This would seem to seriously complicate British efforts in North Africa.
Worse still is the effect on Brit shipping if U-boats base out of Dakar.


RN was already stretched thin...
There's also the jumbo butterfly of what this does in SEA. Does it mean Japan, as an ally, is granted free passage across IndoChina to attack Chungking? Without having to annex any part of Vietnam, it would seem the asset freeze & steel & oil embargoes that were proximate causes of the Pacific War disappear...
This IMO is a very bad thing for Germany....


Now, U.S. production can concentrate entirely on supporting Britain, without needing to supply American efforts.
The problems with the Mark 13, 14, & 15 torpedoes are likely not to be discovered for decades.

The trouble with the HOR/MAN submarine engines may take years to uncover, too.
Pretty fair chance the U.S. doesn't develop the Bomb until after 1950. (IMO, Britain wouldn't bother during the war, & couldn't afford to immediately afterward; maybe 1955?) Very good chance China ends up capitalist & (at least marginally) democratic, after cutting a deal with Japan for aid in destroying the ChiComs. Very likely there's no U.S. war in Vietnam, so no *AH-1. (Do we see the Cheyenne, instead? Or stick with the *HU-1?)
Likely Ned Beach doesn't write
Submarine!


Or
Run Silent, Run Deep.


Very likely Pendleton never creates Mack Bolan.


(Which also means no Punisher.

) No Vietnam also means no Magnum as OTL & no "Tour of Duty".

Also no "Rambo" series.

