENTIFI ED RADAR STATIOH, POSSIBLY LOCATED AT DEO llGAllG REPORTED THE FOLLOWING AT J826 z, A MilllMUM OF FOUR PROBABLE CARGO VESSELS HERE -• . :?

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APPROACHING THE PIER AT NHAT LE CVICINITY OF 17-29N 186-37E, XE 7334). AT 1137Z AND 144JZ, AT LEAST TWO CARGO VESSELS DEPARTED VUNG LA <VICINITY 17-SSN 116-39E, XE 5981). FROM 1548Z TO 1637Z, A TOTAL OF FOUR CARGO VES SELS HERE DEPARTING POSSIBLY DEO NGANG EH ROUTE TO VUHG LA. THE FOLLOWI"G IS A SUMMARY OF THE VESSEL MOVEMENTS THAT HERE NOTE D DURING THE ABOVE PERIOD NR. OF DIRECTION OF MOVEMENT RADAR STATION VESSE LS NORTH SOUTH OTHER UtUDEtllIFIED STATION ~N2fl3J 21 2 14 4 UNK CVICINITY OF SAM SON 19-45N lff5-55E, HG 9583) DONO GIAN Cl8-33N 1~5-59E, 35 11 15 11 UNK HF 8549) XXHH 9Sf NN"N

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. ' CJIDN X XXMMEtlPB6-TB23128 3/0 R3 7-68 2·7D 3582358 ZKZK PP ,,RNI DE P 232Si18Z FM DIRNSA TO OS..CA.CFORM TANGO

NATI'ONAL SECURITY AGENCYJsou~~EAST AHA srnINT suMMl\RY xxcc cu., nclnuHs BETHEEN THE NORTH VIETNA MESE tlAVAL NORTHERH FLEET HEADQUARTERS CtlFHQ> AT 81\1 CHAY AND .AN UNIDENTIFIED VESSEL ·CNSI85F DISCLOSED THAT l\tl UtlDETERMIUED lYPE OF OPER ATION HAS POSSIBLY CONDUCTED FROM 23SBZ ON 14 DECEMBER AtlD H5B6Z OH 17 DECEMBER IN THE VICINITY OF CUA BA LAI <2B-17N U6-34E, XH 4334) . TllE COMMUNICATIONS ALSO CONTAINED INDICATIONS THAT 1 NBI8~AND THE PROBABLE PGM T-122 OF DIVISION 7 INVOLVED IN THE "TWO DAY OPERATION ." AT ~B38Z Otl 16 DECEMBER, THE NFHQ INSTRUCTED tUfl85::.To PAY ATTENTION TO TIDE CALCULATIOr{S AHD TllE MONSOONS HHEN DEPARTING C l.!A LACH GIANG C2B-BIH 186-I2E, XII 2421 > AHD PASSING PRO DA Bl Y CUA-· DA LAT, ( 2/'Ql/VCN/Rl447-68, 22S62JfZ. 2/Ql7.VCN/Rl448-68, 22S845Z) (3! ~ftEf 3~6K!> D. OTHER . ~EVELDPMENTS CIVIL COMMUNICATIDHS THE TIMES INVOLVED IN TRANSPORTING MATERIALS FROM VI HH LINH Cl7-83N 187-SIE, YD 1586) TD VlNH~ NGHE AN PROVINCE, PRESUMABLY BY TRUCK, WERE REVEALED IN A 29 DECEMBER MESSAGE FROM THE NGHE AN DEPARTMENT OF POSTS AND TELECOMMUNICATIONS TO DEPARTMENTS OF POSTS AND TELECOMMUNICATIONS IN VINH LitlH, QUANG BIHH, AND HA TINH. THE TIMES LISTED IN THE MESSAGE WERE FOR OVERLAND TRIPS VIA ROUTE 1 AtlD ARE AS FOLLOWS ARRIVE DEPART VINH LINH: Jf788G LE THUY DISTRICT 88150 QUAtlG tlINll DISTRICT 8938G DO NO HOI 11S8G DO TRACH <17-35N 1Jf6-32E, XE 6345> 1245G BAC TRACH CUHLOCATED> 14880 QUANG TRACH < 18-55N 185-32E, 168BG HF 5792) KY AtlH <I8-S5N 186-18E, 18380 XE 3799) HA TINH Cl8-2BN IS5-55E, 218SG HF 9627> MINH LOC <UHLOCATED) 23880 NOHI XUAN Cl8.- -l9N 185-46E, Sif25G HF 8ff63) VIllH 8238G C2X/Gll/VCY/Tl27-68, 211428Z> (9EeRET "9RA¥l III. LAOS A. LAOTIAN MILITARY SITUATIUN THE FOLLDHING SUMMAR Y IS ~ASED ON COMMUNIST AND ROYAL LAOTIAtl ARMY <RLA> MESSAGES AVAILABLE DURING THE PAST 24 HOURS. ON 19 DECEMBER, THE PATHET LAO HEHS AGENCY HANOI REPORTED THAT THE PATHET LAO FORCES WOULD OBSERVE, ALONG WITH THE NATIONAL LIBERATION FRONT IN VIETNAM, A HEEK OF SOLIDARITY FROM 2Jf TO 26 DECEMBER. THE REPORT FURTHER STATED THAT INCREASED FIGHTING IN LAUS HOULD OCCUR DURING THIS TIME. C2/G3/lSG /Rll5-68. 2Jf8838ZJ NORTHERN LAOS OH 21 DECEMBER, AU UNIDENTIFIED SUBORDINATE CM2164> - 0F THE MAJOR HVA HEADQUARTERS, SAM NEUA, WAS

