COMMUNIST UNITS PARTICIPATING IN ATTACKS DURING THE TET OFFENSIVE

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Approved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 3.5(c) EO 13526 3.3(h)(2) EO 13526 3.5(c) DIRECTORATE OF INTELLIGENCE Intelligence Memorandum Communist Units Participating in Attacks During the Tet Offensive 30 January Through 13 February 1968 DOCCEitif LERARY FILE COPY DO NOT DESTROY Approved for Release: 2019/01/22 CO2912257 � et Copy No . 75 ER IM 68-23 February 1968 Approved for Release: 2019/01/22 CO2912257 WARNING This document contains information affecting the national defense of the United States, within the meaning of Title 18, sections 793 and 794, of the US Code, as amended. Its transmission or revelation of its contents to or re- ceipt by an unauthorized person is prohibited by law. GROUP EXCLUDED FROM AUTOMATIC DCPANOIIADIND AND DECLAPISIEICATION Approved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 SE CENTRAL INTELLIGENCE AGENCY Directorate of Intelligence 21 February 1968 INTELLIGENCE MEMORANDUM Communist Units Participating in Attacks During the Tet Offensive 30 January Through 13 February 1968 Summary A review of field reporting since the start of the current Communist offensive indicates that approximately 58,000 Communist main and local forces were committed in attacks on urban areas and military installations through 13 February. (For detailed data on forces available and engaged in the Tet offensive, see Appendixes A and B.) Of this total, about 37 percent were North Viet- namese Army (NVA) troops and another 29 percent were Viet Cong (VC) main force troops. The remaining 34 percent consisted of VC local forces which had been reinforced for the attacks by the upgrading of local guerrillas. On the basis of MACV's latest order of battle of 115,000 men, the Communists would appear to have committed about 50 percent of their regular forces to the attacks. If the reported losses of 32,500 killed in action and 5,500 detained applied solely to the VC/NVA regular forces, the Communists would have lost more than 65 percent of the forces committed to the Tet offensive. This would have been a devas- tating blow. However, there are a number of pieces of evidence which suggest that such an interpretation would overstate the Communist manpower drain. First of all, VC/NVA forces participating in the offensive were augmented by numbers of Note: This memorandum was produced by CIA. It was prepared by the Office of Economic Research with the assistance of the Vietnamese Affairs Staff and coordinated with the Office of Current Intelligence. It analyzes developments reported through 13 February 1968. SF.Crir Approved for Release: 2019/01/22 CO2912257 3.5(c) 3.5(c) Approved for Release: 2019/01/22 CO2912257 guerrillas operating in independent units or integrated into local force units. Second, there was extensive VC activity to raise new recruits. Third, casualties included laborers conscripted to move VC supplies, as well as a number of civilians in densely populated areas taken under attack. Almost certainly the rate of casualties among new and relatively untrained forces was higher than among hard-core troops. In summary, a number of factors suggest that the VC/NVA losses, although high, are not as serious as first believed. Most recently, the enemy has been taking advantage of his greater control of the countryside to accelerate recruiting among the rural population. All of these develop- ments make it difficult to assess the current enemy manpower situation with any accuracy. 