The 'defence in depth,' practised to some extent at Arras, had become the enemy's reply to our destruction by artillery of the trench systems on which, earlier in the war, he had relied with confidence. Destruction of prepared positions had reached so absolute a stage that the old arguments of wire and machine-guns brought up from deep dug-outs to fire over parapets, were no longer present. The ground to a distance of several thousand yards behind the enemy's front line could be, and had been, churned and rechurned into one brown expanse. For four miles east of Ypres there was no green space and hardly a yard of ground without its shell-hole. Positions where the enemy held out consisted in groups of concrete 'pill-boxes,' which had been made from Belgian gravel and cement in partial anticipation of this result of the artillery war. They in all cases were carefully sited and so small (being designed to hold machine-guns and their teams) that their destruction by our heavy shells was almost impossible. These 'pill-boxes' were also so designed as to support each other, that is to say, if one of them were captured, the fire of others on its flanks often compelled the captors to yield it up. Garrisons were provided from the élite of the German army. One cannot but admire the steadfastness with which, during this phase of warfare, these solitary strongholds held out. Indeed, the only way to cope with this defence was to press an advance on a wide front to such a depth as to reduce the entire area in which these pill-boxes lay into our possession. By attacking spasmodically we played the enemy's game.

Our methods of attack which had been practised through the spring and summer still consisted, broadly speaking, in the advance of lines of Infantry behind a creeping barrage. These lines were too often held up by pill-boxes, against which the creeping barrage was ineffectual, and once delay which had not been calculated on occurred, the creeping barrage was proved doubly useless, for it had outdistanced the speed of the advance. The change in tactics necessary to reduce these concrete strongholds was soon appreciated, but troops who had been trained in the older methods were slow, in action, to adopt the new ones requisite. Partly from such a reason the 61st Division scored little success against the pill-box defence, but lack of tangible results was not joined with lack of honest attempts. The mud, the nibbling tactics passed down from above, inadequate co-operation by the divisions fighting side by side with us, and the failure of our artillery to hit the pill-boxes which we had hoped could be put out of action by our heavy shells, further combined to paralyse efforts which, had they been directed to more easy tasks, would now, as often, have earned for the Division the highest military success.

Chapter XI.

THE ATTACK ON HILL 35,

September, 1917.

Iberian, Hill 35, and Gallipoli. — The Battalion ordered to make the seventh attempt against Hill 35. — The task. — A and D Companies selected. — The assembly position. — Gassed by our own side. — Waiting for zero. — The attack. — Considerations governing its failure. — The Battalion quits the Ypres battlefield.

'At 4 p.m.' said the 61st Divisional Summary for the twenty-four hours ending 12 noon, September 11, 1917, 'we attacked the Battery Position on Hill 35. This attack was not successful.' A grim epitaph. The terse formula, as though wasted words must not follow wasted lives, was the official record of the seventh attempt to storm Hill 35.

Against the concrete gunpits which crowned this insignificant ridge the waves of our advance on July 31 had lapped in vain. Minor attacks designed to take Gallipoli, a German stronghold set behind the ridge, and against the sister position of Iberian on its flank, proved throughout August some of the most costly failures in the 5th Army operations. The defence of the three strongholds, Iberian, Hill 35, and Gallipoli provided a striking example of German stubbornness and skill, but added an object-lesson in the squandering of our efforts in attack. Operations upon a general scale having failed to capture all three, it was fantastically hoped that each could be reduced separately. Iberian, Hill 35, and Gallipoli supported one another, nor was it feasible to hold any without holding all. Yet to take Hill 35 on September 9 the 2/4th Oxfords were specially selected. The spirit of A and D Companies, chosen by Colonel Wetherall for the attack, was excellent. We confidently believed that we could succeed where others failed. Optimism, so vital an ingredient in morale, was a powerful assistant to the English Army. It was fostered, perhaps unconsciously, throughout the war by the cheerful attitude preserved by our Generals and staff, but its foundation lay in our great system of supply. The A.S.C., which helped to win our victories, helped, too, to temper our defeats.