MOVED: Seperation for Naval and Land Air forces.

It depends on what side you are playing.  If your son is going to be Japan, tell him to follow the previous advice.  If you are playing Japan, follow the USA-killing strategy in the Pointlessly Broken thread and effectively win the game in turn 5.  Sadly something like 75% of the content in that thread is a needless flame war (as these boards are un-moderated for all practical purposes) but there is plenty of insightful commentary in there if you can suffer through it.

EDIT: I should point out that the war plans in that thread don’t translate that well into the Global game.  If the USA can afford to ignore Europe for the first several turns of the game, then it has enough to place into the Pacific that Japan won’t take it down.  Japan also has the issue of a possibility of expanding too quickly- since there are so many places it needs to reach, its forces will start to thin out all along the front.  At that point the Allies can start to pick off Japanese forces piecemeal and slowly turn them around.  I liken it to blowing up a balloon- if it gets too big, you can pop it.  The Japanese are protected from this effect on the Pacific stand-alone map since they will run into the edges of the map which provides cover for their flanks.

thanks BadSpeller!

Well, Kat, here is the dilemma:

If you allow Japan to take Hawaii, the following turn Japan swings down to Australia.
Add up the victory cities: 2 starting cities, Phillipines, Hong Kong + Hawaii = 5 total.
Sydney is 6. No need to slog through to India.

If you surrender Hawaii on J2, Japan could conceivably win the game outright on J4.
J3 fresh troops from Japan land on Hawaii. New Zealand falls. Don’t forget Australia does not get to scramble fighters because they are considered a continent, not an island.
Third CV returns to Phillipines to help with ANZAC attack.
J4 fresh troops arrive in Hawaii; existing troops shuttled to Queensland or New Zealand, depending where ANZAC defends.
At best Sydney holds out until J5.
As Japan I could send out DD screens to delay US counterattack.
Also, if Hawaii falls on J2, virtually every fighter in Asia I have will be in Hawaii by J4.
The scrambling rules allow ALL fighters to defend sea zone around Hawaii.

In case of an allies capital being captured: (Correct me if I’m wrong)
Say The Gilbert Isles are in Jap hands, along with India (UK capital). If the US liberates Gilbert, then on the US next turn (If India has not been liberated) the US can place an AB/NB there. Gilbert would (temporarily) belong to the US. If India (UK capital) is liberated, Gilbert and its new base would go back to UK. It would be the same for tt that are eligible for IC’s (say Kwangtung).

kcdzim is correct.  Making a combat move against a power immediately makes all sea zones containing its surface warships hostile.