August 26.
Meanwhile the Canadian Corps had quietly taken the place of Fergusson's Seventeenth Corps to the south of the Scarpe, pushing them to the south, and all was ready for the big battle which broke out on August 26, and was a continuation to the north of the large movement already going on down the line. In this important attack, the Third Canadian Division was on the left, and the Second on the right, the two of them bridging the space between the Scarpe and the left of the Third Army. It was stated by prisoners that the attack had been foreseen, and that they had withdrawn 2000 yards the day before. However that may be, everything went very well, and the men of the Dominion showed their usual determined valour. The 7th and 8th Canadian Brigades, just south of the river, swept along with hardly a check, save for a time when the 8th was held up behind Orange Hill. At 7.35, Monchy, important as a place of observation, was in British hands once more. At 10.45, the 4th Canadian Brigade had captured GuGuémappemappe, and in the afternoon, Wancourt Ridge had also fallen to the Second Canadian Division. Here, as elsewhere, a single day had given what weeks of effort had once failed to achieve; 2000 prisoners were taken.
On the north bank, the Fifty-first Division, which was now part of the Canadian Corps, made a similar advance, both the 152nd and 153rd Brigades sweeping forward, and occupying Rœux, Gavrelle and the Chemical Works, with little opposition. The Eighth Division was to the north of the Fifty-first, and it also pushed forward its line, its patrols occupying Oppy after dusk.
The Eighth Division, reconstituted under its veteran commander, General Heneker, after its murderous and heroic experience upon the Aisne, was the right-hand unit of Hunter-Weston's Eighth Corps, which was the next unit of the First Army. The front of this Corps was formed by the Twentieth Division in the north and the Eighth in the south, and its rôle at this period was to stand fast, but by a succession of well-conducted enterprises the Eighth Division was continually encroaching upon the German lines. Presently, as will be seen, when the line was advanced on the south, the Eighth Corps was unleashed and sprang forward in combination with the general advance on either flank. On its left, and following its general movements, was Holland's First Corps, which was allotted, after September 20, to the Fifth Army, so that instead of being Horne's northern unit it became the southern Corps of Birdwood.
August 27, 28.
On August 27 the Canadians went forward once more, the 9th Brigade on the left near the river, while the 4th and 5th were on the right. Again there was a day of steady advance, which was rather a slow pursuit than a battle. In the evening the line ran east of Cherisy, but west of Pelves and Haucourt. In the north the Fifty-first Division attacked Greenland Hill, which was a most important piece of high ground—so important that it may be said to be the point on which the whole great advance to the Canal du Nord pivoted. The attack was delivered with great spirit by the 7th Gordons and 6th Black Watch of the 153rd Brigade, but they were unable to get the summit; while the 6th Seaforths to the south of them were also held up by machine-gun fire. Some advance was made, however, by the 154th Brigade, which had now come in on the north of the line. That night the 25th Brigade of the Eighth Division took over this northern section.
August 28 saw the Canadians still continuing their slow but inexorable advance. On that morning their 7th Brigade took Pelves and Boiry. There were two strong counter-attacks upon the Second Canadian Division in the evening near Artillery Hill, and for a time the front line was pushed back, but it soon recovered and held firm. There was quiet now on the Canadian front, but on August 29 the 154th Brigade of the Highland Division made a fresh attack upon Greenland Hill, which was captured by the 4th Gordons and 7th Argyll and Sutherlands with only slight losses. This important success caused the evacuation by the enemy of several positions commanded by the hill, especially Delbar Wood. This capture screened the left flank of the Canadians and drew from their General a generous message of thanks, in which he said, "That your division after its continuous fighting for the last year was able to take and keep the strong position of Greenland Hill, testifies to the fact that the fighting qualities of the Fifty-first are second to none in the Allied armies."
August 30.
There were some changes of troops at this date in preparation for the big attack upon the Hindenburg switch line which was impending. The Twenty-second Corps (Godley) now formed on the left of the Canadians, took over the Fifty-first Division, and also occupied the south bank of the Scarpe with the Eleventh Division. It retained the Forty-ninth Division (Cameron) in reserve. On the other hand, the Fourth British Division was attached to the Canadians, and came into their centre at Remy and Haucourt. At dawn on August 30 the Canadian First Division attacked Upton Wood and the trenches near, with the object of straightening the line and maintaining close touch with the Seventeenth Corps on the right. This movement was splendidly successful, and 500 prisoners were taken. The Fourth British Division advanced at the same time and their line in the evening was just east of Eterpigny. Next day they were held up once at St. Servin Farm, but took it at the second attempt. Meanwhile, the Eleventh Division was moving steadily forward on the south bank of the river. It was relieved on October 1 by the Fifty-sixth London Division, acting under the Twenty-second Corps.
On September 1 the Canadian Corps was outside the Arras-Cambrai Road, with the Fourth British Division forming its left flank, the Fourth Canadian its centre, and the First Canadian on the right. It was a day of local attacks and bickerings, but great preparations were on foot for the morrow. The first light of dawn had hardly begun to glimmer in front of the eager lines of infantry before the signal was given for the advance upon the Drocourt-Quéant line. This line is not the main Hindenburg Line, but it is a northern extension of the Hindenburg system, and it may be said to cover the towns of Douai and Cambrai. The advance of the First Army was on a front of five brigades—one belonging to the British Fourth Division on the left, and two of each first line Canadian Division to their right. The general idea of the day's operations—among the most important of the war—was to break through the German line upon a narrow front, and afterwards to roll up the flanks of the enemy, both north and south. This having been done, the main attack was to push through, seize the higher ground overlooking the Canal du Nord, and if possible cross the Canal and seize the farther bank.