On September 27 Harper's Fourth Corps had been given the task to capture Beauchamp Ridge and Highland Ridge, and clear the front system of the Hindenburg Line as far as the Couillet valley. The assault was launched at 5.20 in the morning. The Fifth Division on the right was from the outset sadly hampered by the fire from African Trench, which struck upon its flank and inflicted heavy losses. The division showed its usual gallantry, but the position was an impossible one until the Fifth Corps got farther forward. The left of the division, however, and the Forty-second Division made good progress, though the fighting was very severe about Beauchamp, which was taken but could not be held, as a fresh German division, advancing about 7 o'clock in the evening, drove the defenders back to the west of it. The success of the Sixth Corps in the north, however, at Flesquières, had an encouraging effect upon the whole line, and about 2.30 P.M. of September 28 both the Fifth and Forty-second Divisions came on once more, the latter being particularly successful in getting prisoners and guns. The Fifth Division got Beauchamp and Highland Ridge, but was still held up on the right. By evening the line was well forward on the western slopes of Welsh Ridge, and some 1700 prisoners had come in. It was clear that the German line was sagging, so in order to press the advantage General Harper ordered up Russell's New Zealanders to carry the battle on through the night. There could be no more stringent test of the quality and discipline of troops, for the advance had to be made over unknown country covered with trenches and wire entanglements, with only a fitful, sinking moon to guide them. At 3 A.M. of a dark, cold night the splendid Colonials passed through the ranks of the Forty-second Division and, driving forward, thrust the enemy off Welsh Ridge and Bonavis Ridge beyond it, captured 1600 prisoners, and made good the line of the Canal de l'Escaut. North and South Island brigades kept line in the advance. More than thirty guns were among the trophies of this magnificent achievement. The Fifth Division on their right swept forward at the same time near La Vacquerie, but as Gonnelieu upon their flank had not yet been captured by the Fifth Corps, their attack was limited on that side. This was remedied shortly after dawn, when the Fifth Division, weary as it was, cleared their own right flank, captured Gonnelieu, and finally took Banteux with 250 prisoners. The indefatigable New Zealanders had also gone forward after dawn as blithely as though it was their first attack, clearing the whole of the west bank of the Canal, and penetrating at one time into Crevecœur, where, however, they were unable to remain. They did great work here, however, by holding and partly saving the bridge, all others having been destroyed, and establishing some sort of bridgehead.

The total result of these attacks since September 27 on the front of the Fourth Corps had been the capture of the whole front system of the Hindenburg Line from Havrincourt Wood to the Canal, and the capture of 40 guns with 4000 prisoners. Beyond the Canal, however, lay formidable dangers. Only the Crevecœur bridge remained British. Beyond was a strongly-wired line of trenches known as the Beaurevoir-Masnières line, which ran roughly southwards from Crevecœur. On October 1 the New Zealanders had got a footing, however, in Crevecœur, and had begun to push troops over the bridge, but it was desperate work, and the attacking brigade suffered heavy losses. It was, however, work of the first importance, as it turned the whole of the Beaurevoir line. There we may leave them, level with the Fifth Corps on their right, while we turn to follow the progress of the Sixth Corps to the north, which completes our survey of the Third Army.

The old Third Division—the "Iron" Division, as its admirers had begun to call it—attacked on the right, and the Guards on the left. Deverell's men went forward in splendid form, the 8th and 9th Brigades overrunning the first objectives, and the 76th passing through them to the further positions. They captured Flesquières, the village which had held us up in the Cambrai battle, and by the afternoon they were east of Ribecourt, with 1000 prisoners trailing back to the rear. The Guards meanwhile, with the 2nd Brigade in front, had some very tough work at the onset, but fought their way forward, and were succeeded by the 1st Brigade who had reached by the afternoon the old British front line. Continuing from here they captured Orival Wood, and reached Premy Chapel, though this farthest point could not be maintained, as the party which had won it had lost touch with the main body. The whole advance represented a notable gain of ground. The losses were heavy, and were partly due to the fact that the flank of the Guards passed Graincourt before the Fifty-seventh Division in the Seventeenth Corps had captured that place, so that they were exposed to heavy fire. Even the Guards have seldom been in a hotter corner or shown more conspicuous examples of personal courage than during this long and trying day, which brought three Victoria Crosses to the battalions engaged. Lord Gort, who commanded the 1st Grenadiers, the leading unit of the 3rd Brigade, was wounded as the troops formed up, but took no notice of his injury, led on in the advance upon the Canal, was wounded again, lay for a time half unconscious upon a stretcher, struggled once more to his feet, and continued to lead his victorious Guardsmen through a hellish fire with the final result of large captures of the men and guns who were opposing them. The crossing of the Canal was signalised also by a remarkable exploit by Captain Frisby and Corporal Jackson, who, with two other Coldstream Guardsmen, climbed down one side and up the other of the dry Canal in order to capture a machine-gun with a crew of nine who were lying amid the broken end of a bridge on the farther bank. Jackson unhappily did not survive to receive the Cross which he had won.

