The Germans have no destroyer present, therefore the defending air units can not hit the sub, and of course the sub can never hit planes. Think of it in terms of the combined arms rule, air units can only hit subs if they are combined with at least 1 participating destroyer, the difference with this particular combined arms is that it works while attacking and defending. In the scenario that you described, the sub would destroy the remaining transport without rolling and the defending fighters can do nothing.
Rules question
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Usa attacks Japan with a CV, fighter and tactical bomber.
Japan has a sub, destroyer and 3 transports.First round- Japan loses only the destroyer and USA loses nothing.
What happens at this point?
CV and planes cannot hit the sub.
What can the sub do? -
If the US continues the attack, to get the three transports, then the sub will get to take a shot at the cv.
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Ok now something else similar has come up. I have 2 loaded cv and 4 loaded transports ready to attack Japan. Japan has 2 subs sitting there. How does this playout?
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I’m thinking attacking transports accompanied by surface warships can ignore defending submarines.
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You can ignore the subs, but if Japan scrambles a fighter the subs can fight in the sea battle.





