21 April 1944
ANNEX "D" TO OPERATION PLAN NO. 2-44
NAVAL GUNFIRE SUPPORT PLAN
The source document was missing pages 1-4 of this Annex. If this material is located elsewhere, this page will be updated.- HyperWar Editor.
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APPENDIX 1 - CHARACTERISTICS OF FIRE SUPPORT SHIPS
Ship Main Battery Max. Range Rounds per Gun AP HE NEVADA 10-14"/45 33,000 92 25% 75% TEXAS 10-14"/45 18,000 100 50% 50% ARKANSAS 12-12"/50 18,000 113 33% 66% EREBUS 2-15" 30,000 135 25% 75% TUSCALOOSA 9-8"/55 32,000 147 25% 75% AUGUSTA 9-8"55 32,000 145 25% 75% GLASGOW 12-6" 24,000 200 40% 60% MONTCALM 9-152mm 28,000 170 65% 35% GEORGES LEYGUES 9-152mm 28,000 170 65% 35% HAWKINS 7-7.5" 23,000 150 20% 80% ENTERPRISE 6-6" 19,000 250 20% 80% BELLONA 8-5.25" 23,000 360 20% 80% BLACK PRINCE 8-5.25" 23,000 360 20% 80% SOEMBA 3-5.9" 16,000 150 --- 100% U.S. DDs 4-5"/38 18,000 400 6%* 94% Hunt DDs 4-4" 19,000 250 50% 50%
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APPENDIX 2 - GUNFIRE SUPPORT COMMUNICATIONS
- Shore Fire Control Parties and fire control ships will use the Shore Fire Control Code contained in Allied Expeditionary Force Signal Book. The procedure to be used will be that contained in Chapter IV, Allied Naval Assault Gunnery Instructions. The procedure outlined therein is similar to CSP2156(A), U. S. Shore Fire Control Code. It should be noted that British Forward Observers Bombardment (FOBs) and British Aircraft Spotters will normally use the clock code method of observation.
- Shore Fire Control Parties will employ SCR609 and SCR284 for gunfire support communications in accordance with standard doctrine. All fire support ships except Hunt destroyers, SOEMBA, ELLYSON, HAMBLETON, RODMAN, EMMONS, BARTON, WALKE, LAFFEY, MEREDITH and O'BRIEN will be equipped with SCR608. Assault Force Commanders will instruct fore support ships on he initial crystal settings for SCR608.
- Call signs of fire support ships for gunfire support communications are listed below. These call signs are only to be used for naval gunfire support communications and will not change.
SHIP CALL SIGN SHIP CALL SIGN NEVADA DVN CORRY RCR TEXAS SXT HOBSON BOH ARKANSAS NKR BUTLER LTB EREBUS SBR GHERARDI RHG QUINCY CNQ HERNDON NRH TUSCALOOSA SUT SHUBRICK BHS AUGUSTA TSG NELSON SLN HAWKINS KWH MURPHY PRM GLASGOW SLG GLENNON NLG GEORGES LEYGUES GRG JEFFERS FJF MONTCALM TNM PLUNKETT KLN ENTERPRISE NTR TANATSIDE TNT BELLONA LBL MELBREAK BLM BLACK PRINCE CLB TALYBONT YLT SOEMBA BMS BARTON TRB FRANKFORD ARF WALKE LAW CARMICK MRC LAFFEY FAL DOYLE LYD MEREDITH DRM ENDICOTT CDN O'BRIEN RBO McCOOK CMC JOUETT TUJ BALDWIN DLB SOMERS MOS HARDING RAH DAVIS VAD SATTERLEE TAS ELLYSON LEL THOMPSON MHT HAMBLETON MAH FORREST RFR RODMAN MDR FITCH TIF EMMONS MEM
- Call signs of Shore Fire Control Parties are listed below. These call signs will not change. Naval Gunfire Liaison Officers with infantry battalions will use call sign of their Shore Fire Control Party followed by the numeral 1.
