Ok We have some more...

Russia
Estonia
Ukraine
Uzbekistan
Georgia
Armenia

from Armin we have ...

Belarus
Kazakhstan
Latvia
Lithuania
Moldova

I'm going to disallow kryzikistan, the spelling is a little too far off, but there is one that sort of sounds like it.

S we 11 out of 15 so far. good job Armin. Keep in mind we are talking USSR, you have a few Iron curtain countries here, but they aren't USSR.