This book is a re-issue of the War Department's September 1943 edition of TM 9-2800. This technical manual was the primary US Army reference work of the period and listed data and illustrations of all US Army vehicles in operation at that time. This edition includes a new supplement that contains details of additional US Army vehicles that were omitted from the September 1943 edition. As a further aid, the nomenclature of a number of vehicles has been updated.