The sound seemed to indicate that the planes were flying low. The American ranks knew that something was going on immediately above them. They did not know what it was, but it seems needless to state that they wanted to know. Still the ranks stood as stiff as rows of clay-coloured statues. An almost irresistible impulse to look upward, a strong instinctive urging to see the danger that impended, and the stern regulations of "eyes front" that goes with the command "attention," comprised the elements of conflict that went on in each of the thousand heads in that battalion line. In front of each platoon, the lieutenants and captains stood with the same rigid eyes front facing the men. If one of the company officers had relaxed to the extent of taking one fleeting upward glance, it is doubtful whether the men could have further resisted the same inclination, but not a man shifted his gaze from the direction prescribed by the last command. One plane passed closely overhead and nothing happened. Three more followed and still no bombs fell, and then the tense incident was closed by the calling out of the order of the march and, in squads of four, the battalion wheeled into the road and marched back to billets. As one company went by singing (talking was permitted upon the freedom of routstep), I heard one of the men say that he had thought all along that the officers would not have made them stand there at attention if the danger had not been over. "As far as I knew, it was over," a comrade added. "It was right over my head." And in this light manner the men forgot the incident as they resumed their marching song. When Mr. W. Hollenzollern of Potsdam put singing lessons in the curriculum of his soldiers' training, a tremor of military giggling was heard around the world. But in August, 1914, when Mars smiled at the sight of those same soldiers, marching across the frontiers east, south and west, under their throaty barrage of "Deutschland, Deutschland, Ueber Alles," the derisive giggles completely died out. It immediately became a case of he who laughs first, lives to yodel. The American forces then in training took advantage of this. They not only began to sing as they trained, but they actually began to be trained to sing. Numerous company commanders who had held strong opinions against this vocal soldiering, changed their minds and expressed the new found conviction that the day was past when singing armies could be compared solely with male coryphees who hold positions well down stage and clink empty flagons of brown October ale. "It's a great idea," a company commander told me. "We learned it from the Blue Devils. They are the toughest set of undersized gentry that I have run into in France. They have forearms as big as three-inch shells, and as hard. Their favourite pastime is juggling hand-grenades that can't possibly explode unless they just lightly touch one another.