An interesting strategy, I once playtested it against Hard AI on triple a. In my opinion there are two scenarios in which you can capture the USA:
1.) Capture the Western USA “by chance” - The US player simply did not notice that a japanese transport could reach the american mainland.
This happend to me once, I have to admit 8-) This is very unfortunate, but the US player will be able to recapture it in 2 turns. The greater problem is that you cannot really build a strategy on it. therefore no. 2:
2.) Capture the US by establishing a convoy over Alaska.
This is a strategy I once tested, and there are even some pros:
- Alaska is worth 2 IPCs
- Alaska cannot be reached within 1 round from the Western USA
- Alaska is only one move away from the japanese-adjacent seaszones
- You can build a factory in Alaska which can produce 2 units a turn
This may sound quite good at first, but you have to be aware that the US player can still produce damn many units to protect his land since he will probably still have 38 IPCs/turn. Going US first means you won’t invest too much on the asian battlefield and thereby will not have 50+ IPCs to compete with that.
This strategy should work if the US player goes KGF. Even if you cannot establish a bridge head in Alaska, he has to spend some IPCs to get rid of those japanese units on his territory.
Try the strategy for yourself, but for me it only worked when it was clear that I had won nevertheless and therefore could spend a lot of IPCs to establish a bridge head in Alaska. But of course I am not a big fan of this strategy since I am a passionate Allied Player who usually goes KJF ;).
I hoped it will give you some ideas, am am always open for counter suggestions :)