What would have happened in this situation in real life?

[floundericiousWA]

Originally Posted by Frank0001

Hitler wouldn't be too pleased, since he specifically ordered NOT to interfere with the Americans or piss them off, to avoid them joining the war (and look how well that ended!)

Originally Posted by GoldenRivet

In real life, the American DD would have probably positioned itself between you and the C2 and called for reinforcement.

Eventually, i would Imagine that your sub would be pursued and possibly boarded / interned in the very least for attacking a ship in Neutral American waters.

There's your answer, I think they've encircled the question, illuminated it, and shot it to death, so to speak!