This book is the most comprehensive and detailed treatment of the origins, designs, and symbolism for each organizational shoulder sleeve insignia of the American Army in World War I ever published. Covered are: the organization, combat history/battle participation of the combat forces (Armies, Corps, and the Regular, National Guard and National Army Divisions), supporting organizations of the Services of Supply, and the special troops including the Army Air Service and the Army of Occupation. Source: OpenLibrary