'The Wehrmacht at War 1939 -1945'is the culmination of twenty five years of research and three years of writing, and is a unique, in-depth presentation of the order of battle and commanders of the German Army ground forces during World War II. Although there are numerous other books that have been published on the order of battle of the German Army, none contain the depth of detail concerning the commanders of the units and the biographies of the Generals that are included in this work. Indeed, it was with the express purpose of filling this gap in information that existed on the subject that this book was written.