18 DA Appendix B to OO 1 19 June 1916

APPENDIX “B”

 

BOMBARDMENT TO SUPPORT ASSAULT.

 

(1) PHASES.

 

The bombardment to support the assault will be divided into distinctive phases, as under.

 

Phase I.          From 65 minutes previous to zero time up to zero time.  Intense final bombardment preparatory to assault.

 

Phase II.          From 0.00 to 0.04 minutes.  Bombardment of line “B” for 4 minutes.

 

Phase III.        From 0.04 to 0.09 minutes.  Bombardment of line “C” for 5 minutes.

 

Phase IV.        From 0.09 to 0.19 minutes.  Bombardment of line “D” for 10 minutes.

 

Phase V.          From 0.19 to 0.58 minutes.  Bombardment of line “E” by Left Group and one battery of Centre Group.

LOOP TRENCH, BLIND ALLEY by Centre Group.

Concentration on MONTAUBAN, THE TWINS, THE MILL and communication trenches by Right Group.

 

Phase VI.        From 0.58 to 2.00 minutes.  Two minute test barrage on line “H”.  Concentration of Right Group batteries and forward batteries on MONTAUBAN.

Shelling of BEETLE ALLEY, MONTAUBAN ALLEY, THE TWINS, BLIND ALLEY, THE LOOP etc.

 

Phase VII.       2.00 to 2.30 minutes.  Shrapnel barrage starting from ”F” line and moving in front of infantry by increments of range, until final barrage is established on line ”H”.

 

Phase VIII.     2.30 onwards protection of infantry during consolidation of position gained.

 

  • TIME TABLE.

 

Time Table of bombardment with actual tasks allotted to each battery in the various phases is attached.

 

  • CHART.

 

The attached chart indicates trenches to be engaged by each of the 5 wire cutting batteries per group during the advance.

The lines have been lettered in accordance with preliminary instructions already issued.

 

 

  • 5” Howitzer BATTERIES.

 

When not engaged in Counter Battery work with gas shell these batteries will engage trenches somewhat in rear of front barrage in accordance with time table, and on special points to be selected by Group Commanders.

 

  • FORWARD BATTERIES.

 

These will be employed for dealing with any unforeseen contingencies, and will be allotted certain tasks for which they are well suited owing to their close range.

 

  • SHRAPNEL & H.E.

 

During the bombardment 18-pr batteries will fire shrapnel with a mixture of 20% H.E.

As an indication to the infantry that a lift is about to occur, all 18-pr batteries will fire exclusively H.E. ammunition for 30 seconds at an increased pace previous to each lift, namely about 5 rounds per gun.

All concentrations on MONTAUBAN should consist mostly of H.E. ammunition, a proportion of this class of ammunition should be consequently reserved for these tasks.

 

  • FLANK BARRAGES

 

Throughout the advance Group Commanders will hold themselves in readiness for the possibility of having to establish a flank barrage to protect a salient that may be formed found owing to some portion of the advance being temporarily checked.

 

 

 

PHASE I.

 

65 minutes previous to zero time up to zero time.

 

 

BATTERY           OBJECTIVE                          REMARKS

 

 

15 wire cutting     Line “A”                                 Intense fire.

batteries

 

D/82, D/83,D/84   Communication trenches      Under instructions to be

& trench junctions on            issued by Group Commanders

respective fronts, up to          Counter battery work under

5 minutes before zero.            XIII Corps H.A. for 5

Minutes previous to zero time

 

Forward

Batteries:-            Remain silent.

A/51                       Wire in front of

B/51                      POMMIERS REDOUBT.     During last 15 minutes.

 

 

A.15.d.7.9.   Enfilade BAY TRENCH.       During last 15 minutes

C/51 F.17.b.2.2.   Enfilade BLACK ALLEY.    During last 15 minutes

F.12.c.7.3.    Enfilade MONTAUBAN.       During last 15 minutes

D/51                     BUND TRENCH from BAY  During last 15 minutes

LANE to TRIANGLE

 

2” T.M.                 Front & Support trench

 

Heavy T.M.s         Trench junction in rear

of CRATERS.

