Viewing the subject from the side of the Allies, the author reviews four major achievements in World War II which had unexpected and even more dramatic consequences not discovered until much after the event. He also deals with the evaluation of some weapons, tactics and statistics in ways that are at odds with much of the conventional wisdom as well as with statements of fact that in retrospect are much different than the facts themselves. Finally, he describes some items that, if they are considered at all, are not discussed with the seriousness they deserve.