2 Approved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 Introduction 1. The intensity of the Communist Tet offensive is reflected in the fact that 39 of South Vietnam's 44 provincial capitals, plus the autonomous cities of Saigon and Da Nang, were attacked. All of them were subjected to artillery and mortar fire or ground assault, and most of them were hit within the first three days. At least 35 of these capitals and the two autonomous cities were physically pene- trated by Communist armed forces. In addition, at least 71 district capitals also were attacked. (For a list of the provincial and district capitals attacked, see Appendix B.) The offensive was aimed at civilian centers of authority, as well as at military installations such as base camps, airfields, and logistical facilities. 2. The Tet offensive is a part of the winter- spring campaign which the Communists have described as being the "decisive" phase of the war. As a maximum objective, the Communists hoped the campaign would culminate in a geperal uprising which would involve severe defeats for Allied military forces and would lead to US withdrawal from South Vietnam. At the same time, they also hoped that large-scale political agitation combined with attacks on urban areas would result in the collapse of the South Vietnamese government and create conditions favor- able for a settlement and the establishment of a coalition government on Communist terms. 3. The Tet offensive also has several more immediate tactical objectives: (1) to disperse and tie down Allied military units in defensive positions, (2) to disrupt South Vietnamese centers of political authority, and (3) to demonstrate the inability of the South Vietnamese government to protect the population. In addition, the Communists may be attempting to gain greater control over a larger segment of the rural population by disrupting or destroying the pacification program while Allied forces are diverted to the protection of urban areas. 4. Although the Communists have not accomplished as much as they had hoped in this offensive, they have dealt a severe psychological blow to an urban population, accustomed to relative security from the active phase of the war. The Vietnamese 3 SE Approved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 populace appears to be dismayed at the apparent ease with which the Communists were able to enter the cities in strength and attack key installations. Large portions of some cities, including Hue, My Tho, and Ban Me Thuot, have been destroyed, and the increasing number of refugees and homeless created by the attacks have imposed substantial new economic and social burdens on an already heavily burdened government.* The Communists also inflicted considerable damage on Allied military installations, in addition to tying down a number of Allied military forces to restoring security in urban areas. 5. Despite these achievements, the Communists failed to organize any significant support from the general populace. Moreover, the offensive has been waged at a considerable cost in terms of losses of men and weapons.** The importance of the loss of men lies less in the numbers killed, which are believed to be overstated, than it does in the caliber of the troops lost. Although guerrillas, recently infiltrated personnel, and untrained new recruits probably account for many of the casualties, the identificatiun of units taking part in the assaults indicates that a considerable number of skilled, well-trained VC/NVA infantry, sappers, and special-action troops also were lost. Forces Committed to the Tet Offensive 6. A review of field reporting since the start of the Communist offensive, although still incomplete, provides sufficient information to identify most of the enemy units directly partici- pating in the attacks against urban areas and military installations.