Why is it such a big problem? Why shouldn't the AI support a civil war?
Germany sent 10-16000 men historically, Italy sent 60-70000. I don't see a problem with 2 divisions being sent to the SCW, thats around 20K men.
As for the japanese "volunteers" I also don't see a problem. Why shouldn't the AI try to aquire some land XP in a proxy war? I mean transporting 4 divisions to Spain is not something the navy was incapable to do.
Also selecting "historical" mode only means that the AI will take more or less the historical national focuses. It doesn't mean the game will railroad on the same path every time.
Regarding the German numbers: Germany sent a lot of instructors and service personnel, those figures don't fully reflect the combat capability of the German volunteers.
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