I just played this mod as czarist russia (1919), and won the civil war. I first managed to get a couple of provinces in a peace deal from the soviets, then 5 years later I attacked with tanks and made them my satelite (thereby gaining all my cores on them except their capital).
A couple of weird things happened though:
- Germany didn't lose any of its posessions, in fact, france declared war on them but after some fighting accepted wp.
- Austria attacked hungary and annexed all of its provinces except the capital.
- Really weird thing: the armies of estonia are invincible! Seriously, look at the screenshot, those guys havent lost a single man so far. Of the 16 of my divisions, 5 are tank divisions. Note that I gained 3 provinces of them in an earlier war, without having to fight (only occupy).