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.
Question about placing units in hostile sea zone
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As far as I understand, it is possible to mobilize new units even in hostile sea zones, but what then happens on my opponents turn? Are his units stuck and forced to conduct combat, or are they free to move out of the hostile sea zone?
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They can use their combat move to leave that sea zone. It is one of the few instances where a combat move doesn’t have to result in combat.
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Thanks. But do you have a reference from the rulebook (to settle the discussion we had)? We just couldn’t find it. It would also be interesting to hear of other combat moves that doesn’t result in combat (other than attacking empty hostile territories).
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Rulebook Europe 1940 second edition page 14 left column top of page will give you the information that you seek.





