It took a lot of reorganization, but the efforts paid off. Key point: Good organization and logistics helped America build a mighty fighting machine. Hitler did not stand a chance. The definitive combat unit of comparable strength among the forces of the world during the 20th century was the division. Not all divisions, however, have been of the same size. The number of men in Allied and Axis divisions during World War II varied considerably. The number of men in an American division also varied depending on the type of division, for example, infantry, airborne, light, mechanized, armored, o...