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Report of Flintlock Operation

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Report of Flintlock Operation Uto. ER J^IFTH AMPHIBIOUS FORCE REPORT OF FLINTLOCK OPERATION DOWNGRADED AT 3 YERR INTERVALS; RE©: L-Ui Uvii.W COMBINED ARMS RESEARCH LIBRARY FORT LEAVENWORTH, KS 3 1695 00839 7424 GENCENTPAC AG. Dato— 19 April 1944. HEADQUARTERS UNITED ^TATFg ARMY EOJ ircc rcLLXRAJL PACIFIC AREA ****** toasts mm mm mm AG 052/285 19 April 1944. SUBJECT: 'Transmittal Of Report of FlintJock Operation - 5thPhibFor. TO : Commandant, Command and General Staff School, Fort Leavenworth, Kansas. The inclosed report is forwarded for your information: For the Commanding General: 0. M. THOMPSONJ Colonel, AGD, 1 Incl: Adjutant General. Report of Flintlock Operation (Reg. No. 30) rrn.«n£ instroictGrs (pile Ho Sign Below _ _ Date ^air.s --- -55W?55i£T* naj Dun i/iB f ^ - )• ft UUidU Cii 'w -LASIIPikC * In^ ^st %- AG. PS&1P1 ft 19 Asfil 19AL. HEADQUARTERS jfe^TfS ARMVfPi## CENl^LfflJnC AREA APO 958 AG (£2/285 19 April 1944. SUBJECT! Transmittal of Keport of Flintlock Operation - 5tiPhibFor. TO i Commandant, Coomsnd end General Staff School, Fort Leavenworth, Kansas. The inclosed report is forwarded for your information: For the Commanding Generals O.'I. THOMPSON, Colonel, A CD, 1 IBCIJ Adjutant General. Keport of Flintlock Operation C^®S« No. 30} C5A/A16--3(3) . JOINT 'EXPEDITE jiRY-'FORCE- (TF 51) V. OFFICE OF TEE COMMANDER, - .' Serial 00189 U.S.S. ROCKY MOUNT, Flagship, February 25, 1944 f% $ T5 8 IT *<• . « h 3 Qfi i '1 '4J * ... K a;V ¥ ... J . ^ i ' From: Commander Joint Expeditionary Force, FLDTTLOCK, (Commander FIFTH Amphibious Force, U.S. Pacific Fleet); To: Commander in Chief, U. S. Pacific Fleet. Via: Commander Central Pacific Force, U, S. Pacific Fleet. • • ••• I' Subject: Report of Amphibious Operations for the capture of the MARSHALL ISLANDS (FLDTTLOCK and CATCKPOLE Operations). , • t . \ Reference: (a) C oiiiFIFTHPhibFor C ire. Ltr. No. 5AL-43. Enclosures: (A) Narrative of the Operation (with Code IIaide Chart). •••,•• - (B) /Intelligence Report. • (C) Resume.of Troop Landings and Shore Operations. (D) Operation of Control, Beach, and Shore Parties .(E). Naval and Air Bombardment and Beach Demol- - itions. / . F) Copy of Report of Commander Support Aircraft. G) Communications. (H) Employment of LVT's and DUIGT's by SEVENTH Infantry Division. I) Medical Report. •. J) Ship Loadings for FLINTL0C& Operations. (K) Important Recommendations. (A) ORGANIZATION OF TASK FORCE 51 1. This report includes a description of the major features of' the operations of Task Force 51, which was the Joint Expedit­ ionary Force assigned the task of capturing the 1IASSHALL ISLANDS; and the details of the operations of Task Force 52 (Southern Attack Force). 2. Task Force 51 comprised: | (a) Task Force 52 (Southern Attack Force), under Rear rAdmiral RJC. TUH7ER, U.S.N., charged with the capture of the 'southern half of KWAJ^LEIN Atoll. | (b) Task Forces J?|U(Northern Attack Force), under Rear I Admiral RcLc CCfiT0lM$ Jf .'tl cBarged* l&iyi the capture of the I northern, half Atoll\ ?