I think, that I would have scrambled with 3 fighters to SZ110 because of the lack of sub fodder and 1 fighter to SZ109.
In my turn I would have attacked the remaining sub(s) in SZ109 with SZ106 destroyer and air to prevent convoying.
The z102 rule allows USA to sink the German fleet with carrier-based planes post-sealion, even if japan is still Neutral and bombers have nowhere to land (which is unlikely).
How many subs do you recommend attacking SZ106 with? 2 subs or 3 subs? If the answer is 3 subs that leaves only 2 subs to attack SZ109 with, along with one FTR and one S. Bomber. I don’t see any other aircraft that can reach SZ109 on the first turn. Attacking SZ109 w/only 2 subs seems a little light, as the UK can scramble 3 FTR’s to help rescue SZ109. So I’m guessing the best strategy is to attack SZ109 w/3 subs to help absorb casualties, in case the UK player scrambles? And only attack SZ106 w/2 subs? If only Germany had one more sub…
Yes, it can do that. Refer to page 20 of the P40 rulebook, under restrictions on placement:
“New Sea units can enter play even in a hostile sea zone. No combat occurs because the conduct combat phase is over.”