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).
Tragically, there are not enough japanese roundels to do this (later in the game).
What’s even more tragic (or fortunate depending on how you look at it) is that I have 10 differe A&A’s so a lack of control markers for the big 5 is never an issue. A lack of ANZAC markers on the other hand…