I kinna agree with both Noll and Jennifer… even if it seems opposite. I mostly played (any version) A&A 1vs1. In such game, the global victory comes way before every nation’s objectives.
For instance, from Japan’s point of view it’s quite pointless to invade nothern poor land and would required a loot of land troops to keep control (occupation is free in A&A) while a non agression pact fits Japan just as Russia. From A&A “Axis” point of view, specially as 1 player acting whole side, there’s no doubts, no mistruss so all units from different nations fight towards same objectives… and Japan’s pressure on Russia serves (and needed by) Germany.
So, I agree that Japan attacking is always a good strategy for Axis and it’s ahistorical… but still, doesn’t remove anything from Noll’s “what would have happened if Japan/Germany/Italy did this instead of that” which I totally agree with.
That being said, I rarely (if not never) saw Alliance win with a Kill Japan first strategy. If it happens is not because Alliance succeed to beat Japan, it’s because Germany failed to win… which would be very surprising if USA is not involve in Europe.