Just what it says on the tin. The Russian Revolution began in 1905, but wasn't able to apply its ideaology to the entire country until over a decade later...so I was wondering, would it be possible to see a major nation go communist before the turn of the centrury? Probably not the Russian Revolution, since that was fed by some unique circumstances, but elsewhere, like France or Germany...or somewhere else plausible, on a large scale? How could this come about?
tl;dr
Challenge: A major power goes red before the turn of the century.