@ViribusUnitis:
Nevertheless I don’t understand the Mongolia rule. As I understand it the Russians can attack Japan R4 any time and still Japan cannot attack Amur from Korea\Manchuria?
Yes. Barring an oral “gentleman’s agreement” (that is made to be broken), Russia can attack Japan at any time, including R1. Japan can attack Amur from Korea/Manchuria, but then Mongolia all becomes Russian.
But when Russia pulls back
I’m not so sure Russia will want to pull back, to prevent blow by over the North by Japan.
Japan could land with a Transport there and NCM everything up?
Yes. And this is another reason Russia might not pull back from Amur.
Or they could attack from Siberia without provoking the Mogols?
Yes.
And what about the Planes? Are only the ones in Man\Kor not allowed to attack?
That’s a good question. I would predict that it’s only the ground forces, so if you amphibious assault Amur, planes from Man/Kor could join. After all, you could fly them out to sea and back… I dunno, that’s a good question.
But yeah, as Russia I leave forces in Amur so that Japan can’t take over all of Eastern Russia without incurring the wrath of the Mongolians, and so that Japan can’t waltz past Amur to the north.