Russia has considered states on its periphery as part of its sphere of influence. Frequently, however, those neighbors have had ideas of their own and their domestic politics have been defined by the struggle between pro- and anti-Russian factions.

This fight was played out most recently in Ukraine, where the election of Viktor Yanukovych earlier this year signaled the resurgence of pro-Moscow forces in the country. Last week, the two countries signed a gas-for-bases deal that consolidates Russia's presence and influence.

While Yanukovych is no less nationalist than his rivals, his sympathies lie more with Moscow than did those of his predecessor, Viktor Yushchenko. Indeed, Yushchenko's pro-Western inclinations created considerable tension with Moscow. He sought Ukraine's membership in NATO and the European Union, halted the formation of a consortium with Russia that would have modernized Ukraine's gas pipeline network, and had pledged to to expel the Russian fleet from its Black Sea base in Sevastopol in 2017, when its current lease expires.