I don’t think the play testers thought much about Mongolia. The only time I can think of invading it is in a fight between Japan and the USSR when one of them want to open up the front a little bit for.
id like it if a turn represented 3 months
1 turn to a season
so that seasonal rules would be simple to implement.
I see where you’re coming from, in fact, I had the same idea, try to make it simple. However, I honestly didn’t really think of seasonal board changes, I was only going for chronological comparisons.