A Command Post at War is a unique story about an American field army headquarters and its organization and role in World War II, a perspective that has received little attention by historians until now. David W. Hogan Jr. examines the First Army headquarters's response to the test of army-level command during the period from its activation in October 1943 to V-E Day in May 1945. Focusing on the operational level, the level between the grand strategy of nations and theaters and the tactical combat of corps and smaller units, Hogan analyzes the operations, intelligence, logistical, and...