August 23.

A large portion of the central line was so flooded that no advance was possible. It was planned, therefore, that the assault should be on both wings, the area around Authuille being nipped out and cleared at a later stage. The operation began on the evening of August 23 by a movement along the northern bank of the river to the south-east of Miraumont, so as to partly encircle that village and help forward the Fourth Corps on the left, who were still held up in front of it. The main Ancre attack was carried out by the 113th Brigade on the right, who came away with a fine impetus on the eastern slopes of Usna Hill, capturing La Boiselle and reaching a point 1100 yards west of Ovillers. The 114th Brigade on the left had with great difficulty and corresponding valour crossed the Ancre under machine-gun fire and had established themselves on the slopes, fighting their way forward all day until they reached a point north-west of Pozières. All around Thiepval there was close fighting in which this brigade acted in close liaison with the 50th Brigade. In this struggle many gallant deeds were done, and it is recorded, among others, how Lieutenant Griffiths of the Welsh Regiment advanced using his Lewis gun as if it were a rifle. He is said to have slain sixteen Germans in this novel fashion before his own wounds brought him fainting to the ground. According to the plan the two converging brigades left a large central section untouched, which was promptly mopped up by the 115th Brigade, so that every man of the Thirty-eighth Division was engaged in this fine operation.

August 24.

Farther to the left the 6th Dorsets of the 50th Brigade, in spite of gas clouds and machine-guns had crossed the Ancre in its narrowest reach, where some sort of bridges had been prepared. With great energy and initiative they cleared up the front trenches and pockets so as to give room for a deployment, pushing their patrols out towards Thiepval, but they were driven in again by an attack from the Schwaben Redoubt. The rest of the 50th Brigade (Gwyn-Thomas) had followed, most of the infantry wading across in the dark up to their waists in mud and water. Pushing on, as part of the general advance, all three battalions of the 50th Brigade went forward, capturing several hundred prisoners, but deviating so far from their course that when they thought and reported that they had captured Courcelette it was really Pozières which they had got. In the early afternoon Allason's 52nd Brigade was pushed in on the right of the 50th Brigade, connecting them up with the Welshmen. The mistake in the direction of the 50th Brigade was not an unmixed evil, for while it left the Twenty-first Division with its right flank exposed and in considerable difficulty, it made a pocket of a large number of Germans in front of the Welshmen, 900 of whom were captured. General Robertson saved the situation on the left by pushing in his reserve brigade, the 51st (Dudgeon), and so filling the gap between his division and that of General Campbell.

The latter division, especially the 64th Brigade, which had pushed on to Miraumont the night before, had some desperate fighting. The whole brigade was passed in single file over two foot-bridges. At 11.30 P.M. they were assembled upon the south bank and ready to start. A barrage had been arranged for their attack, but owing to changes in plan it was not thick or effective. The advance was made by the 15th Durhams on the right and the 9th Yorkshire Light Infantry on the left with the 1st East Yorks in support, the column being guided by means of compass bearing, and by the presence of the Ancre on the left flank. This nocturnal march in the face of the enemy was a very remarkable and daring one, for the ground was pitted with craters and there were two ravines with sheer sides at right angles to the advance. Touch was kept by shouting, which seems to have confused rather than informed the enemy, who only fought in patches. Grandcourt was overrun with 100 prisoners, 20 machine-guns, and 4 field-pieces. Early in the morning General M'Culloch, who had conducted the operation, was badly wounded and the command passed to Colonel Holroyd Smith of the Durhams. When full daylight came the brigade was deeply embedded in the German line, and the enemy closed in upon it but their attacks were repulsed. The soldiers were compelled to lie flat, however, in order to escape from the heavy fire. The 110th Brigade of the same division had advanced on the right, but it was acting in close liaison with the Seventeenth Division, and independent of the isolated unit, which was now completely alone on the hill south of Miraumont, their East Yorkshire supports being at Grandcourt, and so much out of touch with the advanced line that the Officer Commanding imagined the stragglers to be all that was left of the brigade. The first intimation of the true state of affairs was given by the wounded Brigadier as he passed on his way to the casualty station. About 10.30 Captain Spicer, the Brigade Major, got back by crawling, and reported that the advanced line still held, though weak in numbers. Aeroplane reconnaissance confirmed the report. All day the valiant band held out until in the evening the advance of the Forty-second Division on their left, and of their own comrades of the 110th Brigade on their right, rescued them from a desperate situation. Their work had been exceedingly useful, as their presence had partially paralysed the whole German system of defence. Great credit in this remarkable affair was due not only to General Campbell and his staff, upon whom the initial responsibility lay, but to the gallant and inspiring leading of General M'Culloch and of the battalion leaders, Holroyd Smith and Greenwood. It was indeed a wonderful feat to advance three miles over such country upon a pitch-dark night and to reach and hold an objective which was outflanked on both sides by the successful German defence. The troops had been heartened up by messages with promises of speedy succour which were dropped by aeroplanes during the day.

The 62nd Brigade had now pushed in between the 64th on the right and the Forty-second Division on the left, touching the latter in the neighbourhood of Pys, so that by the late afternoon of August 24 the whole line was solid and the crossing of the Ancre with the capture of the ridge were accomplished facts. There have been few more deft pieces of work in the war. The German fixed line had been driven back and the remaining operations consisted from this date onwards in a pursuit rather than an attack. It was a pursuit, however, where the retreat was always covered by an obstinate rearguard, so that there was many a stiff fight in front of the Fifth Corps in the days to come.

Divisions had been instructed that the pursuit was to be continued in a relentless fashion, and Corps cavalry, drawn from the 8th and 20th Hussars, were told off to throw out patrols and keep in close touch with the German rearguard. The immediate objectives of the infantry were Longueval and Flers for the Welshmen, Gueudecourt for the Seventeenth, and Beaulencourt for the Twenty-first Division. The general movement was extraordinarily like the advance in the spring of 1917, but the British were now more aggressive and the Germans were less measured and sedate in their dispositions. On August 25 the pressure was sustained along the whole line, and the Germans, fighting hard with their machine-guns which swept the exposed ridges, were none the less being pushed eastwards the whole day. The Welsh took Contalmaison and reached the edge of Mametz Wood, where so many of their comrades had fallen just two years before. The Seventeenth, fighting hard, captured Courcelette and Martinpuich. The Twenty-first got Le Sars and the Butte de Warlencourt, that strange old tumulus which now marked the joining point with the Fourth Corps still advancing on the left. At no point was there a battle and at no point was there peace, but a constant ripple of fire rose and fell along the thin fluctuating line. It is noted in the diaries of some of the British Generals as being the first day of purely open warfare in offensive fighting which their troops had ever experienced.

August 26.

On the morning of August 26 the Welsh overran Bazentin-le-Grand, but the 115th Brigade were held up for a time at the old stumbling-block High Wood. Later in the day it was taken, however, while the 113th Brigade got as far as the edge of Longueval, meeting a severe counter-attack which was rolled back in ruin by rifles and machine-guns. The Seventeenth Division gained some ground, but both brigades, the 51st and 52nd, were held up by a withering fire before reaching Flers. The 64th Brigade on their left met with equal opposition and could not get forward. Everywhere there were signs of a strong German rally for the evident purpose of covering the removal of their guns and stores. It was well maintained and well organised, so that the object was attained. It became clearer with every day that an artillery barrage was still a necessity for an infantry advance.

August 27.