No, it wouldn’t.
That sure makes no sense to me, Kev. :?
Page 10 in the book states that Germany and Italy is allied, and they have to be in order to share a territory. So how can a neutral be at war with one power but not his allied friend ? It sure dont work that way in the Pacific, if Japan attack neutral DEI, then Japan is suddenly at war with everybody, even neutral USA. And if it was the other way around, that Russia attacked Italy, then I am pretty sure that Russia would automatically be at war with Germany also.
Come to think about it, when Japan attacked Pearl Harbour dec 7 -41, then Germany and Italy also declared war on USA instantly. If Italy by some odd reason had attacked Russia in 1940, and even through German territories, and even with German soldiers moving in to support the Italian agressors, then I can hardly imagine that Germany would not automatically be at war with Russia.
If Italy attack neutral Spain, then neutral Sweden, Turkey and Afghanistan is at war with both Germany and Italy.
But if Italy attack Russia, then only Italy is at war, not Germany.
If Italy attack USA, is only Italy at war with USA then ? Germany is not ?