I agree this is something I’ve never seen in a RL game. Maybe vs. the comp but even then…
Any invasion of North America proper with the exception of Alaska can be sniffed out pretty quickly. If the Germans are buying transports also that tells me they aren’t buying lots of inf, which means they aren’t worried about the Russians which means Russia is kaput which means the entire Allied game plan is pretty much kaput (economic victory usually follows caputre of Russia).
As was said above this, if you can somehow get things going and time a joint Japanese/ German assault where it would split the American ability to defend, but even then you would have to have a lot of troops since they can pile up 7 INF/ turn with only W and E USA.