_NOTED IN THE VICUUTY OF 28-l'iN Ul3-39E <Ull 58937 5). THIS RErRESEtl1 S A MOVE OF APPROXIMATELY 15 KILOMETERS IN AN EASTERLY DIRECTION FROM ITS LAST NOTED LOCATION OF 2.11-13,N 1S3-31E <UH 451378>. ON 21if DECEMBER, AH UHIDEtHIFIED SUBORDINATE CM4S73l OF NVA HEADQUARTE RS KHl\HG klfAY, AND A SUBSCRIBER TO TllE MAJOR NVA HEADQUARTERS, SAM UEUA WATCH FACILITY WAS INITIALLY LOCATED IN THE VICINITY OF 21-18N 1S3-44E CUH 689285). AN UNIDENTIFIED SUBORD!UAJE . CM428~> OF THE KHANO KHAY AREA HEADQUARTERS AND THE MAJOR NVA HEADQUARTERS SAM NE UA HAS INITIALLY LOCATED BY SIGINT WITHIN lifll METERS OF 19-32N IB3-16E (UG 113591> OH -• l9P SE~'ET YHBRA

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22 DECEMBER. A 22 DECEMBER MESSAGE FROM TH E NVA 4TH BATTALIOH TD THE NVA 2D REGIMENT, OPERATING IN THE BAN BAN CI9-38N lf3-33E, UG 4872) AREA OF LAOS, INFORMED THE COMMANDER THA T PLATOONS WERE DEPLOYED AT SEUI VIET <UNLOCATED>, BAN THA CI9-4SN IJ3-3SE, UG 5283) AND . NA LONG <19-41N lff3-35E, UG 5275), HITH A CD MPANY HEADQUARTERS AT BAN THA. <2,~3,VCM,TJ93-68) XXHH 9dl NHUN

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.. MC 3582351 ZKZK pp-~RNI DE ·p· 232if &Z FM DIRNSA TO ·OS.CARI'~.· -=RM TANG·o ' ZEM . . .. ~FCIION VEN XXMMENPff7-TB23128 31 . 317-68 NATION.AL SECURlTY. A GENCY SOUTHEAST Uu srn1tn SUMM"RY xxccAH -~lHIFIED SUBORDINATE H2iJ3tf->- OF THE PATHET LAO XIENG KHOUA NG AREA HQS 0.i:JIJIR>· "<l9-32N ll3-19E, UG 2261> WAS INITIALLY LOCATED AT 19-ZlN lif3-B3E <TO 946428) ON 21 ff~~~=~Ri11~nE~ 05~Trn~6J~ ~~1'-~~9N~'~nr-~~. K~H~U~~s s~S¥r.~~r;srAg~ ~W'~~ ~HAY ECEMBER, THE CONTROL OF THE BROADCAST FACILITY.JMififl-) WHICH SERVES THE ttVA TCHEPONE AREA HEADQUARTERS, REAPPEARED IH COMMUNICATIOHS WIT It ITS SUBORDINATE SUBSCRIBERS AT WHICH TIME CO"TROL WAS LOCATED AT 16-43tt 1S5-S9E lXD 136481>. THE LAST NOTED APPEARANCE OF THIS DRDADC AST FACILITY HAS 8 DECEMBER. ALSO OH 21 DECEMBER, AN UNIDENTIFIED SUBORDINATE .CMflCJ.5)' OF THE NVA HEADQUARTERS TCHEPONE AREA WAS L OCATED AT 15-28N U6-18E CXC 395187), APPROXIMATELY 62 KILOMETERS SOUTH-SOUTHEAST OF ITS 16 NOVEMBER LOCATION OF 16-llH lff6-11E CXC f~fN~~g~fA~~0~2G~~fi~M~~~· o:~E~~rnE~~I~f,5gu:~eg~g~~~~E/~~~~~fy?F Ti~E NVA 559TH UHIDENTIFIED SUBORDINATE PASSED TEN MESSA-OES TO THE PROBABLE HQ, BIHH TRAM <BT> 5 AND INDICATED THAT AN ADDITIONAL 12 MESS AGES ~IOULD BE SENT LATER THAT DAY. A PREVIOUS HIGH DF 12 MESSAGES TO HQ, BT 5 HAS OBSERVED OH !if DECEMBER. TllE UNIDENTIFIED SUBORDINATE 1MSS14~~AS LPCATED.WEST OF ROUTE 96 HEAR 14-52N 187-HE CYB 39547.n ON 29 JUL-Y. C5EeRET 5PBKE> MEAUHHILE, RLA COMMUNICATIONS I N KHAMMOUANE PROVINCE, MILITARY REGtON <MR> 3, REPORT TIMT THE RLA POSITION AT KENG PE, WE 1618 Cl7-16N 1S5-if7E> HAS "HEAVILY" ATTACKED BY AU UNDISCLOSED NUMBER OF COMMUNISTS -OH THE NIGHT OF 22 DECEMBER. REPORTEDLY, HU COMMUNICATIONS HAVE BEEN MADE WITH THE POSITION SI NCE TllE A HACK. TO THE SOUTH IN MR 4, A PATHET LAO <PL)/NVA BATTALION OF 581 MEN HAS DEPLOYED 2S KM SOUTHEAST OF BAN SOU KHOUNA (14-38N 185-48E, WB 8618), ACCORDING TO A 21 DECEMBER RLA MESSAGE. IN SEDONEPROVINCE, 3 PLl'HVA COMPANIES REPORTEDLY MOVED 10 AN AREA 24 KM S OUMST OF PHIA FAY <14-48N UfS-57E, XB 1235) ON 19 DECEMBER.~ . ' (2 lSMl'Tl485-68, 221f28Z. 21'GDl'LSMIT1127-68, 23874SZJ (Sl!:Cftl!:T sroKI!: ) B. RE TIONS OF AIR ACTIVITY THE F~L(OHING IS A CHRONULOGICA( LISTING OF AIR

