In the Battle of Bapaume (August 21st-September 1st) the Third and Fourth British Armies, twenty-three divisions against thirty-five German divisions, drove the enemy from one side of the old Somme battle-field to the other, recovered all the ground lost in the spring, and took 34,000 prisoners and 270 guns. The enemy's morale was now failing; surrenders became frequent, and there were many signs of the exhaustion of the German reserves. And again, by the turning of his line, large tracts of territory were recovered almost without fighting. By September 6th, five months after we had stood "with our backs to the wall" in defence of the Channel ports, the Lys salient had disappeared, and the old Ypres line was almost restored.
In the Battle of the Scarpe (August 26th-September 3rd) General Horne's First Army, with the Canadian Corps and the Highlanders in its ranks, drove eastwards, north and south of the Scarpe, till they had come within striking distance of the Drocourt-Quéant line. In twelve hours, on the 2nd of September, the Canadian Corps, with forty tanks, Canadian cavalry and armoured cars, had captured "the whole of the elaborate system of wire, trenches, and strong points," which runs north-west from the Hindenburg line proper to the Lens defences at Drocourt; while the 17th Corps attacked the triangle of fortifications marking the junction of the Drocourt-Quéant line with the Hindenburg line proper, and cleared it magnificently, the 52nd (Lowland) Division especially distinguishing itself. There was "stern fighting" further south that day, right down to the neighbourhood of Peronne; but during the night the enemy "struck his tents," and began a hasty retreat to the line of the Canal du Nord. Sixteen thousand prisoners and 200 guns had been the spoil of the battle.
The Battle of Havrincourt (September 12th-18th) was a struggle for the outer defences of the Hindenburg line, which had to be carried before the line itself could be dealt with. Six days secured the positions wanted for the final attack, and in those six days fifteen British divisions had defeated twenty German divisions, and captured nearly 12,000 prisoners and 100 guns.
That rapid summary has brought me back to the point from which I started. In three months and a half the "mighty conflict," in which, on the British side, something short of 700,000 bayonets were engaged, had rushed on from victory to victory; Foch and Haig working together in an ideal marriage of minds and resources; the attack retaining everywhere by the help of the tanks—of which, in the Battle of Amiens, General Rawlinson had 400 under his command—the elements of surprise and mobility. The harassed enemy would find himself hard pressed in a particular section, driven to retreat, with heavy losses in ground, guns and prisoners; and then, as soon as he had discovered a line on which to stand and had thrown in his reserves, the attack would be broken off, only to begin again elsewhere, and with the same energy, unexpectedness, and success. British Staff work and British tactics were at their highest point of excellence, and the spirit of the men, fanned by that breeze which Victory and Hope bring with them, were, in the Commander-in-Chief's word, "magnificent."
And so we come to the evening of the 26th of September. Along these hill-sides, where we stand, on the west side of the Canal du Nord, lay Sir Julian Byng and the Third Army. To his right, on the south-east, was General Rawlinson, facing the strongest portion of the Hindenburg line, with two American divisions, led by Major-General Read, under his command; while on his left, and to the north, the First Army, under General Home, held the line along the Canal du Nord, and the marshes of the Sensée.
The most critical moment in the campaign had arrived. For in the assault on the Hindenburg line heavy risks had to be run. It is clear, I think, from the wording of Marshal Haig's dispatch, that in respect to the attack he took a special responsibility, which was abundantly vindicated by the event. The British War Cabinet was extremely anxious; the French Generalissimo was content to leave it to the British Commander-in-Chief; and Sir Douglas Haig, confident "that the British attack was the essential part of the general scheme, and that the moment was favourable," had the decision to make, and made it as we know. It is evident also from the dispatch that Sir Douglas was quite aware, not only of the military, but of the political risk. "The political effects of an unsuccessful attack upon a position so well known as the Hindenburg line would be large, and would go far to revive the declining morale, not only of the German Army, but of the German people." This aspect of the matter must, of course, have been terribly present to the mind of the British War Cabinet.
