The role of the War Department, Manhattan District, and other Army agencies and individuals from 1939 through World War II in developing and employing the atomic bomb.

The army and the atomic energy program, 1939-1942 -- Establishing the Manhattan district -- First steps for weapon development -- General Groves takes command -- Organizing for production -- The electromagnetic process -- The gaseous diffusion process -- The liquid thermal diffusion process -- The pile process -- Anglo-American collaboration -- Security -- Foreign intelligence operations -- The raw materials program -- The feed materials program -- Land acquisition -- Manpower procurement -- Manpower conservation -- Electric power -- Communications and transportation -- Health and safety -- The atomic communities in Tennessee -- The atomic communities in Washington state -- The atomic communities in New Mexico -- The Los Alamos weapon program -- Weapon development and testing -- The atomic bombing of Japan -- The atomic age and its problems -- The army and the atomic energy program, 1945-1947.