Since we already have a lively discussion going from the Japanese side of the fence, I thought it would be interesting to start a discussion on US/Allied tactics - either on the offensive side or defensive.....considering the kinds of tactics we are likely to see from our wiley opponents, here's a start:
1) Save as much as you can, as early as you can - but bleed the oncoming Japanese hordes where practical & hold on to resource areas to maximize damage when they fall.
2) Concentrate your strength on the perimeter - set a maximum limit/line of expansion, and prepare the make the Japanese player fight hard for anything beyond that line....again, bleed them as much as possible.
3) Once a balance has been reached, either by mutual exhaustion or the Japanese player achieving their initial goals - prepare to find an area to fight a battle of attrition....like the Solomons, New Guinea, etc. Use your superior resources to drag the Japanese into a long, drawn-out campaign.....you will get replacements much faster than he will, and it might force him to abandon strategic areas, rather than see valuable pilots & ships go up in flames.
4) Do not overextend yourself too early....a Midway-type victory is not necessary, and a good human opponent will probably not give you the chance. As the allies, you have plenty of carriers coming down the pike, and plenty of escorts to go with them. Use your land-based air to create carrier-free zones - a good Japanese player with loathe to put his valuable carriers in range of rested medium bomber squadrons - a couple of decent hits will put a carrier out of the war for months.
5) No breathing room - do not give the Japanese player time to consolidate....always be doing something - picking off an isolated garrison, LR-CAP against an airbase, use your subs aggressively against supply lines.....every AK, AP, or Tanker sunk hurts Japanese supply and their economy. If the Japanese player extends themselves towards Fiji & north to Alaska, use those areas for training - they are difficult to supply & support, and provide you (the US player) with the opportunity to conduct some limited offensive operations to gain experience - you are closer to your own supply sources than the Japanese player - take advantage of it.
6) Full Offensive - if you have properly attrited the Japanese Air & Naval forces and are ready to go full speed ahead on the offensive (late 43 or early 44) - take stock of your position & when the enemy is concentrated. If he has fortified the Central Pacific, consider using Australia & New Guinea as a jumping off point - use diversions, but at the main point of attack, concentrate your power - both naval & land. You can throw plenty more at the Japanese then they can return, be prepared to accept losses in the initial battles, but if you can draw him into a conclusive battle, be prepared to stand and fight - if you've concentrated your forces, you will win.
7) China & Burma - well, this will mostly be a defensive fight but don't feel the need to sit still. The Japanese player has a lot of troops on the ground here & if he is forced to keep them there, they won't be sitting on those atolls in the Central Pacific waiting for your marines to land. Be prepared to give ground - maintain your supply lines, and look for opportunities to strike at his....If you can stop the Japanese short of the Indian border in Burma, make him bleed to stay there. If the Japanese carriers are facing off against the Americans in SWPAC or SOPAC, or CENPAC - use your British ships aggressively to support your ground forces - if they head your way, preserve your forces & rely on airpower to grind them down.
That's what I've been able to gleam so far - from desciptions from testers, AARs, historical references, etc. Let me know what you think & how you might pursue your own campaign.