This is a list of various tactics that work for the allies in dealing with a J1 war dec. Most of these will deal with the two leading japan tactics with a J1 war dec, which are to attack phi, one DEI, and then either contain India with a major IC, or to crush India with overwhelming air power on J3. I will list some corner cases later on. A typical J purchase is J1: 3 trans, J2: Major IC or Airbase/Navalbase. This is not to say the game is balanced without a doubt, I just know in the distant past many of these were discussed and people new to the board may not have seen them. If you have something to add let me know and I will update the original post if everyone desires.
There are two main methods with the US, the ‘chain’ method, and the ‘northern method.
Northern: This works well against an India crush. The idea is to bring as much firepower to the home island as fast as possible. Your long term goals are to convoy raid the sea line and/or to get a factory on Korea and/or liberate some china coast. This will give you economic parity. On US1 purchase a carrier, you can bring 1 fig, 1 tac, and 1 bomber to SZ6 using your carrier, if you can sink the J1 purchase, do so. Move your destroyer and some planes to kill the sub at pearl if you desire. You will want to park the rest of your fleet in SZ 7 or SZ 15, and park your planes at Pearl. On US2 you can hit SZ6 with 1 SS, 1 DD(if survived), 1 Cru, 1 BB, 1 AC, 3 figs, 3 tacs, and 2 bmrs. On US2 you may want to take Iwo if you can safely, and continue a build up in SZ 7. You will want to purchase mainly destroyers at this point with a few transports and subs. If at anytime you can take Korea, or your fleet can move into SZ6 without it being destroyed, you should do so. SZ6 is an 11 IPC convoy! Japan will be hard pressed to keep you out while still committing to an India crush tactic, and typically will even be stuck to building fighters to secure the SZ instead of surface ships.
Chain: This is more of a simple strat, you simple send your fleets from LA, to Pearl, then to Australia. You then simply trade DEI islands, take Truk, or go liberate Phi. At no time do you send your entire fleet out unless it will survive a counter attack. You slowly build up and push until you can take and hold a DEI island or something similar. This method is far to slow with early pressure against Japan to work against an India crush.
China: This is a very simple country, and has one main goal. To annoy japan as much as possible. You have two main things you can do with this country, the slow northern push to meet up with the US, or stay south and keep the burma road open as long as possible. The two big things to remember, against an India crush you must retake Yunnan, or atleast kill as many Japan units there as you can on turns 1 and 2, and that your plane can land in burma if that would be safe. For the most part though, China has to follow the UK or US lead. And remember, the US can liberate one of your territories and you can then drop units purchased into it that turn.
UK: You have 3 main tactics you can do. Delay an India crush, kill as many planes as possible in an India crush, or hold Burma road. For an India crush to work on J3 japan must take and hold one of 3 territories: Sham State, Yunnan, or Ceylon. On UK1 to delay the India crush purchase 1 tank, 1 mech, and 2 inf. Then move all India units (including AA) to Burma. If Yunnan is held by Japan at this time, liberate it with planes and 1 inf from burma. Also, move your DD/Cru to SZs 37 and 41 to protect Ceylon. On UK2 simply counterattack either Yunnan or Sham State with units in Burma plus air and your tank/mech. It is possible for japan to kill all your ground units in Burma with air on J2, but then they have to fly against the AA gun twice, very painful, and you may still have odds in liberating as they cannot land ground units there to stop your armor/mech and planes. The other tactic, holding Burma road is simple. Purchase 4 mech inf on UK1, move all units into Burma and Sham State. On UK2 simply stack the daylights out of Yunnan. You should have almost 20! allied units there. And remember, china can move into burma if japan tries to build an IC in Malaya to help the UK hold there in later turns. To make the India crush as painful as possible is extremely simple, build all INF.
ANZAC: This is a fun, odd, little country. Your main goal is to stay alive, and annoy Japan. Ensure you have enough ground units that Japan cannot overwhelm you with a drop. You can use mech/arm for this or simply stack up in South Australia. After that simply build subs and transports to convoy raid and/or snipe. Do NOT send off all your planes or you will be too weak to hold off Japan!
Odd J1 attacks: (will post later)
J2 India Crush: