of the rest of the battleground, the Flanders line would be highly elastic, but after pressure it would spring back into position with a deadly rebound.
The action began on 31st July, and resulted at first in a brilliant success. But with the attack the weather broke, and so made impossible the series of blows which we had planned. For a fortnight we were compelled to hold our hand; till the countryside grew drier, advance was a stark impossibility.
The second stage began on 16th August, and everywhere fell short of its main objective. The ground was sloppy and tangled; broken woods impeded our advance; and the whole front was dotted with pill-boxes, against which we had not yet discovered the proper weapon. The result was a serious British check. Fine brigades had been hurled in succession against a solid wall, and had been sorely battered. They felt that they were being sacrificed blindly; that every fight was a soldier's and not a general's fight; and that such sledge-hammer tactics could never solve the problem. For a moment there was a real wave of disheartenment in the British ranks.
Sir Douglas Haig took time to reorganize his front and prepare a new plan. Sir Herbert Plumer was brought farther north, and patiently grappled with the "pill-box" problem. He had them carefully reconnoitred, and by directing gun fire on each side enabled his troops to get round their undefended rear. Early in September the weather improved, the mud of the Salient hardened, and the streams became streams again, and not lagoons.
On 20th September the third attack was launched, and everywhere succeeded. It broke through the German defence in the Salient, and won the southern pivot, on which the security of the main Passchendaele Ridge depended. Few struggles in the campaign were more desperate or carried out on a more gruesome battlefield. The maze of quagmires, splintered woods, ruined husks of pill-boxes, water-filled shell-holes and foul creeks, which made up the land on both sides of the Menin road, was a sight which to most men must seem in the retrospect a fevered nightmare. The elements had blended with each other to make of it a limbo outside mortal experience and almost beyond human imagining.
But successful though the advance was, not even the first stage of the British plan had been reached. During the rest of September and October, however, attack followed attack, though the main objective was now out of the question. It was necessary to continue the battle for the sake of our Allies, who at the moment were hard pressed in other areas; and, in any case, it was desirable to complete the capture of the Passchendaele Ridge so as to give us a good winter position.
The last stages of this Third Battle of Ypres were probably the muddiest combats ever known in the history of war. It rained incessantly, sometimes quieting to a drizzle or a Scots mist, but relapsing into a downpour on any day fixed for our attack. The British movements became a barometer. Whenever it was more than usually tempestuous it was safe to assume that some hour of advance was near. The few rare hours of watery sunshine had no effect upon the irreclaimable bog. "You might as well," wrote one observer, "try to empty a bath by holding lighted matches over it."
On the 30th October our line was sufficiently far advanced for the attack on Passchendaele itself. On that day the Canadians, assisted by the Royal Naval Division and London Territorials, carried much of the Ridge, and won their way into the outskirts of Passchendaele village. Some days of dry weather followed, and early in the morning of 6th November the Canadians swept forward again and carried the whole main ridge of West Flanders. By this achievement the Salient, where for three years we had been at the mercy of the German guns, was no longer dominated by the enemy position.
The Third Battle of Ypres was strategically a British failure; we did not come within measurable distance of our main purpose. But that was due to no fault of generalship or fighting qualities, but to the malevolence of the weather in a country where the weather was all in all. We reckoned upon a normal August, and we did not get it. The sea of mud which lay around the Salient was the true defence of the enemy.
Ypres was to Britain what Verdun was to France—hallowed soil, which called forth the highest qualities of her people. It was a battleground where there could be no retreat without loss of honour. The armies which fought there in the Third Battle were very different from the few divisions which had held the fort during the earlier struggles. But there were links of connection. The Guards, by more than one fine advance, were recompensed for the awful tension of October 1914, when some of their best battalions had been destroyed; and it fell to Canada, by the victory of Passchendaele, to avenge the gas attack of April 1915. when only her dauntless two brigades stood between Ypres and the enemy.
CHAPTER IX.
THE TANKS AT CAMBRAI.
During the Battle of the Somme a new weapon had appeared on the Allied side. This was the Tank (so called because some unrevealing name had to be found for a device developed in secret). It was a machine shaped like a monstrous toad, which mounted machine-guns and light artillery, and could force its way through wire and parapets and walls, and go anywhere except in deep mud. Its main tactical use was to break down wire entanglements and to clear out redoubts and nests of machine-guns. When first used at the Somme the Tanks won a modified success, and in the following spring at Arras they fully justified themselves. Presently they began to develop into two types, one remaining heavy and slow and the other becoming a "whippet," a type which was easy to handle and attained a fair speed. Ultimately, as we shall see, they were to become the chief Allied weapon in breaking the enemy front, and also to perform the historic task of cavalry and go through the gaps which the infantry had made. In September 1917, while two British Armies were fighting desperately in the Ypres Salient for the Passchendaele Ridge, Sir Julian Byng's Third Army, on the chalky plateau of Picardy, was almost idle. An observer might have noticed that General Hugh Elles, the commander of the Tank Corps, was a frequent visitor to Sir Julian's headquarters at Albert. The same observer might have detected a curious self-consciousness during the following weeks at Tanks headquarters. Tanks officers, disguised in non-committal steel helmets and waterproofs, frequented the forward areas of the Third Army. Tanks motor-cars seemed suddenly to shed all distinguishing badges, and their drivers told lengthy and mendacious tales about their doings. Staff officers of the Tanks were never seen at any headquarters, but constantly in front-line trenches, where, when questioned, they found some difficulty in explaining their business. At the headquarters of one Tanks brigade there was a locked room, with "No Admittance" over the door, and inside—for the eye of the possible enemy spy—a quantity of carefully marked bogus maps. Some mystery was being hatched, but, though many hundreds suspected it, only a few knew the truth.
On the 20th October it had been decided to make a surprise attack towards Cambrai, and to prepare the way for the infantry by Tanks instead of guns. The Third Battle of Ypres had brought the reputation of these machines very low. They had been used in the bottomless mud of the Salient, where they had no chance of being successful, and the generals in command had reported adversely on their merits. It was argued that they could not negotiate bad ground, that the ground on a battlefield must always be bad, and that, consequently, they were of no use on the battlefield. The first statement was doubtful, and the second false; but certainly if all battles had been like the Third Battle of Ypres the conclusion would have been justified.
At Cambrai the Tanks were on their trial. It was their special "show," and if they failed now they would fail for good. Their commander, General Elles, took no chances. With three brigades of Tanks he was to break through the enemy's wire, cross the broad trenches of the Hindenburg Line, and open the way towards Cambrai for the two Army Corps following. The enemy defences were the strongest in the West. There were three trench lines, each of a width extending to 15 feet, and with an outpost line thrown forward as a screen. In front of the main line lay barbed wire at least 50 yards wide, which sometimes jutted out in bold salients flanked by machine-guns. It was calculated that to cut that wire with artillery would have taken five weeks
