I'm trying to make a group of nations go Communist (in my TL), but this is pretty hard. China's already Socialist-Communist, so it doesn't count. The Russian Empire still stands, too.
Which other colonies or nations could go communist? I was thinking that maybe communists could rise up in Bengal, maybe.
Persia? Or is that too early?
Any other suggestions/ideas? Maybe Japan?
Also, POD preferably after WWI, but before WWII.