*** These units are listed in Appendix B, which shows that as of 13 February (Saigon time), approximately 58,000 Communist main and local forces had been actively committed in * See ER IM 68-203 The Effects of the Tet Offensive on the Economy of South Vietnam as of 15 February 1968, 16 February 1968, SECRET/NO FOREIGN DISSEM. ** For additional information on enemy losses, see paragraph 9 and Appendix B. *** This memorandum does not include attacks on military installations in the Khe Sanh area. - 4 Pcel pproved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 the Tet attacks. The number of Communist forces committed to reserves and defensive positions for the Tet offensive is not considered in this memo- randum. 7. About 22,0Q0, or 37 percent of the 58,000 actively committed, have been identified as North Vietnamese troops. All of these troops were located in the I and II Corps areas, where they accounted for 60 to 65 percent of the attacking forces. Nearly 17,000, or about 45 percent of the 36,000 VC forces offensively engaged, were main force troops, the remainder being local force troops. In addition, it is believed that a con- siderable portion of the guerrilla forces, which were built up in preparation for the current offensive, directly participated in the attacks.* Some of the guerrillas were upgraded to EilVC main and local force units up to full order-of- battle strength and, therefore, are believed counted in the total estimate of VC/NVA forces. However, the figure of 58,000 is understated to the extent that certain main and local force units and independent guerrilla units which participated in the attacks have not been identified. Evidence also indicates that the attacking units contained a number of new, inexperienced recruits and that civilians were impressed to provide support to -- these units. 8. On the basis of MACV's order of battle of 31 December 1967, which lists 115,000 VC/NVA maneuver and combat-support troops for the entire country, the Communists appear to have committed about 50 percent of their main and local forces to the attacks. At least 7 percent of the troops tentatively identified in the attacks, however, are not listed in MACV's order of battle. (For the methodology used in estimating these troops, see Appendix C.) These units are not as yet carried in the order of battle because they are newly formed, recently infiltrated, or previously unidentified.** Examples of these three include the 4 A separate OER report on the role of the guer- rillas in the Tet offensive is being prepared. ** MACV's acceptance and rejection criteria for Communist units, particularly for newly infiltrated units, tend to minimize the number of units and soldiers listed for any [footnote continued on p. 6] - 5 - SEC pproved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 S T 510th and 511th VC local force battalions, the 31st regiment of the 341st NVA division, and the Nha Trang Municipal Unit. 9. More than 32,500 of the attacking forces reportedly had been killed and another 5,500 detained as of 13 February. The many uncertainties attached to these data make them extremely difficult to evaluate, particularly in terms of their impact on enemy strength. The compilation of field report- ing on enemy forces committed in the III Corps \area, for example (see Table 4), falls far short of the numbers reported killed and detained (see Table 5). Even allowing for incompleteness in the identification of units, the implied loss rate of the data presently available for the III Corps area imply a loss rate far in excess of that which is reasonably possible. It seems clear, therefore, that the number of enemy losses should not be compared with the number of main and local forces listed in the order of battle or the numbers en- gaged in the attacks. There is sufficient evidence to support a judgment that the