If you build an AC or 2 transports on G1, the allies can both buy air and sink you unified navy in sz7 on UK2 and US2. If you really want to mess with the Allies in the Atlantic, you might want to try one of the following strategies (though they do come at a cost):
bid a sub in sz8 and kill the sz2 navy on G1 (you can combine this with a naval purchase on G1 and foregoing Egypt, sending the sz 14 fleet to sz 13, if you have the nerve) Buy something like bomber, fig, 5 inf or bomber, 8 inf and move your navy to sz 7 (add the sub in sz 8 or a possible bid unit for added effect). Because of the extra bomber, the UK will be hard-pressed to unify in sz 8 and hitting 5+ units in sz 7 is not really attractive either.German Offensive Troubles..
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Jap player could sometimes not do pearl, in tempting US to come to pacific.
All Jap units could be used on mainland J1.
If UK goes all in, those units should be killed, though.
Problem with not doing pearl, is that US may send the pac fleet against Japan, and still build everyhing in EUS.
Pressure on Germany would be the same, the US pac fleet uses 3-4 rnds before it’s in European waters.
If US catches the bait, pressure on Germany will be much weaker.