Hundreds of the biggest guns, together with the famous French “75’s” had been concentrated in position a few miles back. Aeroplane squadrons had been constantly patrolling the skies. Every branch of the Engineers had been brought up, and now those brave and intrepid men, the Pioneers, were adding the final touches to the preparations for their hazardous, self-sacrificing task.

For the Pioneers, if you did not know it before, go first of all when it is a concentrated attack upon a well fortified and entrenched position.

It is the Pioneers who pave the way, doing what previous artillery bombardment may have failed to do in cutting wire entanglements, etc.; theirs is the necessary preliminary work, in which, much of the time, they are open targets for the enemy fire.

And then come the engineers, bridging streams, cutting and blasting away earthen and concrete obstructions, filling in shell holes, levelling roads—making ready for the great attack in which every branch of the service on land will participate; infantry, cavalry, light artillery, tanks, trucks, ambulances, field hospitals, everything.

These were the things for which everyone was making ready at ten o’clock the following morning when the first actual order was received. It was an order which in no way affected the men and lesser officers directly, and yet it was one which marked the first step in the tremendous program.

Brigade, regimental and even battalion commanders, which is to say brigadier-generals, colonels, lieutenant-colonels and majors, were summoned to Division Headquarters.

There, as it soon became known, they met not only the major-general in command, but General Pershing himself. Unheralded, he had arrived by fast auto with the break of dawn, and since that time, as hundreds of maps spread out before them testified, he and the major-general had been in most important conference.

To Corporal Tom Walton fell the never-to-be-forgotten privilege of witnessing this historic sight.

His colonel’s aide arrived back from the conference a few moments after it had begun, to get some maps from the colonel’s quarters. He needed someone to help carry them over.

“Corporal Walton,” his direct commander’s voice called, “you will accompany and assist Lieutenant Behring.”