enemy casualties include (1) guerrillas operating in independent guerrilla units; (2) guerrillas recently upgraded to main and local force units; (3) new recruits; (4) laborers conscripted to move supplies for the attacks; and (5) civilians in densely populated areas taken under attack. point in time. MACV's order of battle of 31 December 1967 indicates a decline in the size of the main and local forces from the order of battle of 31 October. Evidence suggests, however, that the Communists actually were in,the process of increasing the size of their regular units during this period in prep- aration for the Tet offensive. -6 SE pproved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 SEC APPENDIX A Forces Available and Engaged in the TET Offensive (30 January-13 February 1968) SE Approved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 SE Table 1 Countrywide Data on the Tet Offensive Friendly force available 1)12i2222 US forces 2/ 490,700 (153,600)12/ Third-nation forces 60,700 (33,800)12/ South Vietnamese forces .2/ 635,300 NVA VC Communist forces available 1/ 224 ,500 55,600. 168,900 Maneuver55,200 Combat support 45,500 10,000 4,500 Administrative service 100 37,600 Guerrilla 71,600 Estimated Communist main and local forces identified as attacking urban areas and military installa- tions 57,600 North Vietnamese 21,500 Viet Cong 36,100 Main force 16,800 Local force 19,300 Casualties and weapons losses 2/ South Third-Nation Casualties US Vietnamese Forces Total Communist Killed in action 1,073 2,245 65 3,383 32,549 Wounded in action 5,488 8,373 259 14,120 N.A. Detained 5,528 Enemy weapons losses Individual Crew served 7,967 1,227 a. As of 29 January 1968. b. Numbers in parentheses represent ground combat forces. c. Preliminary figures; as of 1 January 1968. Includes RF/PF forces. d. As reported in MACV Order of Battle Summar, 1 November through 31 December 1967. e. As reported by MACV as of 13 February 1968 (Saigon time). - 8 - Approved for Release: 2019/01/22 CO2912257 pproved for Release: 2019/01/22 CO2912257 Table 2 Friendly Forces Available Total I Corps II Corps III Corps IV Corps US forces 2/ 490,700, (153,600) y 138,700 (51,000) 148,400 (39,000) 189,200 (49,500) 14,400 (4,loo) Army 327,000 (115,200) 33,600 (22,600) 118,000 (39,000) 166,100 (49,500) 9,300 (4,100) Marine Corps 74,600 (38,400) 74,500 (38,400) Negl. 100 Navy/Coast Guard 32,600 23,400 2,000 3,800 3,400 Air Force 56,500 7,200 28,400 19,200 1,700 Third-nation forces 6.2222 (33,8040 6,200 (3,800) 39,000 (24,400 15,500 (5,600) South Vietnamese forces s/ 635,300 99,700 142,200 217,200 176,200 Regular 340,200 55,400 70,500 152,500 61,800 RF/PF 295,100 44,300 71,700 64,700 114,400 Total 1,186,700 21414,600 329,600 421,900 190,600 a. As of 29 January 1968. b. Numbers in parentheses represent ground combat forces. c. Preliminary figures; as of 1 January 1968. LSZZ1.6Z00 ZZ/1.0/61.0Z :aseaia JOI penaidd\of Table 3 Communist Forces Available Ri Total I Corps II Corps III Corps IV Corps 224.500 63,200 NVA VC 57,500 NVA VC 54,100 NVA VC 49,700 VC 26,900 36,300 1/,/22 39,800 11,000 43,100 49,700 Maneuver 100,700 21,900 10,600 14,100 10,100 9,500 17,100 17,400 Combat support 14,500 5,000 700 3,500 800 1,500 2,200 800 Administrative service 37,700 7,600 loo 51500 16,200 81300 Guerrillas T1,600 17,400 23,400 7,600 23,200 As reported in MACV's Mbnthly Order of Battle Summary, 1 November through 31 December 1967. :aseala oj panaiddy Approved for Release: 2019/01/22 CO2912257 Table 4 Estimated Communist Main and Local Forces Identified as Attacking Urban Areas and Military Installations North Vietnamese Total I Corps II Corps III Corps IV Corps 21,500 9,800 11,700 Viet Cong 36,100 6,200 6,200 10,300 13,400 Main ILorce 16,800 2,400 3,900 6,000 4,500 Local force 19,300 3,800 2/ 2,300 4,300 8,900 Total ,57,600 16 000 __.2....