[Illustration: This picture shows the standardized style of building used in every army cantonment in the United States. The tar-paper structures in the foreground were used for storehouses and general out-buildings. In the background are the well-built barracks. The company "streets" run between them. Camp Devens, Mass.] To keep these cantonments clean and fit to live in, large numbers of sanitary engineers, medical officers, and scientific experts were kept busy planning and installing the most modern sanitation systems. To command this great army, the government built officers' camps where men best fitted were trained to be officers, and were then sent to the cantonments to help in changing the American citizen into a soldier. War was declared in April, and by the hot weather of summer America was sending troops by the tens of thousands to Europe. The wonderful way in which American shipbuilders had made it possible to transport these soldiers is told later. But before leaving the subject of raising an army, let us first see by means of figures just what the United States had accomplished in this work. In August, 1918, the overseas force alone was seven times as large as the entire United States army sixteen months before, at the declaration of war. In this time she had transported a million and a half troops overseas and had the same number on this side, with the numbers always increasing. In September, 1918, she had another draft and registration, calling men between the ages of 18 and 45. This gave thirteen million more men. The colleges of the country had suffered a great deal because of the two draft laws, as practically all men of college age were liable to military service. To overcome this difficulty, the government established in the fall of 1918, the Student Army Training Corps. This plan allowed all students of military age, who were physically fit, to enlist in the army and receive military training, and at the same time obtain a college education. From these men the government planned to choose future officer material. Although the war came to a close before the plan could be fully carried out, it gave every promise of being a success. It must be evident that perhaps even a greater problem than raising the army was how it was to be transported to Europe. At the beginning of the war, the United States had no ships to use for her necessary task of transporting men and supplies. The ships that were sailing from her ports were all doing their capacity work and could not be used for the new demands. The Shipping Board immediately looked around for yards to place orders for new ships; but there were no yards to fill the orders, as the few the United States had were all overburdened with work. The only remaining solution of the problem was to build new yards. America did it.