The situation was still most critical. The French were sending troops, but with all possible resources utilized we were still gravely outnumbered, and the majority of the men were desperately weary from the Somme battle. On the 11th Sir Douglas Haig issued an Order of the Day, in which he appealed to his men to endure to the last. "There is no other course open to us than to fight it out. Every position must be held to the last man; there must be no retirement. With our backs to the wall and believing in the justice of our cause, each one of us must fight on to the end." Not less solemn was Sir Arthur Currie's charge to the Canadian Corps before they entered the battle. "Under the orders of your devoted officers in the coming battle you will advance or fall where you stand, facing the enemy. To those who fall I say, 'You will not die, but will step into immortality. Your mothers will not lament your fate, but will be proud to have borne such sons. Your names will be revered for ever and ever by your grateful country, and God will take you unto Himself.'" It is a charge which has the noble eloquence of Cromwell or Lincoln.
Within a week it seemed as if the enemy had succeeded. On the evening of 15th April the Germans entered Bailleul, and the next day we withdrew from the ground won in the Third Battle of Ypres to a position a mile east of that town. By the 17th the enemy was in both Meteren and Wytschaete, and this meant that the northern pillar of our defence had gone. The next step for the Germans was to seize Mont Kemmel, the highest ground between them and the Channel, and a position which would presently give them Hazebrouck.
The 17th and 18th of April were perhaps the most critical days of the whole battle. The enemy had reached his greatest strength, and the British troops were not yet reinforced at any point within sight of security. On the 17th the Germans had failed in an attack on the Belgians north of Ypres, and next day they failed no less conclusively in a movement on Béthune. This gave us a breathing space, and by the morning of Sunday, the 21st, French troops had taken over the defence of Mont Kemmel, and we had been able to relieve some of the divisions which had suffered most heavily.
That day saw the end of the main crisis of the battle. Mont Kemmel was lost and regained more than once, but the enemy was quickly becoming exhausted, and his gains, even when he made them, had no longer any strategic value. By the end of April he had employed in that one area of the line thirty-five fresh divisions, and nine which had been already in action. These troops were the cream of his army, and could not be replaced. Moreover, an odd feature had appeared in the last stages of the Lys battle. In March the enemy had succeeded in piercing and dislocating the British front by a new tactical method applied with masterly boldness and precision, the method which has been described as "infiltration."[#] But as the Lys battle dragged on the Germans seemed to have forgotten these new tactics, and to have fallen back upon their old methods of mass and shock. The reason was that the new tactics could only be used with specially trained troops, and with fresh troops; they put too great a strain on weary divisions and raw levies; therefore, as the enemy's losses grew, his tactics would deteriorate in the same proportion.
[#] See p. 36.
If we take 5th May as marking the close of the Battle of the Lys, we may pause to reflect upon the marvels of the forty-five preceding days, since the enemy torrent first broke west of St. Quentin. More history had been crowded into their span than into many a year of campaigning. They had seen the great German thrust for Amiens checked in the very moment of success. They had seen the last bold push for the Channel Ports held up for days by weak divisions which bent but did not break, and finally die away with its purpose still far from achievement. In those forty-five days divisions and brigades had been more than once destroyed as units, and always their sacrifice had been the salvation of the British front. The survivors had behind them such a record of fruitful service as the whole history of the war could scarcely parallel.
CHAPTER XII.
THE SECOND BATTLE OF THE MARNE.
The First Battle of the Marne meant the frustration of Germany's main battle purpose, and the disappearance for ever of her hope of a complete and decisive victory. The Second Battle of the Marne in July 1918 was the beginning of Germany's defeat. In both battles the armies of Britain contributed to victory, but in both battles, as was right and proper, the main work was done by the French, and with them lies the chief glory.
In March Haig had been forced back to the gate of Amiens, and Foch, at last appointed Commander-in-Chief of all the Allies, had for nearly a month looked into the eyes of defeat. But slowly the tide ebbed. Foch was able not only to repel the German assaults but to nurse and strengthen his own reserves. In spite of the desperate crises on the Lys and the Aisne midsummer found him rapidly growing in strength. And as the Allies grew, so the enemy declined.