__ 17,900 10,300 13,400 a. Including 1,500 unidentified troops, believed to be Viet Cong local force. �cs �cs S ) CD -h 0 CD CD (/) CD) CD Co cD ) 0 CD ) Co ) ) (-71 LSZZ1.6Z00 ZZ/1.0/61.0Z :aseaia Joi pancuddV Table 5 Casualties and Weapons Losses 2/ Total I Corps II Corps III Corps IV Corps Total friendly casualties Killed in action Wounded in action United States 3,383 1,186 506 1,137 554 14,120 4,788 1,788 ',370 2,174 Killed in action 1,073 524 120 346 83 Wounded in action 5,488 2,686 605 1,787 410 South Vietnamese Killed in action 2,245 638 363 775 469 Wounded in action 8,373 1,986 1,132 3,491 1,764 Third-nation forces Killed in action 65 24 23 16 2 Wounded in action 259 116 51 92 Communist casualties Killed in action 32,549 10,592 5,539 11,195 5,223 Detained 5,528 2,255 1,693 800 78o Enemy weaponslosses Individual 7,967 2,049 1,672 2,653 1,593 Crew served 1,227 496 177 315 239 a. As reported by MACV as of 13 February 1968 (Saigon time LSZZ1.6Z00 ZZ/1.0/61.0Z :aseaia Joi pancuddV Approved for Release: 2019/01/22 CO2912257 SE APPENDIX B List of Provincial and District Capitals Attacked - 13 - SE Approved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 S T I Corps Cities Attacked, Communist Units Identified, and Their Strengths, by Province 2/ City Communist Units Identified. in Attacks Estimated in Province Strength Quang Tri Quang Tri City y 812th NVA Begt. 2,600 Cam Lo 2/ 1st Bn, 803rd NVA Regt. 500 Hai Lang 2/ 1st Bn, 270th Regt. 350 Mai Linh 2/ 5th NVA Regt. 1,340 Trieu Phong 2/ 27th Ind. INA Bn. 300 3 U/I Bns. 1,200 Hue City)/ Phu Loc c Total Thua Thien 62 190 Hue Municipal Unit (Hue Sapper Bn.) 225 800th VC Bn, 6th NVA Regt. 300 4th NVA Regt. Ind. 2,000 Total 2,525 Quang Nam Da Nang (Auton City) Hoi An City y R-20 VC LF Bn. 400 Dien Ban 2/ V-25 VC LF Bn. 400 Hteu Nhon 2/ 3rd Bn, 31st Regt. 341 NVA Div. 500 Duy Xuye Hoa yang c by 3 U/I Co's - est. 300 Poss els GK 31 AA Bn NVA Ad Bn. 1400 Total - 14 - S T Approved for Release: 2019/01/22 CO2912257 2,000 Approved for Release: 2019/01/22 CO2912257 � e I Corps Cities Attacked, Communist Units Identified, and Their Strengths, by Province .9./ (Continued) City Tam Ky City IV Communist Units Identified in Attacks Estimated in Province Strength Quang Tin 72nd VC LF Bn. 21st NVA Regt. 70th VC MF Bn. V-12 VC LF Co. V-13 VC LF Co. V-16 VC LF Co. 74th VC LF Co. 78th VC LF Co. F. 105 VC LF Co. 300 1,500 400 500 Total 2222 Quang Ngai Quang Ngai City 1/ 48th VC LF Bn 400 Binh Son 2/ Son Tinh 2/ Nghia Hanh 2/ 401st Sap Reg. & Sub Bns 1,700 Mo Duc 2/ 406 Sap Bn. (450) 120th Mont. Bn. (400) 107th AA Bn. (400) 405th Sap Bn. (450) 81st VC LF Bn. 360 Total 2,1460 --- a. Identifies all province and district towns reported attacked during the Tet offensive. Communist units identified in the attacks do not necessarily correspond to the cities and towns as listed. b. Province capital. c. District capital. - 15 - SE Approved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 SE II Corps Cities Attacked, Communist Units Identified, and Their Strengths, by Province 2/ City Communist Units Identified in Attacks in Province Estimated Strength Kontum Kontum City 12/ 4th Bn, 24th NVA Regt. 435 Dak To 2/ 6th Bn, 24th NVA .Regt. 335 66th NVA Regt. 1,560 40th Arty Regt. 1,000 2nd Bn, 174th NVA Regt. 220 � Total Pleiku 3,550, Pleiku City 12/ 407th VC Sap Da 500 Le Trung 2/ H15 VC LF .Bn 400 Thanh An 2/ 408th VC Sap Bn 360 4th Bn, 95B NVA Regt. 475 5th Bn, 95B NVA Regt. 375 Hq & Spt Bn NVA Regt. 500 32nd NVA Regt. 1,600 200th VC Arty Bn 400 Total 42610 --- Dalat City 12/ Tuyen Duc C-809 VC LF Co. I 210 c-810 vc LF Co. C-610 VC LF Co. 2 Co's, 145th NVA Regt. 150 Total 360 - 16 - SE Approved for Release: 2019/01/22 CO2912257 