This goes on the assumption Japan did NOT stage its fleet in Carolines or Japan and instead moved the majority to SZ36 in preparation for India Crush on J3/J4.
US1
Purchase:
Buy 1 NB (15) - Place Midway
Buy 1 AC (16) - Place SZ10
Buy 2 Trn (14) - Place SZ10
Buy 1 Trn (7) - Place SZ101 or Save the 7 for US2 assuming Japan is bringing the US into war.
52 IPC Spent
NCM:
Move Fleet from SZ10 to Midway (Bring 1 Inf, 1 Art from W.USA)
Move Fleet from SZ26 to Midway (Bring 2 Inf from Honolulu)
Move 1 Inf, 1 Tnk from Central to Western US
Fly 2 Ftrs from Honolulu to Midway
Fly 1 Ftr from Western USA to Midway
Fly 1 StratB from Central US to Midway
Fly 1 Ftr from Philippines to Guam
Collect 52 IPC
Explanation:
NB Explanation: The NB plays many factors for the US. First, it allows you to stage your fleet away from Honolulu and still play blocker against Japan trying to take it in a single turn (Caroline Islands have no Trn). Effectively as long as you have a fleet staged there, Japan will have to either take it out to get to Honolulu or make a two-turn move (via Caroline Islands) to get there uncontested. The best part is clearly that you can still send your ships from SZ10 there on a single move basically relocating the potential Hawaii battle away from Hawaii.
Further, if J2 puts the US into war, the US can reach Japan from multiple routes, eliminating the single destroyer block move in SZ16 or the surrounding move by Japanese Destroyers in SZs 25, 31 and/or 30. Best of all, the US can now send sorties into SZ6 against any ships Japan decides to put there. The US can send up to 4 Ftr and 1 SB on US3. This forces Japan to either keep 3 fighters on Japan, send ships home to protect SZ6 unit placements, or purchase ships to protect whatever transports it decides to purchase J2.
The Ftr on Guam is more of a distraction than anything else. It allows you to send a 5th Ftr against SZ units in SZ6 if Japan puts you at war on US2, it can hit any unprotected Trn along the Chinese coast, it can serve as a distraction for Japan where it has to deal with a potential 3 Ftrs on it with a StratB as early as US3. Further, if Japan does go after Manila on J2, it still allows the Ftr to survive unless Japan re-directs a Trn that was headed for India Crush to deal with the Ftr. It can also land in Hong Kong on US2 if Japan decided to not take it and provide another distraction of Trn/Flying units that were headed to deal with the Burma Road or India Crush.
The 4 units on Trn that will land in Midway provide for a few options: Iwo Jima on US2 (if at war), a Threat (although not very credible yet) on Japan, or a potential to land on Korea, Amur, Caroline Islands or Siberia.
Basically if Japan sends its fleet South to SZ36 on J1, and the US stages in Midway, it forces Japan to turn around and its still a 2 turn move to get to Japan (earliest return to SZ6 for Japan then is J3 unless Japan bought a NB on J1 and placed it at Hainan). If it doesn’t, Japan is facing a fleet sitting off its coast convoy raiding SZ6 every turn. Even better, if Japan does turn around and the US decides NOT to fight the Japanese fleet, it is a single move from W.USA or Hawaii and can leave a blocker at Midway basically allowing the US to further strengthen its Pacific fleet.
This, all, from a US1 purchase.
US2 becomes very hard to project, because you don’t know how Japan is going to react to sorties being able to fly into SZ6. If its fleet withdraws from SZ36 to SZ19, the US has done its job in the Pacific and can play cat and mouse with Japan in the Pacific the rest of the game. This allows the US to send the next few turns of purchases straight to the Atlantic or continue its push on Japan depending on how Japan reacts as the J1 purchase is generally what 3 Trn and an Art. J2 it has 40 something IPC to spend so it can buy 10 Inf for Tokyo, or a few more ships to augment its returning fleet, or if its fighters are out of position (say oh I dunno, Kwangsi for example) 3 fighters to scramble over Japan. Any of those options buys UK-India time to take the DEI, mass up on Calcutta, or retake the Burma Road while asserting Pacific dominance over Japan (the easier of the Axis targets for the Allies to beat).
Personally I would ignore Europe and keep going after Japan. A Minor in Alaska with a NB on US2 puts 3 more ships a turn headed straight for SZ6. Can we say US4 sending 3 more BB to go along with its fleet at Midway or Hawaii? Thats a pretty big dose of wake-up call for shutting Japan down in a hurry from its India Crush which is all anyone is preaching these days.