This is an illustrated, encyclopaedic data reference to all US Army World War 2 ground combat force units from battalion through division, 1939-1946. It includes weapons, equipment, vehicles, and combat photographs. It is thoroughly updated with newly uncovered unit data collected over the twenty years since publication of the original, "Order of Battle, US Army, World War 2". It includes: Units; Overseas Service; Ports of Embarkation; Insignia; Combat Narratives; Organisational Charts; Campaigns; Stateside Service; Post, Camps and Stations.