AWA Approved for Release: 2019/01/22 CO2912257 II Corps Corps Cities Attacked, Communist Units Identified, and Their Strengths, by Province 2/ (Continued) City Qui Nhon City 12/ Phu Cat pi An Nhon y Phy My c Tuy Phuoc 2/ Hoai Nhon Ban Me Thuot City 12/ Buon Ho 2/ Thuan Hieuy Lac Thien c Tuy Hoa Cityi12/ H1*1 Xuong c Communist Units Identified in Attacks in Province Binh Dinh 36th Sap Bn E 2 B VC LF Bn 36B Sap Bn 18th NVA Regt. Total Darlac 33rd NVA Regt. E301 VC LF Bn 95th NVA Regt. H-5 VC LF Bn 381st VC Sap Bn 86th VC LF Bn 88th VC LF Bn 181st Mont. Bn, 95th NVA 481st VC Sap Bn Total Phu Yen Estimated Strength 2)4-5 200 250 1,250 1,924-5 860 14.70 1,275 45 200 300 300 Regt, VC 300 200 5th Bn, 95th NVA Regt. 4th Bn, 95th NVA Regt. 30th VC Bn U/I El-MS, 91st NVA Regt. 85th VC Bn & 1 NVA Pit. Total - 17 - SE pproved for Release: 2019/01/22 CO2912257 3, 9 50 280 260 200 200 300 1,214-0 1�111111111111k Approved for Release: 2019/01/22 CO2912257 SE II Corps Cities Attacked, Communist Units Identified), and Their Strengths, by Province 2/ (Continued) City Communist' Units Identified in Attacks Estimated in Province Strength Khanh Hoa Nha Trang City 12/ 7th Bn, 18B NVA Regt. 205 Ninh Hoay 8th Bn, 18B NVA Regt. 290 Cam Lam c 9t1LBn, 18B NVA Regt. 270 Nha Trang Municipal Unit 20 1(90 VC Sap Co. 35 95th NVA Arty Bn. 150 1(89 VC Sap Co. 120 T86th VC Sap Co. 120 1(91 VC Sap Co. 35 T88 VC Sap Co. (Recon) 120 Total 1,365 Binh Thuan Phan Thiet City12/ 1..82 VC LF PL. 400 Thien Giao 2/ 840 VC MF Bn. 250 430 VC LF Co. 50 2 U/I LF Co's 120 Phan Rang 12/ Total 820 Ninh Thaan U/I LF Co. 100 a. Identifies all province and distri2t towns reported attacked during the Tet offensive. Communist units identified in the attacks as listed do not necessarily correspond to the cities and towns as listed. b. Province capital. c. District capital. - 18 - SE pproved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 SE III Corps Cities Attacked, Communist Units Identified, and Their Strengths, by Province 2/ City Communist Units Identified in Attacks Estimated in Province Strength Phuoc Long Phuoc Binh City y Song Be 2/ VC LF Co's Long Khanh 400 Xuan Loc City Y (H.4 PLT) VC LF 50 Dinh Quan 2/ Bien Hoa City I/ Due Tu 2/ Tan Uyen Long Thanh 2/ Tay Ninh City 12/ .Phu Khuong 2/ Hieu Thien 2/ Phuoc Ninh 2/ Bao Trai City y Cu Chi 2/ Due Hoa 2/ Due Hue 2/ An Loc City 12/ Loc Ninh 2/ Chon Thanh 2/ Bien Hoa 274th VC MF Regt. 275th VC MF Regt. Phu Loi VC LF Bn Dong Nal VC MF Bn 4th VC LF Bn Total Tay Ninh VC LF Dist. Co's Hau Nghia VC LF Co's Binh Long VC LF Co's - 19 - SE Approved for Release: 2019/01/22 CO2912257 1,650 1,650 1400 1400 200 14,300 1400 1400 100 Approved for Release: 2019/01/22 CO2912257 SE 'T III Corps Cities Attacked, Communist Units Identified, and Their Strengths, by Province 2/ (Continued) City Communist Units Identified in Attacks Estimated in Province Strength Binh Duong Phu Cuong City 12/ 273rd VC MF Regt. 1,750 Ben Cat 2/ 681 Bac Ben Cat LF Co 50 Phu Hoa 1/ i c Phu Giaoj/ Tr Tam Tan An City b/ Ben Luc 2/ Total Long An 317 Binh Luc Dist. LF Co Phuoc Tuy 1,800 80 100 180 Phuoc Le City 12/ C 41 Chan Duc LF Co. 85 Gia Dinh/Saigon. (Autonomous City) Gia Dinh City 12/ 269th VC MF Bn 300 Hoc Mon 2/ 2nd. VC LF Bn 270 Thu Duc 2/ 6th VC LF Bn 450 D-14 LF VC Bn 300 D-12 LF VC Bn 300 C-10-VC SAPPER Bn 350 D-16 LF VC Bn 420 1 Co. 3C6 MF Bn 150 Total 2 540 a. Identifies all province and district towns reported attacked during the Tet offensive. Communist units identified in the attacks as listed do not necessarily correspond to the cities and towns as listed. b. Province capital. c. District capital. - � 20 - SE pproved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 IV Corps Cities Attacked, Communist Units Identified, and Their Strengths, by