SFCP Attached Call Sign SFCP Attached Call Sign SFCP 1 2nd Ranger Battalion DJX SFCP 7 1st Battalion 16th RCT ZPW SFCP 2 5th Ranger Battalion FGH SFCP 8 2nd Battalion 16th RCT FAT SFCP 3 1st Battalion 116th RCT KRD SFCP 9 3rd Battalion 16th RCT KMA SFCP 4 2nd Battalion 116th RCT MKR SFCP 10 7th F. A. Battalion HQ HOF SFCP 5 3rd Battalion 116th RCT SJT SFCP 11 1st Battalion 18th RCT CWR SFCP 6 111th F. A. Battalion HQ NAD
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SFCP Attached Call Sign SFCP 12 2nd Battalion 18th RCT LSG SFCP 13 3rd Battalion 18th RCT DBR SFCP 14 32nd F. A. Battalion HQ PBR SFCP 15 1st Division Artillery HQ PVA SFCP 16 1st Battalion 115th RCT TBN SFCP 17 2nd Battalion 115th RCT BGK SFCP 18 3rd Battalion 115th RCT PAD SFCP 19 110th F. A. Battalion HQ FRX SFCP 20 1st Battalion 26th RCT JBA SFCP 21 2nd Battalion 26th RCT SDA SFCP 22 3rd Battalion 26th RCT NSB SFCP 23 33rd F. A. Battalion HQ HAS SFCP 24 1st Battalion 175th RCT QFJ SFCP 25 2nd Battalion 175th RCT RGA SFCP 26 3rd Battalion 175th RCT DKF SFCP 27 224th F. A. Battalion HQ SVG SFCP 28 29th Div. Artillery HQ CHW SFCP 29 1st Battalion 8th RCT FOL SFCP 30 2nd Battalion 8th RCT DMK SFCP 31 3rd Battalion 8th RCT GUS SFCP 32 29th F. A. Battalion RCT RBK SFCP 33 1st Battalion 22nd RCT BJV SFCP 34 2nd Battalion 22nd RCT JRM SFCP 35 3rd Battalion 22nd RCT PNK SFCP 36 44th F. A. Battalion HQ JAX SFCP 37 1st Battalion 12th RCT MVL SFCP 38 2nd Battalion 12th RCT SOR SFCP 39 3rd Battalion 12th RCT NGW SFCP 40 42nd F. A. Battalion HQ KUD SFCP 41 4th Division Artillery HQ BFE SFCP 42 358th RCT, 90th Infantry Division AKW SFCP 43 502nd RCT, 101st Airborne Division GAR SFCP 44 359th RCT, 90th Infantry Division DAD PNGS
Attached Call Sign PNGS 1 501st RCT 101st Airborne Division FVS PNGS 2 501st RCT 101st Airborne Division TLO PNGS 3 501st RCT 101st Airborne Division QAD PNGS 4 502nd RCT 101st Airborne Division HWL PNGS 5 502nd RCT 101st Airborne Division NOP PNGS 6 502nd RCT 101st Airborne Division DSA PNGS 7 506th RCT 101st Airborne Division LGP PNGS 8 506th RCT 101st Airborne Division KGB PNGS 9 506th RCT 101st Airborne Division QVS
- The single call sign procedure will not be used for gunfire support communications.
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- The assignment of frequencies to Assault Forces is indicated below. Assault Force Commanders will assign frequencies to Shore Fire Control Parties.
- AM Frequencies
Force "O" (including Rangers and Force "B")
* Permanent Naval Frequencies. Remainder of frequencies will not be available after D+14 day.
