Assuming the Japanese don’t attack J1, One strat I tried was for the US to Move the Fleet to Wake, and I built a naval base there on US 1. If Guam is open on US1, move the fighter and troops there too. Now your forces at Wake are in range to counter attack or reinforce Guam, and the Aussies can fly up all four fighters on ANZAC 2 (actually, 1 can move up on ANZAC 1).
Guam is a key location for the Allies, specifcally the US, to attack Asia & lots of targets from.
Just something to consider. :-)