The War Department and the Army underwent a radical reorganization three months after the United States entered World War II. That reorganization consolidated the undeployed forces of the Army in the continental United States under three major commands-the Army Ground Forces (AGF), the Army Air Forces, and the Services of Supply (later the Army Service Forces). It also vested in the commanders of the first two of these great commands the responsibilities which had formerly been exercised by the chiefs of the arms and made these commanders responsible for the organization and training of the combat forces of the Army. These volumes, written during and immediately after the war by historians in the Headquarters, AGF, discuss the exercise of those responsibilities by that headquarters insofar as they pertained to the size and organization of the ground combat forces.
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