I'm pretty sure there'll be no war
Russia is putting troops there only to keep the fear flowing and to send gas prices up
After all, they profit a lot with it. Just observe how things are "calm" in the middle east. Not many bombings, Iran is quiet, Iraq has not much going on. The war in Yemen is being forgotten. Palestine is quiet too, same with Israel
They are doing this to make some money with high crude prices
They want the population gone, but they don't want major wars that cost a lot of money and destroy the environment,
They want people dying of disease, famine and localized civil wars. And more important, they want to make sure that the number of births is shadowed by the number of deaths.
When population numbers start dwindling they'll applaud and say that humanity is on the right path