The gap was evidently wider than the Germans either anticipated or realized; otherwise the disaster might have been irretrievable. As it was, the situation remained precarious until the 27th, when a counter-attack in conjunction with the French recovered some of the ground, and a large portion of the sorely tried Canadian Division was relieved by the Lahore Indian Division. Altogether seven British divisions were involved in this hard-fought battle, the net result of which was to bring the Germans 2 miles nearer to Ypres on a 5-mile front, and to give the Allies a worse line to hold. Eight batteries of French field-guns were lost and four British guns of position. These last were recaptured by the Canadians, but the enemy had already destroyed them. In all the Allied casualties amounted to nearly 25,000. The Germans estimated theirs at 16,000. In his report on the gas-attack Sir John French declared that protest against this form of warfare would probably be useless, and Lord Kitchener intimated in the House of Lords on 18th May that retaliation might be inevitable. Respirators more or less effective were supplied to the troops, and the use of poison-gas, followed by liquid-fire—another German innovation—became permanent additions to the horrors of modern warfare.
Before the new battle round Ypres died down—it lasted, indeed, until the end of May—the storm centre shifted to the southern end of the British line, where it joined hands with the French left. Here General French began the battle of Festubert, undertaken to relieve the intense pressure on the troops at Ypres, but also serving as part of Joffre's general plan of attack in the direction of Lens and Lille. British and French alike were launched against the German lines on 9th May, the British taking the offensive between Rougebanc and Givenchy, and the French between Neuville St. Vaast and Notre Dame de Lorette. The renewed struggle for Ypres, however, had drawn heavily on the scanty British reserves of ammunition, and the preliminary bombardment of forty minutes proved wholly inadequate to crush the resistance offered by the enemy's numerous fortified posts when the First Army advanced to the attack. This disastrous engagement, in which the greatest bravery was displayed against overwhelming odds, cost over 12,000 casualties. It achieved nothing in the field, but the lessons which it taught led to the formation of the Coalition Government, with Mr. Lloyd George as Minister of Munitions. The second stage of the battle of Festubert, which began at midnight on 15th May, was more successful, the enemy's front-line trenches being captured on a front of 3000 yards; but the losses incurred in winning and holding the positions were disproportionately high.
The French effort began more auspiciously as a result of the longer and more intense bombardment which preceded their attack on the 9th, but the series of minor successes which they won round Souchez, after weeks of incessant fighting, made little real impression on the defences of Lens. The truth was that Germany had so expanded her war-material factories that, with the aid of the Austrians, she could turn out sufficient shells and guns for her main offensive on the Eastern front, and at the same time overweight the Allies in the West.
Throughout the summer the line, though never quiescent, and often breaking out in furious bombardments, minor attacks and counter-attacks, and raids on both sides, remained little altered. The hardest fighting of all was round the war-scarred salient of Ypres, still held, as in the first gas-attack, by the Second Army, to which some of 'Kitchener's Men' were now attached. It fell to this advance-guard of the New Army to bear the brunt of the first attack on the British with liquid-fire, the Germans, who had already used this new device of the flammenwerfer against the French, employing it in another desperate assault on the British lines round Hooge. The New Army units fought with almost incredible gallantry, but were blinded by the unexpected, burning sheets of flame, and while they were still blind the enemy charged and took the first-line trenches on a front of some 500 yards. The losses were avenged on 9th Aug., when the 6th Division recovered all the captured positions, and 400 yards of German trench into the bargain.
With the arrival of the reinforcing British divisions of the New Army, General French was able to take over some 17 miles of additional front, the British line thus extending over about 50 miles, with the Belgians on the left holding the remaining 18 miles to the sea. This still left the French army 500 miles to hold, from the British right to the Alps.
The summer of 1915 passed away without any great offensive on either side. The Germans, now at the flood-tide of their sweeping advance against Russia, were content to continue their vigorous offensive-defensive in the West. Besides the fighting already referred to, there was incessant warfare in the Argonne Forest, where the German Crown Prince was noisily active throughout the summer, threatening Verdun, but making no serious advance. The French continued the deadly trench-to-trench warfare in the Souchez area and the 'Labyrinth' region nearer Arras, and steadily tightened their hold on the reconquered corner of Alsace, consolidating their positions on the Hartmannsweilerkopf, which had been the scene of continuous fighting in the renewed advance towards Mulhouse. For the most part, however, the French, like the British, were now storing up reserves of ammunition and completing their dispositions for the joint offensive planned for the autumn, when the main objects of Joffre's general strategic idea for 1915 were for the first time clearly defined, though unattained.
A great Allied offensive in the West had become increasingly necessary in view of the prestige gained by the Central Powers, not only by their tremendous advance into Russia, but also by the Allies' disastrous campaign in Gallipoli, where the failure of the Suvla Bay landing—subsequently dealt with in our account of the operations against Turkey—had just given the enemy additional cause for rejoicing. Joffre's plan of attack, designed "to drive the Germans out of France", was not ripe for execution until towards the end of September. Even then, though General French had for months been gradually accumulating troops and ammunition for the blow—the British army now numbering nearly a million men—full strength in both respects was still only half developed.