Province fil City My Tho City 12/ Cal Be 2/ Cal Lay 2/ Communist Units Identified in Attacks Estimated in Province Strength Dinh Tuong 512th VC LF Bn. 550 514th VC LF Bn. 100 DT1 VC MF Regt. 1,500 207th VC MF Bn. 400 Total Go Cong 2,550 Go Cong City 11/ '514th VC LF Bn. 300 361st VC LF Bn. 300 Total Kien Hoa 600 Ben Tre City 12/ 516th VC MF Bn. 500 Mo Cay 2/ Binh Dai 2/ Vinh Binh Tra Vinh City12/ 503rd VC LF Co. 130 Cang Longy 505th VC LF Co. 120 Tieu Can c 525th VC LF Co. 8o 509th VC LF Bn. 250 501st VC LF Bn. 350 531st VC LF Bn. 300 527th VC LF Bn. 300 306th VC MF Bn. (Elms) Total - 21 - SE pproved for Release: 2019/01/2212257 11111.11.11111 1,530 Approved for Release: 2019/01/22 CO2912257 IV Corps Cities Attacked, Communist Units Identified, and Their Strengths, by Province fl./ (Continued) City Communist Units Identified in Attacks Estimated in Province Strength Vinh Long Vinh Long City 12/ 306th VC MF Bn. 500 Vung Liem 21 857th VC LF Bn. 200 Cho Lach c 308th VC MF Bn. 500 Tam Binh s/ Binh Minh 2/ Total 1,200 Chuong Thien Vi Thanh City12/ 3 VC LF Co's & 2 Pits. 330 Soc Trang City 12/ My Xuyen 2/ Thanh Tri 2/ Ba Xuyen 2 VC LF Co's 606 My Xuyen.LF Co. Tran Tri LF Co. Total Bac Lieu 200 loo 80 380 Vinh Loi City 12/ 5 vc LF Co's 420 An Xuyen Quan Long City12/ U Minh 11 VC LF Bn Cai Nuoc 2/ New 306th, VC LF Bn. 1,200 Phong Dinh Can Tho City b 303rd Bn, D2 VC MF Regt. 500 Phung Hiep c Tay Do VC LF Bn. 400 Phong Dien 2/ New Tay Do VC LF Bn. (AKA 307 Bn.) 400 Thuan Nhon 2/ 309th VC MF Bn. 590 Total 1,850 22 - SE pproved for Release: 2019/01/22 CO291225 Approved for Release: 2019/01/22 CO2912257 IV Corps Cities Attacked, Communist Units Identified, and Their Strengths, by Province -.92/ (Continued) City Communist Units Identified in Attacks Estimated in Province Strength Kien Giang Rach Gia City 12/ 2 Co's U,Minh 10 LP Bn. 400 Ha Tien 2/ Kien An 2/ Chau Phu City 12/ An Phu 2/ Tri Ton 2/ Cao Lanh City y Hong Ngu 2/ Chau Duc 512th VC LF Bn. 550 510th VC LF Bn. 500 511th VC LF Bn. 500 Total 1,550 Kien Phong U/I Elms, 502nd LF VC Bn. 300 Kien Tuong Moe Hao City 12/ 267th VC MB Bn. Sa Dec City 12/ Due Ton 2/ Duc Thanh 2/ Sa Dec 3 VC LF Co's 14-00 114.0 a. Identifies all province and district towns reported attacked during thm Tet offensive. Communist units identified in the attacks as listed do not necessarily correspond to the cities and towns as listed. b. Province capital. c. District aapital. - 23 - SE _Approved for Release: 2019/01/22 CO2912257 Approved for Release: 2019/01/22 CO2912257 APPENDIX C Methodolovy Used in Estimatin5 Strength of Communist Units Attacking Urban Areas and Military Installations 1. Estimates of enemy troop strengths deployed in the Tet offensive are based on the compilation of units identified /Although in most cases, reporting is fragmentary and obviously incomplete, efforts have been made to include as many positive identifications as possible, while attempting to preclude duplication of units and consequent double counting. 2. Enemy unit strengths were generally taken directly from the MACV Order of Battle Summary. In cases where identified units did not appear in the MACV order of battle, strengths were assigned on the ba.,-'s of similar units prevalent in the particular area, and/or estimated strength cited in field reporting. Unit code names, newly formed units, units not identified previously, or units dropped for lack of recent verification, explain differences in units listed and the MACV order of battle. 3. In several instances, the same units were identified as active in attacks in more than one area. This was resolved by splitting the estimate of the units total strength between areas or by listing the unit in only one area. - 25 - SE T pproved for Release: 2019/01/22 CO2912257