Quote Originally Posted by Gelatinous Cube

The siezure of a german sub by US forces that was carrying material for a nuclear bomb to japan: Had the sub gone through, there is little doubt that a Nuclear attack could have, and would have, been made on the United States.
Never heard of this event GC - what are the details? Was the material specifications or raw materials?

Overall I'd have to say Battle of Britain - Ending the war in Western Europe means military resources can be concentrated on Russia, and access to supplies e.g. oil is easier. (OK, I'm British and biased!)