So I guess what used to be the western Soviet union is now eastern Europe? And what used to be eastern Europe is now central Europe?
Well, basically Eastern Europe = East Slavs (Belarussians, Russians, Ukrainians). Central Europe = east of the line from the Netherlands through switzerland’s eastern border and Italy’s eastern border excluding the Balkans (separate region) and Scandanavia (separate region) — these are countries from Estonia to Romania that have economic commonalities