the TypeXXI, while being a revolution in sub design, would not have made much difference in the atlantic war... like all so called super weapons, if they are not part of an effective deployment system, they would've been a spectacular misuse and waste of great technology...
and, while cracking the enigma code was definitely a big plus... the cards were slowly (maybe not so slowly) being stacked up against the nazi regime's war effort with advances in sonar and radar... as well as the attacks on the logistics centers required to support such a weapons system...
plus, when japan entered the war, the us was committed anyways...
also, the us wasn't about to let the brit islands fall, nor were they gonna sit back and let the soviets take over spoils in asia or europe... we were in it... like it or not...
cracking the enigma wasn't that significant of an event (not to downplay it though) as to change world history to the extent suggested... neither was the deployment of the XXI...
--Mike
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