~Crimea, for starters. Then Ossetia, Abkhazia, off the top of my head. Dude, you need to step up, or call your supervisor.~
None of the above are nations to start with. Not to mention Ossetia and Abkhazia are as European as Colombia is North American.
A sovereign nation on the border of Russia is not really a sovereign nation . . . but a part of the "near abroad." But don't dare mention that term. "Monroe Doctrine."