- FM frequencies
Force "O" (including Rangers and Force "B")
27.0 mcs (Shared with Army after D+2 day)
27.4 mcs (Shared with Army after D+5 day)
29.4 mcs (Shared with Army after D+7 day)
29.8 mcs (Shared with Army after D+14 day)
30.0 mcs (Shared with Army after D+14 day)
30.4 mcs (Shared with Army after D+14 day)
30.7 mcs (Shared with Army after D+3 day)
31.0 mcs (Shared with Army after D+6 day)
31.4 mcs (Shared with Army after D+7 day)
31.6 mcs (Shared with Army after D+14 day)
32.0 mcs *
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27.2 mcs (Shared with Army after D+5 day)
29.6 mcs (Shared with Army after D+14 day)
30.2 mcs (Shared with Army after D+14 day)
30.5 mcs (Shared with Army after D+2 day)
31.2 mcs (Shared with Army after D+5 day)
31.7 mcs (Shared with Army after D+14 day)
32.2 mcs *
32.6 mcs *
33.0 mcs *
33.4 mcs *
33.8 mcs *
34.2 mcs (Shared with Army after D+2 day)
34.6 mcs (Shared with Army after D+10 day)
* Permanent Naval Frequencies. Remainder of FM frequencies will be shared with Army as indicated above.
- In assigning frequencies to Shore Naval Fire Control Parties, Assault Force Commanders will attempt as far as possible to assign frequencies which are only a few kilocycles or megacycles apart from frequencies of another Assault Force to Shore Fire control Parties which will operate on the most distant flank from that Assault Force.
- Slidex Code will be issued to all Shore Fire Control Parties and fire support ships. The Slidex Code will only be used by Shore Fore Control Parties to relay intelligence or situation reports to firing ships or to authenticate for messages. When Slidex Code is to be used, the word SEX will be sent before the Slidex Code groups. In order to authenticate for messages the ship or party requesting authentication will send the challenge "BANKO" and time of receipt of the message. The other station will then send the time of receipt of the message encoded in the Slidex Code.
- Slidex Code cursor settings (key pairs) are listed below. The initial settings may be used until a change is required. Assault Force Commanders are authorized to change settings, informing Naval Commander Western Task Force. The key rectangle will also remain unchanged until a change is necessary. In using the Slidex Code the originator of the message will indicate to the receiver the position in which he has set his cursors by giving the coordinates of the key rectangle.
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(1) Normal Setting Horizontal key K C G L F I B H E J A D N C G L Vertical key D J N B Q L H A F K P J M E G C I D J N B Key rectangle 3rd F (2) Alternate Setting Horizontal key F D J I C H K L G B E A F D J I Vertical key B N Q A F I O C K P H G L D J E M B N Q A Key rectangle 35 (3) Alternate Setting Horizontal key H D K A J G I C E L F B H D K A Vertical key O D L E K H G B F A M C Q J N P I O D L E Key rectangle 3rd J (4) Alternate Setting Horizontal key J D K B F A G E I L A C J D K B Vertical key G C J N A O E M Q F H P B I D K L G C J N Key rectangle 1st K (5) Alternate Setting Horizontal key D B I C K E L G A H F J D B I C Vertical key M Q A G N B O P L E K H C F D I J M Q A G Key rectangle 2nd H (6) Alternate Setting Horizontal key A D G J E C L H B F I K A G D J Vertical key F H K D O A N Q J M B E I L C G P F H K D Key rectangle 44 (7) Alternate Setting Horizontal key C H E I B K D L A G J F C H E I Vertical key E A H O B F I K J M G D P L C N Q E A H O Key rectangle 1st F (8) Alternate Setting Horizontal key F B G E K J H A L C I D F B G E Vertical key P I F Q H D M G C O E N A K B L J P I F Q Key rectangle 3rd U (9) Alternate Setting Horizontal key C H F L E A G D B K I J C H F L Vertical key K G E I D J C L P H A F B N O M Q K G E I Key rectangle 56 (10) Alternate Setting Horizontal key D C L E F B H A I F K G D C L E Vertical key N E C K I M D A O B L Q F H P G J N E C K Key rectangle 2nd A
- The following vocabulary will be used with Slidex Code. The RA unit card will not be used.
