We may have a comparison in marching behind a road sprinkler, with orders to keep just out of reach of its spray, which will be obeyed if the spray consist of nitric acid instead of water. The more guns the stronger the shield. We could never have an excess of guns as Grant had at the outset of the Wilderness campaign, when he sent many batteries of the short-range pieces of those days to the rear for want of room on a narrow front in which to maneuver them. Cæsar applied the first barrage in France in his tactical use of the shields of his legions, who owed their success to systematic training no less than we in the Meuse-Argonne. His men had to carry their own shields; the modern soldier has enough to carry without carrying his. Suspense was most taut, it was agonizing, as every soldier knows, in the waiting hours ticking away into waiting minutes before the charge. As the final minute approached, the veteran, as a connoisseur in death's symbols, might find assurance in the strength, and apprehension in the weakness, of the supporting barrage laid down on the enemy trenches. Those of our men who had not been in battle before could have no such prescience. They did know that when they left their trenches the full length of their bodies would be exposed. They would march, rifle in hand, without firing, while only the shield of the shells from friendly guns screaming over their heads--the greater the volume, the sweeter the music--could silence the fire of rifles and machine-guns which had them at merciless point-blank range. Instantly they climbed "over the top," anticipation became realization. One ceased to listen to his heart-beats. The emotion became that of action. Suspense became objective, merged in responsibility for every man in watching where he stepped as he moved toward his goal, and for every captain and lieutenant in directing his company or platoon.