The International Business Times has an overblown story on a "close ex-adviser" to Vladimir Putin who says the Russian president "ultimately wants to reclaim Finland for Russia" (although the adviser concedes that "Finland is not Putin's primary concern at present," which is what inflates the story to mere sensationalism).
Even if true, Putin might want to rethink this amorphous strategic objective in light of Joe Stalin's bracing introduction to Finnish resolve. Man for man, ain't nobody tougher than Finns; they're the globe's badass honey badgers of guerrilla warfare and dug-in resistance. In one Soviet offensive during the Russo-Finnish War of 1939-1940, 4,000 Russkies went up against 32 Finns. Four Finns survived, after killing 400 Russians.
Of course Russian efficiency was also on display. In one of that winter's campaigns, a wholly ski-less Red Army division received instruction manuals on ... ski tactics.
Before it was all over, the Soviets had lost upward of a quarter-million men; the Finns, less than 50,000. Stalin settled for only 10 percent of Finnish territory.