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CHANGE FREQUENCY TO
CLOSING DOWN AT
COMBINED ARMY AND NAVY SHOOT
DELAY (ED) (ING)
HARRAS (ED) (ING)
84 IN COMUNICATION WITH Y
MOVE (D) (S) (ING)
MY LOCATION IS
NO MOVEMENT SEEN
OUT OF ACTION
PASS (ED) (ING)
PROTECT (ION) (ING)
RECEIVE(D) (R) (ING)
REPORT (ED) (S) (ING)
RESERVE (D) (S)
SHELL (ED) (S) (ING)
STOP (PED) (PING)
TRANSMIT (TER) (SION)
WITHDRAW (AL) (ING)
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- Compromise of the Slidex Code and settings must be carefully guarded against. Any loss or compromise of the system should be immediately reported to Assault Force Commanders.
A. G. KIRK,
Rear Admiral, U. S. Navy,
Naval Commander Western Task Force.
R. T. CRAGG,
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APPENDIX 3 - PROVISIONS FOR AMMUNITION REPLENISHMENT
The source document was missing page 1 of Appendix 3. If this material is located elsewhere, this page will be updated.- HyperWar Editor.
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- Ammunition at Portsmouth is preloaded in lighters, at Portland in coasters, and at Plymouth in coaster and lighters. Forty percent (40%) of 5"/38 and 3"/50 ammunition at Plymouth is ashore. NITRO will be at Plymouth after D-day. MOUNT BAKER will be in Clyde initially until required.
- Reserve depth charge material is located as follows:
PLYMOUTH PORTLAND FALMOUTH
SALCOMBE LONDONDERRY D.C. Mk. 6 180 1000 200 150 24 1326 D.C. Mk. 7 60 170 30 452 D.C. Mk. 9 446 D.C. Mk. 9-2 500 100 D.C. Pistols Mk. 6 1208 D.C. Pistols Mk. 6-1 1000 200 D.C. Boosters Mk. 6 1073 D.C. Boosters Mk. 6-2 1000 200 D.C. Extenders Mk. 6 1357 D.C. Booster Extenders Mk. 6-1 1000 200 1086 Percussion Detonators Mk. 1-1 1950 4300 "K" Gun Impulse Chgs. #1 273 "K" Gun Impulse Chgs. #2 340 "K" Gun Impulse Chgs. #3 370 "K" Gun Arbors Mk. 2 457 "K" Gun Arbors Mk. 6 56 "K: Gun Arbors Mk. 7 150 850 "Y" Gun Impulse Chgs. #1 426 "Y" Gun Impulse Chgs. #2 329 "Y" Gun Impulse Chgs. #3 204 "Y" Gun Arbors Mk. 1 376 7V2 Proj. Chg. Bodies Mk. 44 800 7V2 Proj. Tails Mk. 4-1 800 7V2 Proj. Chg. Fuze Mk. 136-3 800 7V2 Rocket Bodies Mk. 5 1820 2V25 Rocket Motors Mk. 3 1820 Fuzes Mk. 131-3 1820
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- British replenishment ammunition for fire support ships is located as follows:
Caliber Milford Haven Plymouth Portsmouth Support Depots1 16" ¼ refill ¼ refill ½ refill 15" 200 APC (6 CRH)
200 HE (6 CRH)
200 HE (4 CRH)
400 APC (6 CRH)
600 HE (6 CRH)
200 HE (4 CRH)
200 HE (6 CRH)
400 APC (6 CRH)
200 CPC (4 CRH)
7.5" 1 refill 1 refill 1 refill 1 refill 6" Mk XXIII 3 refills 3 refills 4 refills 5.25" 2 refills 3 refills 3 refills 4 refills 6" Mk XII 1 refill 2 refills 2 refills 3 refills Destroyers 10% 30% 40% 20% Portland
1Support depots are remote ammunition depots which will replenish the main ammunition ports.
- For other British warships one to two refills will be provided in reserve and will be located as follows:
(1) Escort destroyers, corvettes and frigates: 35% Portsmouth
20% Milford Haven
(2) A/S Trawlers: 30% Milford Haven
(3) Minesweepers: 50% Portsmouth
- Naval Commander Western Task Force will sail fire support ships to ports for replenishment, informing the Commander in Chief of the Home Command concerned by signal, in order that diversions to other ports can be made if necessary. After D-day ships, when signalling their expected time of arrival at replenishment ports should include in the signal the approximate amount of ammunition required. The following procedure shall be followed in sailing British fire support ships to ports for replenishment:
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- Monitors will initially replenish at Portsmouth.
