The Korean War was brutal and frustrating, and the commanders and soldiers of the Eighth US Army showed ingenuity and flexibility as they adapted to a war they had not expected to fight. Each phase of the war brought some innovation in the organization of US ground forces, and by the end of the war, Eighth Army was the largest field army in US history. In this book. Don Boose studies the combat mission, organization and evolution of the Eighth US Army in Korea and its 300,000 US ground forces, through highly detailed orders of battle, tables of organization and equipment, and examinations of crucial aspects such as doctrine, training, and tactics.