<% a? flj- C5A/A;fe3(3) Serial 001SQ' Subject Report of Amphibious Oj-jerations for the capture of the L'JJ£EALL I3LALTDS (FLINTLOCK and CATCEPOLE Operations) 0 (c) Task Group 51.1, (Expeditionary Force Reserve Group), carrying the'Corps Reserve of troops, under Captain D»W* LOOMIS, U.S.N; (d) Task Group 51.2 (MATURO Attack Group, under Rear Admiral HILL, U.S.IT., charged with the capture of MA3TJR0 Atoll; ' * • (e) Task Groups 51.3 to 51.9, transporting the Garrison Forces to IS/AJALEIN.and HAJURO Atolls; T (f) Task Group 51.11 (ENIW^TOK Expeditionary Group) under Rear Admiral H»W. HILL, U.S.1I,, charged with, the capture of ENH7ET0K Atoll. This group included Task Groups 51/1 and 51*2 , certain elements of Task Forces 52 and 53 and Tas?s Group 58,,4" The group was organized at EV/AJALEIN after the capture of that atoll had been assured: ' > (g) Task 'Group 51»19j comprising a series of task units transporting Garrison Forces to SN1VJET0K Atoll. , 3. Commander Task Force 51' Operation Plans A6-43 and A9-44 give the major organization of the naval vessels and principal troop units included in Task Fores 51 for the FLINTLOCK and CATC'HFCLE Operations„ Enclosure: (J) gives the details of loadings of trocp-3- and . supplies in transports and cargo vessels included in Task Force 51« Summary tab3.es of the total numbers and types of vessels and nrjabe.ra and distribution of troops attached to the v Joint Expeditionary Force during the period of this report are as follows: I. Summary of Vessels of Joint Expeditionary Force: AGO 2 PD 8 OEB •16 • CY 45 CYL fe fl;'2- |i -j, AE»f: 15 • CVE rgQ,: 12 CA 8 Ti'3 8 CL 4 AT 6 Total 297 APA 28 APD 4 MA 7 AP 6 LSD 5 AK 4 C5A/Al6-3(3) M /,•: A **3% U-* • til ft *•' >• ^ F-t P>'i f>6\ «P> i" «_ Serial 0018(7 ^ H j 1 ' ' 1 - 14' ' J • •• ;v 'v ?' - v Subject: Report of Amphibious Operations for the capture of the MARSHALL.ISLANDS (JL3NEL0CK and CATCEPOLE ' > Operations). 11• Summary of Troops of Joint Expeditionary Force: :Assault : Garrison Troops. ; Troops:(including Initial : : Defense Forces) Tot al : Army :Marine: Army :Marine Navy .Southern Attack Force :21,76a; : 21768 • • • ;Northern Attack Force : :20778 : 20778 • • • \ MAJURO Attack Force : 1459: 136 : 1595 * • • Corps Reserve : 3701: 5624 : J 9325 • « » ENIWETOK Attack Force j 4509: 5760 : 10269 :(4509):(5760): Southern Garrison Force 8553 : 1832 2936 13326 :(4554):(1154) (5708) * • Northern Garrison Force i : 7710 3175 10885 : , :(4124) (4124) • • MAJURO Garrison Force. : 1459 : 1978 3728 7165 :(1459): (1459) • « EtOTffCK Garrison Force : 5990*: 3212 5439 14641 :(3777): (3777) Force Aggregates :31437 :32298::16007 :14732:1527S 109752 Total duplications t(4509):(5760):(9790):(5278) (25337) Net Total Troops employed :26928 :26538 6217 : 9454 15278: 84415 NOTE: (1) figures siio-wn in parenthesis represent duplication - 3 - H rk / f?,ss -i \%j C5A/Al6-3( 3) Serial 0018(3 ft * * I '"V Subject: Report of Amphibious Operations for the capture of the MARSHALL ISL&ID3 (FLI1ITL0CK and CACCEPOLS Operations)• resulting from the.- re-employment of certain troops for successive missions. Examples: (a) Some assault troops reemployed for garrison defense. (b) Corps Reserve reemployed for EITIIJETOIC Attack. These duplications are deducted to show Het Total Troops Employed, (2) Figures do not include garrison troops ivhich ti/ere sent forward in later echelons not assigned to TF 51. 4« The commanders of the major elements of Assault Troops and Garrison Forces of the FLI17£L0CIC and CATCIIP0L1 Operations were as follows: . • • -(a) Commander Expeditionary Troops, FLIiTTLOCK Operation ' {Assault and Garrison Forces), Ivlajor. General Holland LI, SMITH, USI.IC, Commanding General, FIFTH Amphibious Corps j. 1 .