- The first four 6" Mark XXIII cruisers will replenish at Portsmouth; the next two at Plymouth.
- The first two 6" Mark XII cruisers will replenish at Portsmouth.
- The first three 5.25" cruisers will replenish at Portsmouth.
- The first 7.5"5" cruiser will replenish at Portsmouth.
- The first 14 Fleet destroyers and 6 Hunt destroyers will replenish at Portsmouth; the next three Fleet destroyers at Plymouth.
- SOEMBA will replenish at Plymouth.
- MONTCALM and GEORGES LEYGUES will replenish at Milford Haven.
- Ammunition Stores Issuing Ships (A.S.I.S.) will carry the following types of ammunition to the far shore for gun support craft, ferry service craft, accommodation ships and headquarters ships which will remain on the far shore:
(1) 5"/38 cal. for U.S. headquarters ships. (2) 4.7" for LCG(L). (3) 4" H.A. for British coastal forces. (4) 3" H.A. for British coastal forces. (5) 12-Pounder. (6) 6-Pounder. (7) 2-Pounder for LCF. (8) 20 and 40 mm. (9) .30 and .50 caliber. (10) No. 24 Smoke Generator. (11) Mark VI Depth Charges.
- It is intended to base these ships, prior to the operation, two in Thames Area and six at Milford Haven. Two A.S.I.S. will be sailed from Milford Haven on D-2 day to arrive off SPITHEAD on D-day and in the assault area on D+1 day. Three A.S.I.S. will be sailed from Milford Haven on D-day two of which remain off SPITHEAD until further orders. The third is to proceed to the assault area, arriving on D+3. One A.S.I.S. will be sailed from Thames to arrive in the assault area on D+3 day. When they arrive in the assault area A.S.I.S. are to come under the control of Task Force Commanders who will issue the necessary instructions regarding issue of ammunition. No further A.S.I.S. ships will be sailed to the assault area unless Task Force Commanders, FOBAA, or FOWEST signal that they are required.
- Twenty and forty millimeter ammunition will be available at all British and U.S. landing craft yards and will also be preloaded with larger caliber ammunition in coasters and lighters. On the Far Shore LSTs may issue 20 and 40 mm ammunition in emergency to escort vessels and ferry service craft.
- Smoke Floats MK. and Floating Smoke Pots M4A1 will be available for issue to landing craft at all U.S. Advanced Amphibious Bases. Reserve F.S. Smoke Tanks for destroyers and filling equipment for F.S. Smoke Tanks will be in Plymouth. CERES and CAPETOWN will each carry 500 mark III Smoke Pots, 500 Floating Smoke Pots M4A1, and 1000 No. 24 Smoke Generators.
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APPENDIX 4 - PROVISIONS FOR AIR SPOTTING
- The following single seater fighter aircraft are available for air spotting on naval gunfire for the Eastern and Western Task Forces:
16 Mustangs - No. 414 Squadron R.C.A.F. 16 Mustangs - No. 2 Squadron R.A.F. 16 Mustangs - No. 26 Squadron R.A.F. 16 Spitfires - No. 268 Squadron R.A.F. 40 Spitfires/Seafires - No. 3 Naval Fighter Wing F.A.A.
- The three Mustang Squadrons will be detached at 1200 on D-day when they will return to carry out their normal tactical reconnaissance duties. The remainder of the aircraft will be continuously available for air spotting.
- Spotting aircraft will not be assigned to individual fire support ships but will be pooled and will operate from Lee-on-Solent.
- Spotting aircraft will operate in pairs, one spotter and one escort, known as a weaver. Both aircraft will operate on the same VHF voice frequency.
- Initially the total number of available aircraft will be divided into groups, each group being on a different frequency and assigned to Assault Forces. Availability of aircraft limits the total number of groups assigned Western task Force to ten from H-40 minutes until H+230 minutes. After H+230 minutes five groups of aircraft will be available to Western Task Force.
