As it developed, the first thrust was made in the north, with Ypres as the apparent objective; although after the first few days of the drive it became apparent that Hindenburg’s real plan was to get behind Paris from the north, after driving a wedge between the French and British armies. This, through the ablest of strategy, Field Marshal Haig was able to prevent.

Bailleul, Lens and other important railroad centers fell to the Germans in the second great enemy drive of the war. Suddenly, when apparently checked in the north, the enemy struck farther south, capturing Bapaume, Albert, Peronne and other important towns and villages.

When the Allied line at last held there, the attack was pressed against Ypres.

But this second drive was to fail as had all others, with a terrible loss to the Germans in manpower. Marshal Foch sacrificed ground to save lives, while, on the other hand, the German high command threw their men forward with an utter disregard for loss of life.

To Hal and Chester, after their return from No Man’s Land on the night before the opening of the German advance, it seemed that they had just closed their eyes when they were awakened by a sudden loud detonation apparently in their very ears.

As both lads jumped to their feet they were borne down by an avalanche of dirt and concrete. Although neither lad knew at that moment what had happened, a German bomb had burst squarely over their dugout, shattering the little place.

The boys slept in improvised bunks close to each other, and in jumping to their feet, they came closer together. They lay on the floor face down as the debris continued to rain on them. For the moment neither was able to speak.

At last the shower of debris ceased, and Hal made an effort to rise. He dropped down to the floor again suddenly with an exclamation.

“What’s the matter?” asked Chester, sitting up.

“Matter is,” said Hal, “that I bumped my head. Seems like the roof has fallen in.”