 

 

PHASE II 0.00 to 0.04

 

 

BATTERY           OBJECTIVE                          REMARKS

 

 

15 wire cutting         Line “B”                                 Intense fire.

Batteries

 

D/82, D/83, D.84.    Counter battery work             Under orders of XIII Corps                         H.A. with gas shell.

 

Forward

Batteries:-

A/51                       Enfilade MINE ALLEY & BRESLAU ALLEY

B/51                       Same as Phase I.

 

 

A.15.d.       Enfilade BUND TRENCH.

C/51 F.17.b.        Enfilade BLACK ALLEY.

F.12.c.        Same as Phase I.

D/51                     POMMIERS TRENCH           100 yards either side of   junction with POMMIERS LANE.

 

 

PHASE III 0.04 to 0.09.

 

 

BATTERY           OBJECTIVE                          REMARKS

 

 

15 wire cutting         Line “C”

Batteries

 

D/82, D/83, D.84.   Same as Phase II.

 

Forward

Batteries:-

A/51                       Same as Phase II.

B/51                       Same as Phase II.

 

 

A.15.d.         Enfilade BUND SUPPORT.

C/51 F.17.b.         Enfilade BLACK ALLEY.      Only North of Line “C”

F.12.c.          Same as Phase I.

D/51                     Same as Phase II.

 

 

PHASE IV 0.09 to 0.19.

 

 

BATTERY           OBJECTIVE                          REMARKS

 

 

15 wire cutting         Line “D”

Batteries

 

D/82, D/83, D.84.   BEETLE ALLEY &              On their respective Group MONTAUBAN ALLEY.       fronts, as soon as Counter

Battery Work is finished.

 

 

 

Forward

Batteries:-

A/51                       Same as Phase II.

B/51                       Enfilade LOOP Trench.

 

 

A.15.d.         Enfilade POMMIERS LANE

C/51 F.17.b.         Enfilade BLACK ALLEY .       Only North of Line “D”

F.12.c.         Remain silent.

D/51                     POMMIERS Redoubt.

 

 

PHASE V 0.19 to 0.58.

 

 

BATTERY           OBJECTIVE                          REMARKS

 

Left Group Wire

Cutting Batteries       Line “E”             Normal rate of fire intense fire at last and B/83                                                10 minutes.

 

Centre Group       LOOP TRENCH,.    Normal rate of fire intense fire at last

Wire Cutting         BLIND ALLEY,      10 minutes.

Batteries               ETC

 

Right Group Wire   Concentration on Western.       Normal rate of fire, bursts Cutting Batteries     extremity of MONTAUBAN    of intense fire, mostly H.E.

 

D/82                     POMMIERS REDOUBT  Steady rate of fire.

D/83                     THE TWINS.                  Steady rate of fire.

D/84                     MONTAUBAN MILL.     Steady rate of fire.

 

Forward

Batteries:-

A/51                       Same as Phase II.           Only North of Line “D”

B/51                       Western extremity of

MONTAUBAN.

 

A.15.d.         Bursts of fire at S.20.c.2.8.    On tracks at junction of

C/51 F.17.b.         Bursts of fire at S.20.c.2.8. .  valleys

 

F.12.c.          Same as Phase I.

D/51                     POMMIERS REDOUBT.

 

 

 

PHASE VI 0.58 to 2.00

 

 

BATTERY           OBJECTIVE                          REMARKS

 

 

15 Wire Cutting 2 minutes test barrage”     From 1.00 to 1.02. Intense fire.  .

Batteries.           on Line “H                      Barrage will be observed by aeroplane and corrections dropped by message at Divnl. Arty. H.Q. and passed to Groups.

 

Left Group wire   BEETLE TRENCH       Steady rate of fire.

Cutting batteries

 

Centre Group         MONTAUBAN ALLEY,

wire cutting           BLIND ALLEY &         Steady rate of fire.

Batteries.               LOOP TRENCH

 

Right Group           Concentration on

Wire cutting           Western portion of         Bursts of fire.

Batteries.               MONTAUBAN.

 

D/82                      MONTAUBAN.            Bursts of fire

D/83                       MONTAUBAN.            Bursts of fire

D/84                       THE TWINS.                 Bursts of fire

 

Forward Batteries:-

A/51                       Same as Phase II.           Steady rate of fire.

