With full color maps and illustrations. Center of Military History publication CMH Pub 30-23-1. Army Historical Series. Captures the multifaceted development of the Armored Force from its inauspicious beginnings in World War 1 to its fully mature, operational status at the close of World War 2. Provides an excellent case study in force transformation. Gives attention to training maneuvers conducted in the interwar period. Source material includes reports, memorandums, and correspondence of the majors, lieutenant colonels, and colonels associated with armored development since World War I.