I think dominating a country militarily and installing puppet governments and banning their religion and forcing their children to learn your native language is

I think dominating a country militarily and installing puppet governments and banning their religion and forcing their children to learn your native language is bad enough. If nothing else, the Eastern Bloc was being exploited for the purpose of providing a land buffer zone against military invasion. I.e., the risk of being a front line battlefield was being exported. If you're looking for a shipping manifest for raw materials from an EB country to the USSR at prices below free market rates I imagine you could find that too. But to me that's not the primary point.