In the meantime the Sixty-second Division, now under General Whigham, passed through the Third Division, and continued their victorious career. Two companies of the 8th West Yorkshires got forward as far as the north-west outskirts of Marcoing and Nine Wood, but were exposed to a raking fire from the high ground on the south side of the Ribecourt valley, so had finally to fall back. That night the Sixty-second continued to hold its advanced line while the Second Division took the place of the Guards, and all was ready for the further advance next morning.

On September 28 the Sixty-second dashed forward as soon as it was light, and were soon in possession of Marcoing. There was no severe resistance. The Second Division on the left kept well in line with the Yorkshiremen, and were soon the masters of Nine Wood. By 10 o'clock the steady flow of the British infantry had enveloped Marcoing Copse, and the 186th Brigade had reached the Canal, where several bridges were found to be still intact. Noyelles had fallen to the Second Division, who were now fighting over the ground which they had held in the old Bourlon days, only nine months ago in time, and yet seeming so far off on account of the great succession of events which had elapsed. Some attempts were made to get across the Canal, but the Germans were there in strength, and nothing could be done without deliberate preparation. In the evening the Sixty-second extended its boundaries, and consolidated what it held. A small party of the Second Division got across the Canal during the night, but were unable to establish any permanent bridge-head. In the morning of September 29, however, one brigade of this division made a lodgment upon the farther side, and remained there, though with wire and machine-guns before them. Pontoons were brought up during the day and many bridges thrown across. The Sixty-second meanwhile had cleared Les Rues Vertes and Masnières and was well to the east of those villages.

No progress was made on September 30, and the day was mainly spent in strenuous preparations by General Harper for his renewed advance. The Sixty-second Division cleared some more ground, and the Second Division failed in a village attack, but neither movement was important. During the evening the Third Division was brought forward on the right and took the place of the Sixty-second, so that they might advance next morning in conjunction with the New Zealanders on their right. This was duly carried out, the 5th Brigade leading on the left, and the 76th on the right. It was a day of heavy fighting and of stout resistance. The immediate object was the capture of Rumilly, which was entered, but could not be entirely cleared by the 76th Brigade. The 5th Brigade found Mont sur l'Œuvre, which faced them, a particularly tough proposition, and could make no headway. Altogether the losses on this day were greater than the gains, but the troops were undismayed and eager to get forward again on the morrow.

In the morning of October 1 they came back to their work, the 5th Brigade still carrying on, while the 8th Brigade took the place of the 76th. By 10 o'clock Rumilly had fallen, which gave the British a most important point as regards the passages over the river and canal. It took a great deal of clearing, for it was honeycombed with cellars and dug-outs, and there were continual outflames of unexpected fire. Before evening it was solidly British. No action of importance took place during the next few days, and the 4th of October found the Sixth Corps in the same position as the rest of Byng's Army, solidly established upon the western bank of the Escaut Canal and River, and with some bridge-heads on the farther side.

On September 27 Fergusson's Seventeenth Corps, which had done such splendid work in breaking a section of the main Hindenburg Line on September 2, was called into vigorous action once more. Its rôle was to advance in the general attack which was made on that date by the First and Third Armies in order to drive the enemy over the Canal de l'Escaut. The Fifty-second Lowland Scottish Territorial Division was on the right of the Seventeenth Corps, and the Sixty-third Naval Division on the left, while the Fifty-seventh Lancashire Territorials had been assigned the duty of following up the initial advance, and passing through the Sixty-third Division to reach the final objective. On the immediate right of the Corps were the Guards Division of the Sixth Corps, while on the left were the Fourth Canadians. The first line of objectives was the Hindenburg support line, the second included the villages of Anneux and Graincourt, while the third, if it could indeed be attained, would include Fontaine, Cantaing, and the west edge of La Folie Wood.

A very desperate day of fighting lay ahead of the Seventeenth Corps before this ambitious programme could be carried through, and yet the fire and ardour of the troops carried them eventually to the farthest limit. The 156th Brigade crossed the Canal du Nord on the right of the Sixty-third Division, in spite of clouds of gas and very heavy shelling upon their places of assembly. The 4th Royal Scots led the advance, and were soon in the first objective. Here they were heavily attacked, however, and there was no further forward movement until the 7th Scottish Rifles came up to thicken the line. Meanwhile the 157th Brigade was dealing with that portion of the Hindenburg Line which was west of the Canal, their operations being on the extreme right flank of the Corps in close liaison with the Guards. This heavy work fell upon the 6th Highland Light Infantry aided by three tanks, and they got well forward, but the 7th Highland Light Infantry on their left were badly held up by thick wire and impossible conditions. The 7th Scottish Rifles in the north had more success, however, and they now worked south, which gave invaluable help to their comrades in that quarter. Before midday all the ground east of the Canal attacked by the 156th Brigade, between the Mœuvres-Graincourt Road and the Bapaume-Cambrai Road, was in the possession of the Scottish infantry.