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.