This strategy won’t work. First of all, the US is strong enough to defend against Germany and Japan attacking it at once. If it needs to, it can build up a major defensive land force, capable of defeating anything the Germans or Japanese try to attack it with. The reason being is, as some folks have pointed out, while Germany and Japan are attacking the US, who is defending the German and Japanese IPC hexes from the Russians, Anzac, China and UK India? It won’t be long before your IPC base is toast and you start losing major territories. IF you’re able to beat the US, then the Allied player(s) are very weak! I just don’t see any scenario, even after a successful Sea Lion where the US falls, w/out the Germans & Japanese being steamrolled by the other Allied countries. The Axis would have to protect their IPC territories AND conquer the USA. I just don’t see this as being possible. Keep in mind, it’s easy to block SZ’s w/1 DD, making it difficult for the opposing player to make any headway.
I believe, after a successful Sea Lion that the path to easiest resistance is attacking Russia, especially if the Japanese are also focused on this effort. You use a two prong attack, w/the help of the Japanese through China and Soviet Far East. And the Italians down south.
Also, as some folks have pointed out on this thread, if you see on G2, Germany builds a bunch of transports, then Russia should IMMEDIATELY switch to offense and switch their builds from mostly infantry to mostly artillery and tanks. In the beginning, it is good for Russia to build mostly infantry but not ALL infantry. I believe this is a mistake. With 37 IPC’s a turn, I think it’s best to build about 9 Inf a turn. Then build Art, Mech & Tanks. By the time Germany attacks Russia, usually Turn 3 or Turn 4, Russia will have a nice sized attacking force. But, if the Russians are still building infantry, after the Germans have tipped their hand that they’re doing SeaLion, then you’ve made a HUGE mistake as Russia.