_STRIKES AND RECONNAISSANCE ACTIVITY NOTED IN GDRSt559TH TRAttSPORTATIOU GROUP COMMUNICATIONS. DATE/TIME AIRCRAFT TARGET ORDNANCE/REMARKS OF ACTIVITY DEC EMBER 17/22186 AND F4 (6) A PASS AND BOMBS (2 STICKS OF 22280 HEW FORD AT FRAGMENTARY AND 4 TA LE STICKS OF HE> l81'8488G B-26 C2> KM 7 BOMBS <2 STICKS OF HE> 8615-16250 OV-1 <l>, A FORD AT TA BOMBS C3 STICKS OF HE> F-181 Cl>, AUD F4 (2) 1'1711-S735G F-191 (2), A PASS BOMBS (4 STICKS OF HE> F-Iif5 <2>, AND OV-1 (1) /98350 F-115 (4) A PASS BOMBS Cl STICK OF HE> /88580 F-lSS (2) A PASS BOMBS <2 STICKS OF HE> /89850 F4 94> A NEH FORD BOMBS C4 STICKS OF HE> l'S92ifG F4 (4)

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CABLE BRIDGE BOMBS C4 STICKS OF HE> 119350 F 4 CI>, AC-1 COC MAC RECONNAISSAHCE Cl), AND OV-1 Cl> /llSJG OV-1 Cl), KM 15 B OMBS C2 STICKS OF HE> AC-1 <2> AND F-4 <2> 1lJ.SG F4 Cl> ---- RECONNAISSANCE 19/ 19SSO B-26K <2> COC MAC RECONNAISSANCE 119150 F4 C2) FORD AT KA BOMBS Cl STICK OF HE> XXHH 9Sf HNNN