- Spotting aircraft will arrive over the assault area at H-40 minutes and will be relieved on station. Each aircraft will be capable of remaining on station for 45 minutes. The program of spotting aircraft sorties will be divided into 45 minute periods; period 1 will commence at H-40 minutes.
- The following table indicates allocations of groups of aircraft to Assault Forces for the first twenty-four periods. Periods when no aircraft of a certain group are available are due to the requirement of a 90 minute turn-around for those groups which do not contain sufficient aircraft to be relieved on station.
GROUP PERIOD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 6 U U U U U U U U U U U U U U U U U U U U U U U U 7 U U U U U U U U U U U U U U U U U U U U U U U U 8 U U U U U U U U U U U U U U U U U U U U U U U U 9 O O O O O O O O O O O O O O O O O O O O O O O O 10 O O O O O O O O O O O O O O O O O O O O O O O 12 O O O O O O 14 O O O O 16 U U U U 18 U U U U 20 U U U U
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- Assault Force Commanders will submit to Allied Naval Commander-in-Chief Expeditionary Forces and Naval Commander Western Task Force the following information:
(1) Targets to be spotted during each period assigned and fire support ship assigned. Since it is considered that two targets may be spotted during a single spotting period, two targets should be assigned for each period. Pre-arranged targets may be assigned as long after H-hour as is considered practical, thereafter targets may be targets of opportunity.
- Sorties will be flown by Tactical Air Force who will in the event of casualties, adjust the number of aircraft per group so that the remaining numbers of sorties per group will be equal.
- Each spotting aircraft will be briefed by Tactical Air Force for two targets per sortie as designated by Assault Force Commanders. In absence of further instructions relief aircraft will be briefed on the same target.
- Should Assault Force Commanders require succeeding sorties to be briefed on different targets, they are to signal Allied Naval Commander-in-Chief Expeditionary Force informing Tactical Air Force and Naval Commander Western Task Force the new target and the aircraft affected. Allied Naval Commander-in-Chief Expeditionary Force will then make the necessary arrangements with tactical Air Force.
- If a reallocation of spotting aircraft between Task Forces is necessary, Allied Naval Commander-in-Chief Expeditionary Force will make necessary arrangements with Tactical Air Force. Naval Commander Western Task Force will reallocate aircraft between Assault Forces "O" and "U" as may become necessary.
- Spotting procedure will be in accordance with Allied Expeditionary Force Assault Signal Book. Examples of spotting procedure are given in Allied Naval Assault Gunnery Instructions.
- British air spotters will normally use the clock code method of observation. The first ranging salvo will be a 400 yard down ladder.
- Before opening fire ships are to check with spotting aircraft the grid coordinates of the target.
- Spotting aircraft may discover targets of opportunity and request fore on them. In this case the ship is responsible for insuring that own troops are not endangered by the fire.
- Fire support ships must inform spotting aircraft of the approach of enemy aircraft.
- All grid coordinates passed to spotting aircraft will be given in the British Military Grid System (Lambert and Nord de Guerre grid).
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- On D-day and after Assault Force Commanders are to signal to Allied Naval Commander-in-Chief Expeditionary Force a forecast of their requirements for spotting aircraft for the following day as early as practicable on the previous evening, informing Naval Commander Western Task Force. Allied Naval Commander-in-Chief Expeditionary Force will inform Assault Force Commanders to the extent the requirements can be met.
- Frequencies are listed in Communication Plan, Annex "L", Appendix 3.
- Call signs for spotting aircraft will be promulgated by Allied Expeditionary Force. The call sign of the firing ship will be that of the spotting aircraft followed by the word "TURRET". If one aircraft is spotting for two ships, the all sign of the second ship will be that of the spotting aircraft followed by "TURRET TWO". Each group of spotting aircraft will have one call sign and one frequency. Fire support ships will carry sufficient crystals to enable them to communicate with any group.
A. G. KIRK,
Rear Admiral, U. S. Navy,
Naval Commander Western Task Force.
R. T. CRAGG,
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