Ukraine

It is funny how all these news reports forget to mention the single important fact:
http://en.wikipedia.org/wiki/Natural_gas_in_Ukraine#Shale_gas

Ukraine has Europe's third-largest shale gas reserves at 1.2 trillion cubic meters (tcm).[13] There are two potentially large shale gas fields.[13] The Yuzivska gas field located in Donetsk Oblast (province) and Kharkiv Oblast; and the Olesska field in Lviv Oblast and Ivano-Frankivsk Oblast.[13] Ukraine signed a shale gas 50-year production sharing agreement with Royal Dutch Shell on 25 January 2013 involving the Yuzivska gas field.[17][4] The $10 billion deal was the largest foreign direct investment ever for Ukraine.[17]

And these reserves happen to be exactly in the middle of the conflict zone.

So it won't end with Crimea, because the best Russia can do is to deny the West of all natural resources, no matter the sanctions. It is like Starcraft, where best strategy is denying enemy from expansion. What sanctions you may impose, if you have no fuel to run you tanks?

Doesn't even matter. RUSFED has already proven the effectiveness of the zerg rush strategy kekeke gg