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~rn-::=E~8~~~~B.~~4~~~llj~~XMMENP88-TB23128 JI o· ··... Js7-68 NATIONAL SECURITY AGENC OUTHEAST ASIA SIGINT SUMMARY xxcc roe 4 G F4 ( l i TA LE RECON NAISSANCE /Jf64JfG A-3 ---- FIRED AT BY 4TH COMPANY 1Jf655G ---- KM 15 BOMBS C6 STICKS OF HE> /l72JfG ---- A FORD BOMBS tHE> IS82SO "R" <POSSIBLY CDC MAC RECONNAISSANCE R F-4) /lllSG F4 C4J KM 14 AT BOMBS <4 STICKS OF HE> TA LE 111--0 F4 Cl) - --- RECONNAISSANCE /llJf~-13JfJfG OV-1 Cl) CDC MAC RECONNAISSANCE /17350 F4 Cl) A PASS, FORD, PHOTO- RECONNAISSANCE BRIDGE AT TA LE tl83Jf0 F4 Cl> ---- FIRED AT BY lST COMPANY Cl5 ROUNDS EXPENDED> /l9SJfG B-26K CZ> COC MAC RECONNAIS SAtlCE 119110 F4.S C2) A FORD AT KA BOMBS Cl STICK OF llE) TDC/---- F4 (2) AND --- - ---- A4D.S C4) 1---- OV-1 Cl) AND ---- "ASSEMBLED" AD6 (2) /---­F4 (Z) ---- BOMBS 2VJ9'J8G- F4. s (2) KA TDC AREA RECONNAISSAllCE ueeo AHO OV-1 Cl) 119310 f4 (2) KM 19 BOMBS Cl STICK Of HE> /893SG F4 <2> FORD AT TA LE BOMBS Cl SALVO OF HE> /---- RF 4 C l> BA KHA <PRO- FIRED AT BY THO GUNS Of BABLY BAN KHA> 4TH COMPANY C22 ROUNDS EXPENDED> THE SHOOTDOHN OF THREE U.S. AIRCRAFT HAS REFLECTED IN 559TH TRANSPORTATION GROUP COMMUNICATIONS ON 21 DECEMBER. THE ACCOUNT HAS OBSERVED IN A MESSAGE POSSIBLY FROM AN ELEMENT AT TllE 559TH GROUP TO THO ANTIAIRCRAFT BATTALIONS, THE 18 TH AND 220, AND THO ENGINEER BATTALIONS, THE 330 AND THE 77TH. THE SHOOTDOHNS REPORTEDLY TOOK PLACE AS FOLLOWS AT Jfll5G POSSIBLY ON 21 DECEMBER THE 34TH BATTALION OF BltlH TRAM 33 (LOCATED ON ROUTE 9 BETWEEN MUONG PHINE 16-32N 1J6-S2E, XD 1SZ9 AND NA BO, 16-43N 1S6- lSE, XD 2448) SHOT DOHN AN A6. LATER, AT 858JG, AN UNIDENTIFIED AIRCRAFT ATTEMPTED TO

:RESCUE THE DOWNED PILOT AND THE 30 COMPANY, 34TH BATTALION HAS SUCCESSFUL IN SHOOTING IT DOHN. AT 812SG, APPARENTLY THAT SAME DAY, THE 18TH BATTALION OF BINH TRAM 32 CUNLOCATED, RESPON SIBLE FOR ROUTES 911 AND 912 IN LAOS) SHOT DOHN ONE l-26K. THESE ACCOUNTS HERE INCLUDED IN A CONGRATULATORY MESSAGE AND ACCORDINGLY MOR ~ETAILED INFORMATION DH THE ACTIVITY NAS NOT GIVEN. +(~5Ef"f6;HR'fii-E1+-9PBKE'J ( 2/.011/V.C . 11 Z53-68, 22Z359Z > IV. CAMBODIA MIL IT ARY S ITUA TI ON THE~ ~OLLOHING SITUAT N SUMMARY IS BASED ON CAMBODIAN MESSAGES MADE AVAILABLE DURING THE PAST 24 HOURS. MILITARY REGION 1 AN AIRSPACE VIOLATIOll OCCURRED OVER KOMPONO CHAM MILITARY SUBDIVISION <MSD) ON 21 DECEMBER. IN AN ALLEGED GROU"D

_VIOLATION, U .S,/ARVN FORCES FIRED MORTAR ROUtlDS INTO THE AREA OF BOS MON Cll-14N 185-53E, HT 9542), SVAY RIENG MSD, HOUNDING AT LEAST THO CAMBODIAN CIVILIANS, ACCORDING TO A 28 DECEMBER MESSAGE. PEAM MONTE! ClS-57" 1S5-3SE, HT 5511) ALSO HAS THE SCENE OF A REPORTED U.S./ARVN FIRIHG VIOLATIOH, ACCORDIHO TO AN 18 DECEffBER MESSAGE. XXHH 9Jf8 NNNN

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j ) MILITARY\REGION 2 A KHMER KROM, U.S.IA'RVN SOlDIER NAMED CHAO VOHG REPORTEDLY \\!. DEFECTED \JO CAMBODIA IO lAKEO MSD ON l 6 DECEMBER. ALSO IN MR 2 SECURITY , MEASURES WERE ORDERED FOR A VISlT BETHEEH VICE .ADMIRAL GRI-FFIH AHO THE GOVERHOR j OF \SIHANOUKVILLE, ACC 08DING TO A 16 DECEMBER MESSAGE. COLLATERAL INFORMATIOH ~ . IDENTIFIEIJ. VIC~IRAL GRIFFIN AS THE DEPUTY. COMMANDER OF THE BRITISH FAR EA ( STERN FLEET. ( 2 C:EYIT1393"."'68, 221429Z. CE~FIT137"'."68, 221439Z> MILITARY REGION ~ s ONE AIR VI ·- ·. f NAS REPORTED IN MR s IN .mrnuu. l:K

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