Any reader, writer, or researcher will prize this one-of-a-kind guide to the U.S. Army ground force organization that won World War II. This encyclopedia contains a wealth of information that esteemed military historian Russell F. Weigley calls "indispensable," but it is more than just a list of thousands of units. It contains summarized tables of organization and equipment and charts detailing the mobilization and expansion of the major units. It lists the important dates and locations of each unit, including ports of embarkation and debarkation, campaigns participated in, and more. And it contains valuable narrative histories of the divisions and regiments, enabling the reader at a glance to trace the movements, stations, and actions of these units--and making this an essential reference.