Adolf Hitler, who a bare six months before had faced only a beleaguered Britain in a war which seemed to him as good as won, now, by deliberate choice, had arrayed against him the three greatest industrial powers in the world in a struggle in which military might depended largely, in the long run, on economic strength. Those three enemy countries together also had a great preponderance of manpower over the three Axis nations. Neither Hitler nor his generals nor his admirals seem to have weighed those sobering facts on that eventful December day as the year 1941 drew toward a close.