(b) Commander Southern Landing Force, Major General C.H. CORLSTT, U.S.A., Commanding General, SEVJHTH Infantry Division; (c) Commander northern Landing Force, Major General H. SCHMIDT, USMC, Commanding General, FOURTH Marine Division; (d) Commander IGJ&TALEIU Garrison Forces (Atoll Commander), Rear Admiral A«D. K3MHARD, U.S. Havy; . (e) Commander Advance Base,'ROI ISL/1TD, Captain E.C. EWEH, U.S. Il-Javy; CRUISE, U.S. lUavy, later relieved by Captain V.F. GRikUT, USN; i- 4 - * $$ C5A/Al6-3(3) Serial 0018:' sa&wi • & *»> Subject: Report of Amphibious Operations for the capture of the MARSHAL l" ISLANDS (FLINTLOCK and CATCIIPOLE Operations). (h) Commander Expeditionary Troops, CATCIIPOLE Operation (Assault and Garrison Forces), Brigadier General I.E. WATSON, USIIC, Commanding General, 22nd Harines; (i) Commander 3IUVJET0E- Garrison Force (Atoll _ Commander) and Commander Advance Base, ilir.JETOK ISLAND, Captain E.A. CRUISE, U.S.N; (j) Commander Advance Base, ENGEBI ISLAND, Colonel C.R. JOKES, U.S. Army. ^ (B) STRATEGIC FEATURES OF FLINTLOCK PLAIT 5. The principal strategic features of the FLINTLOCK Plan were as follows: (a) An intensified bonking by Central Pacific shore-based aircraft of all defended islands of the UAE8IIA1IS, beginning Dog minus FIFTHS! Day;, (b) Destruction of all enemy aircraft in the HARSHALLS by carrier attacks on the airfields on KWAJALEIN, ENIi/ETOE^ WCTJE, and MALOELAP Atolls, beginning Dog minus TWO Day, Thereafter, continued interdiction of enemy airfields -on ENIWETGE by carrier, aircraft, and enemy airfields on V.'OTJS and IIALOELAP by carrier aircraft and by ship bombardment; (c) Destruction by friendly.shore-based aircraft of enemy aircraft, and interdiction of enemy airfields, on MILLS, JALU IT, NAUHJ, WOTJE, IIALOELAP, and WAKE; (d) Softening up of enemy defenses, and destruction of supplies on KWAJALEIN Atoll, by carrier and shore-based - air attacks and* by bombardment by new battleships on. Dog minus ONE Day. Destruction of enemy supplies on IviALOSLAP .and WOTJE by cruiser and destroyer bombardment on Dog minus TWO and Dog minus 0113 Daysj filial p (e) Attacks <sfi ini&M 3iaMl%fM -ii&rcliljaercpisiTB ysnip^mg i > W — J&-r- cancentration of su' ?-afi§gr^f - 5 - C5A/Al6-3(3) Serial 001CO. mrj. 'Subject: Report 'of ^£mphibi.©i*si'TOpefraifipipf f or the capture of the LIAI^Il^US ISLl^DS and GATCIIPCL2 Operations), (f) The operation of four large carrier groups in covering , positions with respect to ISTAfALSIK Atoll, and the direct 5 support of landing operations by two of these groups, begin­ ning Dog Day; (g) The simultaneous capture, by three naval attack forces, of the southern, and northern portions of EnAJALSIH Atoll, and of MAJTJRQ Atoll; (h) The consolidation of the defenses of the captured^ , positions, and the construction or rehabilitation of airfields for offensive and defensive uses. / . 6, Capture of iETIwIiiTOIv as a part: of the ILBELOdC Operation was considered, but owing to uncertainties as to what part of the available troops the capture of would absorb, the oper­ ation against .27ISET0E was not prescribed in the major directives• However, tentative plans were arawn up and directives prepared for issue should success' at £J*JAI»3IK prove rapid enough to justify the extension of the operation* t'o.
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