The advance on September 4 was resumed in the face of some sporadic opposition, but by the evening of the 6th the enemy was all across the Canal, and the Sixth Corps was awaiting developments elsewhere. On September 11 steps were taken, however, to get into striking position for the final fracture of the Hindenburg Line, in view of which it was necessary to gain the Hindenburg front system west of the Canal. On September 12 the main attack was delivered, though on September 11 the Second Division had secured the western ends of the Canal crossings. The centre of the new operation was the attack upon Havrincourt by Braithwaite's Sixty-second Division. This operation was carried out by the 186th and 187th Brigades, the pioneer battalion, 9th Durham Light Infantry, being attached to the former, while eight brigades of field-guns and three groups of heavies lent their formidable assistance. The right of the Sixty-second was in close touch with the Thirty-seventh Division, which was attacking Trescault. The advance of both brigades was uninterrupted, though strongly opposed. The 2/4th Hants and 5th West Ridings on the right, and the 2/4th York and Lancasters with the 5th Yorkshire Light Infantry on the left, trampled down all opposition. The individual is almost lost to sight in the scale of such operations, but a sentence must be devoted to Sergeant Calvert of the last-named battalion, who attacked two machine-guns, bayoneted four and shot three of the crews, taking the rest prisoners. At 7.30, the western edge of the village of Havrincourt had fallen, but the fortified château on the south, in the area of the 186th Brigade, still held its own. It was attacked by the 2/4th West Riding Battalion, who had a most difficult task in the tangled gardens which surrounded the house. At the same time the 2/4th Hants pushed into the village and fought their way right through it. They had to sustain a heavy counter-attack delivered about 7 in the evening by the Twentieth Hanoverian Division, supported by a flight of low-flying aeroplanes. This attack was broken up with great loss by the steady fire of the men of Hampshire and Yorkshire.

Sept. 13-14.

In the early morning of September 13 the village was strongly attacked by the enemy, who effected a lodgment in the cemetery and pushed back the British line for 200 yards. A fine return was made by the 5th Devons of the 185th Brigade, who cleared the village once again. Two of the divisional machine-guns held out close to the posts occupied by the Germans—so close that the sergeant in charge shot the battalion leader of the enemy with his revolver. From this time the Sixty-second were left in possession of Havrincourt, which they had thus won for the second time, since it was carried by them in the Cambrai battle of November 20, 1917. General Braithwaite, who was the victor upon each occasion, remarked that if his men had to take it a third time they should, on the cup-tie principle, be allowed to keep it for ever.

Sept. 14-27.

Meanwhile the Second Division on the left had made its way slowly but without any serious check as far as London Trench, which brought them nearly level with the Sixty-second, while the Thirty-seventh in the south had captured Trescault and were also well up to the Hindenburg Line. There was no further serious fighting for several days on this front save that the 185th Brigade advanced its line to Triangle Wood on the morning of September 14. This attack was carried out by the 2/20th Londons and was completely successful, as was their subsequent defence against a brisk counter-attack. On September 16 the Sixty-second Division was relieved by the Third, and the Second Division by the Guards. There was no further fighting until September 18, that general day of battle, when a very severe German attack was made about 6 o'clock in the evening, which covered the whole front of the Third Division and involved the left of the Thirty-seventh Division in the area of the Fourth Corps. After a heavy bombardment there was a determined advance of infantry, having the recapture of Havrincourt for its objective. A number of low-flying aeroplanes helped the German infantry. The attack fell chiefly upon the 1st Scots Fusiliers and 2nd Royal Scots, and some gain was effected by a rush of bombers aided by flame-throwers, but they were finally held and eventually driven back, while 100 prisoners were retained. C Company of the Royal Scots particularly distinguished itself in this action, forming a solid nucleus of resistance round which the whole defence was organised. Nothing further of importance occurred until September 27, the day of the general advance, in this northern portion of the British line.

August 21.

In order to complete this account of the doings of Byng's Third Army from August 21 onwards, some account must now be given of what was originally the central unit, Harper's Fourth Corps, though its general progress has already been roughly defined by the detailed description of the two Corps on its flanks.

The first task set for this Corps on August 21 was to capture the general line between Irles in the south and Bihucourt in the north, while the flank of this main attack was to be guarded by a subsidiary advance along the valley of the Ancre, and between Puisieux and Miraumont. The first objective of the main attack was Bucquoy, Ablainzeville, and the important high ground to the immediate east of these villages.

The advance commenced in a thick mist, and was undertaken in the case of the main attack by Williams' Thirty-seventh English Division. It was completely successful, and aided by the fire of six heavy and fifteen field brigades of artillery, it swept over its first objectives, the tanks helping materially to break down the opposition. The moral effect of a tank in a fog can be pictured by the least imaginative. Two field-guns and many lighter pieces were taken. The veteran Fifth Division on the right and the Sixty-third Naval Division on the left then passed through the ranks of the Thirty-seventh to enlarge the opening that they had made, carrying the advance on to the limit of the field artillery barrage, and halting at last just west of Achiet-le-Petit. The naval men met with a blaze of machine-gun fire from the edge of Logeast Wood, but they rooted out the nests and occupied the position, though the passage through the tangled brushwood and trees disorganised the units, and progress became slow. The railway line ran right across the front, and this, as usual, had become a formidable and continuous obstacle, which could not be turned. The reserve brigade of the Fifth Division on the right carried Achiet-le-Petit, but could not get over the railway. The Sixty-third was also unable to reach the railway, and found a considerable concentration of Germans opposite to them in the brickworks and cemetery west of Achiet-le-Grand. The tanks had wandered off in the mist, and for the moment the advance had reached its limit. Many of the tanks, as the mist lifted, were hit by the anti-tank guns of the enemy, though some most gallantly crossed the railway line and penetrated the German positions, doing such harm as they could, until they were eventually destroyed.

Meanwhile, the subsidiary attack on the right flank had also been successful up to a point. The New Zealanders on the immediate south of the Fifth Division had gone forward in their usual workman-like fashion, and had taken Puisieux. Upon their right, and next to the Fifth Corps who were beginning their arduous crossing of the Ancre, was the Forty-second Division (Solly-Flood), an ex-Palestine unit of Lancashire Territorials which had won laurels in the March fighting. It had come away with a flying start, and had got as far as the important point named Beauregard Dovecote. There it remained until the early morning of August 22, when the enemy regained it by a spirited attack from a new division. The total effect of the day's work along the whole front of the Fourth Corps had been the capture of 1400 prisoners, of a number of guns, and of an extent of ground which was important, though less than had been hoped for. The main resistance had always been the railway, and the German guns behind it, so that to that extent his line was really inviolate. Indeed from his point of view the whole work of the Third Army on that date might be represented as an attack upon a false front, the real position remaining intact.