A concise panoramic account of the United States' mobilization and conduct during the world war, tracing the rapid enlargement and training of land, sea, and air forces and the creation of munitions, medical, and welfare systems for troops. It outlines logistics and transportation efforts to sustain forces overseas, naval cooperation and convoy operations, and the emergence of military aviation. The civilian side is described through financing, industrial conversion, food and fuel management, labor, women's wartime work, public information, and volunteer relief services. The narrative emphasizes organization, practical measures, and the popular spirit that animated the national effort.