Sir Douglas Haig sums up the situation at this point as follows:
“… The French had made great progress on our right, bringing their line forward to Louage Wood (just south of Combles), Le Foret, Cléry-sur-Somme, all three inclusive. The weak salient in the Allied line had therefore disappeared, and we had gained the front required for further operations.
Still more importance, however, lay in the proof afforded in the results described of the ability of our new armies not only to rush the enemy’s strong defences—as had been accomplished on the 1st and 14th July—but also to wear down and break the power of resistance by a steady relentless pressure, as had been done during the weeks of this fierce and protracted struggle. As has already been recounted, the preparations made for our assault on the 1st July had been long and elaborate; but though the enemy knew that an attack was coming, it would seem that he considered the troops already on the spot, secure in their apparent impregnable defences, would suffice to deal with it. The success of that assault, combined with the vigour and determination with which our troops pressed their advantage, and followed by the successful attack on the night of 14th July, all served to awaken him to a fuller realisation of his danger. The great depth of his system of fortifications, to which reference has been made, gave him time to reorganise his defeated troops, and to hurry up numerous fresh divisions and more guns. Yet in spite of this he was still pushed back, steadily and continuously. Trench after trench, and strong point after strong point, were wrested from him. The great majority of his repeated counter-attacks failed completely, with heavy loss; while the few that achieved temporary success purchased it dearly, and were soon thrown back from the ground they had for the moment regained.
The enemy had, it is true, delayed our advance considerably, but the effort had cost him dear; and the comparative collapse of his resistance during the last days of the struggle justified the belief that in the long-run decisive victory would lie with our troops, who had displayed such fine fighting qualities and such indomitable endurance and resolution.
Practically the whole of the forward crest of the main ridge, on a front of some 9,000 yards from Delville Wood to the road above Mouquet Farm, was now in our hands, and with it the advantage of observation over the slopes beyond. East of Delville Wood, for a further 3,000 yards to Leuze Wood, we were firmly established on the main ridge; while farther east, across the Combles valley, the French were advancing victoriously on our right. But though the centre of our line was well placed, on our flanks there was still difficult ground to be won.
From Ginchy the crest of the high ground runs northwards for 2,000 yards, and then eastward, in a long spur, for nearly 4,000 yards. Near the eastern extremity of the spur stands the village of Morval, commanding a wide field of view and fire in every direction. At Leuze Wood my right was still 2,000 yards from its objective at this village, and between lay a broad and deep branch of the main Combles valley, completely commanded by the Morval spur, and flanked, not only from its head north-east of Ginchy, but also from the high ground east of the Combles valley, which looks directly into it.
Up this high ground beyond the Combles valley the French were working their way towards the objective at Sailly-Saillisel, situated due east of Morval, and standing at the same level. Between these two villages the ground falls away to the head of the Combles valley, which runs thence in a south-westerly direction. In the bottom of this valley lies the small town of Combles, then well fortified and strongly held, though dominated by my right at Leuze Wood, and by the French left on the opposite heights. It had been agreed by the French and myself that an assault on Combles would not be necessary, as the place could be rendered untenable by pressing forward along the ridges above it on either side.
The capture of Morval from the south side presented a very difficult problem, while the capture of Sailly-Saillisel, at that time some 3,000 yards to the north of the French left, was in some respects even more difficult. The line of the French advance was narrowed almost to a defile by the extensive and strongly fortified wood of St. Pierre Vaast on the one side, and on the other by the Combles valley, which, with the branches running out of it and the slopes on either side, is completely commanded, as has been pointed out, by the heights bounding the valley on the east and west....
The general plan of the combined Allied attack which was opened on the 15th September was to pivot on the high ground south of the Ancre and north of the Albert-Bapaume road, while the Fourth Army devoted its whole effort to the rearmost of the enemy’s original systems of defence between Morval and Le Sars.
Should our success in this direction warrant it, I made arrangements to enable me to extend the left of the attack to embrace the villages of Martinpuich and Courcelette. As soon as our advance on this front had reached the Morval line, the time would have arrived to bring forward my left across the Thiepval Ridge. Meanwhile our Allies arranged to continue the line of advance in close co-operation with me from the Somme to the slopes above Combles; but directed their main effort northwards against the villages of Rancourt and Frigicourt, so as to complete the isolation of Combles and open the way for their attack on Sailly-Saillisel.”
That much was hoped from the big attack, to take place on the 15th, there can be no doubt. Brigades resting in the rear of the divisional area could see quantities of cavalry still farther back. It suggested big results.
The limits of the Fourth Army attack were Combles Ravine and Martinpuich, and it was to capture Morval, Les Bœufs, Gueudecourt, and Flers. The Cavalry Corps was to have its head on Carnoy at 10 a.m., and as soon as the four villages had been captured it would advance and seize the high ground round Rocquigny, Villers-au-Flos, Riencourt-les-Bapaume, and Bapaume.
And it was the first battle in which Tanks were employed! [The battle of Flers-Courcelette.]
Even in the midst of the struggle round about the Quadrilateral a steady bombardment had been going on, in preparation of a further attack, since the 12th September. Day firing commenced at 6 a.m. and went on until 6.30 p.m., when night firing started. During the night bombardment lethal shells were used.
On Z day the preliminary bombardment was to be the same as on former days, with no increase until zero hour. When the intense fire, or barrage, commenced, there were gaps left in it for the advance of Tanks.
For the XIV Corps there were, taking part in this attack, fifteen Tanks. Nine were allotted to the Guards Division, three to the 6th Division, and three to the 56th Division.
The instructions given to Tanks were that they should start their attack at a time which would enable them to reach the first objective five minutes before the infantry. When they had cleared up the first objective, a proportion of them was to push forward a short way, to prearranged positions, and act as strong points. Departure from this programme to assist any infantry held up by the enemy was left to the discretion of the Tank Commander.
On the second objective Tanks and infantry would advance together and pace was to be regulated to “tank pace,” which was given as from 30 to 50 yards a minute. For the third and fourth objectives there would be no creeping barrage, and Tanks would start in time to reach the objectives before the infantry. In all cases their action was to be arranged so as to crush wire and keep down hostile rifle and machine-gun fire.
Signals between Tank and infantry were arranged for by means of coloured flags—a red flag meaning “out of action,” and a green flag “am on objective.”
The main task of the 56th Division was to clear Bouleaux Wood and form a strong protective flank, covering all the lines of advance from Combles and the valleys running from the north-east of Combles. The 167th Brigade were ordered to advance as far as the bit of Beef Trench running through Bouleaux Wood, and to Middle Copse on the left of the wood; a flank was also to be formed to the south-east and clear of the wood. The 168th Brigade were to pass through the 167th and carry on the advance by further bounds. The 169th Brigade were to hold the line through Leuze Wood and the left of square 27, and to capture the well-known trench (Loop Trench) to the south-east of the wood which runs into the sunken road to Combles.
One Tank was to advance on the right of Leuze Wood and assist the 169th Brigade to drive the enemy beyond the sunken road; it would then establish itself in the