I believe they would fight. What I doubt is their ability to go as far as a country like, say Russia, would. To remain in a long, bitter slug match. Could be any number of reasons. The Russian government looking to rally their people around a common cause, maybe? Or some crazed nationalist thinking Russia should be at the top of the European power ladder? We are already seeing their leaders calling for Russia to return to its former glory, whatever that means. Are they capable of it now? No. Will they be in the future? Maybe. They are currently revamping their military structure and strategy, at a time when most European militaries are being downsized and allowed to 'decay'.