Moreover, the British Armies had been fighting continuously for nearly two months, and their losses, though small in proportion to what had been gained and to the prisoners taken, were still considerable.
Nevertheless, with all these considerations in mind, "I decided," says General Haig, "to proceed with the attack."[[6] ]
There lie before me a Memorandum, by an officer of the General Staff, on the Hindenburg line, drawn up about a month after the capture of the main section of it, and also a German report, made by a German officer in the spring of 1917. The great fortified system, as it subsequently became, was then incomplete. It was begun late in 1916, when, after the battle of the Somme, the German High Command had determined on the retreat which was carried out in February and March of the following year. It was dug by Russian prisoners, and the forced labour of French and Belgian peasants. The best engineering and tactical brains of the German Army went to its planning; and both officers and men believed it to be impregnable. The whole vast system was from four miles to seven miles deep, one interlocked and inter-communicating system of trenches, gun emplacements, machine-gun positions, fortified villages, and the rest, running from north-west to south-east across France, behind the German lines. In front of the British forces, writes an officer of the First Army, before the capture of the Drocourt-Quéant portion of the line, ran "line upon line, mile upon mile, of defences such as had never before been imagined; system after complicated system of trenches, protected with machine-gun positions, with trench mortars, manned by a highly-trained infantry, and by machine-gunners unsurpassed for skill and courage. The whole was supported by artillery of all calibres. The defences were the result of long-trained thought and of huge work. They had been there unbroken for years; and they had been constantly improved and further organised." And the great canals—the Canal du Nord and the Scheldt Canal, but especially the latter, were worked into the system with great skill, and strongly fortified. It is evident indeed that the mere existence of this fortified line gave a certain high confidence to the German Army, and that when it was captured, that confidence, already severely shaken, finally crumbled and broke. Indeed, by the time the British Armies had captured the covering portions of the line, and stood in front of the line itself, the morale of the German Army as a whole was no longer equal to holding it. For our casualties in taking it, though severe, were far less than we had suffered in the battle of the Scarpe; and one detects in some of our reports, when the victory was won, a certain amazement that we had been let off—comparatively—so lightly. Nevertheless, if there had been any failure in attack, or preparation, or leadership, we should have paid dearly for it; and a rally on the Hindenburg line, had we allowed the enemy any chance of it, might have prolonged the war for months. But there was no failure, and there was no rally. Never had our tried Army leaders, General Horne, General Byng, and General Rawlinson carried out more brilliantly the general scheme of the two supreme Commanders; never was the Staff work better; never were the subordinate services more faultlessly efficient. An American officer who had served with distinction in the British Army before the entry of his own country into the war, spoke to me in Paris with enthusiasm of the British Staff work during this three months' advance. "It was simply marvellous!—People don't understand." "Everything was ready," writes an eye-witness of the First Army.[[7] ] The rapidity of our advance completely surprised the enemy, some of whose batteries were captured as they were coming into action. Pontoon and trestle bridges were laid across the canal with lightning speed. The engineers, coming close behind the firing line, brought up the railways, light and heavy, as though by magic—built bridges, repaired roads. The Intelligence Staff, in the midst of all this rapid movement "gathered and forwarded information of the enemy's forces in front, his divisions, his reserves, his intentions." Telephones and telegraphs were following fast on the advance, connecting every department, whether stationary or still on the move. News was coming in at every moment—of advances, captures, possibilities in new country, casualties, needs. All these were being considered and collated by the Staff, decisions taken and orders sent out.
Meanwhile divisions were being relieved, billets arranged for, transport organised along the few practicable roads. Ambulances were coming and going. Petrol must be accessible everywhere; breakdown gangs and repair lorries must be ready always to clear roads, and mend bridges. And the men doing these jobs must be handled, fed, and directed, as well as the fighting line.