B/51                       Western extremity of      Bursts of fire.

MONTAUBAN.

A.15.d.         Same as Phase V.

C/51 F.17.b.         MONTAUBAN.             Steady rate of fire.

F.12.c.          MONTAUBAN.              Steady rate of fire.

D/51                   MONTAUBAN.              Steady rate of fire.

 

 

 

 

PHASE VII 200 to 2.30.

 

 

BATTERY           OBJECTIVE                          REMARKS

 

 

15 wire cutting   Barrage to be on line                The distance from line “F” to batteries.             “F” for 5 minutes previous       line “H” is approximately

                          to 2.00.  At 2.00 the                  1000 yards for all batteries. 

                           barrage will lift by                    Batteries will consequently   

                           increments of range                  open the barrage at a range

                           of 50 yards until line                of 1000 yards short of the

                          “H” is reached at 2.30               the range required for

                                                                             barrage “H” & will increase

                                                                            their range at the rate of

                                                                             50 yards every 1 ½ minutes

        

D/82,

D/83,

D/84. CATERPILLAR WOOD   On their respective Group fronts       

 

Forward batteries:-              

A/51                 CATERPILLAR WOOD   On Centre Group front, sweeping.

B/51                 CATERPILLAR WOOD   Moderate rate of fire.           

C/51                 CATERPILLAR WOOD   On Right Group front, Moderate rate of

fire.

D/51                CATERPILLAR WOOD   On Left group front, all four guns.  moderate rate of fire.

 

 

PHASE VIII 2.30 onwards.

 

 

BATTERY           OBJECTIVE                         REMARKS

 

 

Wire cutting         Barrage “H”                 Steady rate of fire, periodic bursts

Batteries.                                                               and ready to turn on intense bombardment if required.

 

Remainder.         Same as Phase VII.

 

 

AMENDMENTS TO 18TH DIVNL. ARTY. OPERATION ORDER NO 1

 

Appendix ”B”, Phase VII & VIII should be amended as under.

 

 

PHASE VII 2.00 to 2.30.

 

 

BATTERY           OBJECTIVE                          REMARKS

 

 

15 Wire Cutting Barrage to be on             The distance from line “F” to line

Batteries.             line “F” for 5                  “H” is approximately 1000 yards for

minutes previous             all batteries.  Batteries will cones-

to 2.00.                           quently open the barrage at a range

At 2.00 the barrage         1000 yards short of range required

will lift by increments     for barrage “H” and will increase

of range of 50 yards        their range by increments of 80 yds.

until line “H” is reached  The four right batteries of Right

at 2.30.                              Group (C/85, A/50, C/84, A/84) will increase their range at a slower rate, 50 yds every 2 ½ minutes until line “H” is reached.

 

D/82,D/83,               Western houses of                 Bursts of fire up to 2.15, intense

D/84.                         MONTAUBAN.                    from 2.15 onwards.  Lift off MONTAUBAN at2.25.

 

A/51                         MARLBRO WOOD

 

B/51                         Western corner of           Orchards & houses just east of Right

MONTAUBAN.            Group boundary.

 

C/51                         CATTERPILLAR WOOD     MARICOURT Section to enfilade western portion of wood

D/51                         CATERPILLAR WOOD.      On Centre Group front.

 

PHASE VIII 2.30. onwards

 

 

BATTERY           OBJECTIVE                          REMARKS

 

 

Wire Cutting     Barrage “H”                         Steady rate of fire, periodic bursts of fire,

Batteries                                                          and ready to turn on intense fire if necessary.

 

 

D/82, D/83,   CATERPILLAR WOOD on   During this phase forward observation

D/84.               respective Group fronts.         must be obtained as soon as possible, and barrage regulated by actual observation and reports from Liaison Officers.

 

A/51                               -do-

B/51                               -do-

C/51                              -do-

D/51             MARLBRO WOOD

 

 

 

A.F. Brooke

Captain R.A.,

Brigade Major R.A. 18th Division

 

H.Q. R.A. 18/Div

27 June 1916

 

Copies to all concerned.

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