Big World - China is the key
Who would have thought that China, the smallest nation, could be so crucial.
The computer almost always fails in holding it. Meaning Russia collapsing soon thereafter despite my best efforts (playing Human US & UK).
Still managed to win after 30 turns by neutralizing Japan and fighting a massive Germany through a war of attrition across the Eurasia.
It was a slog though. Key is not to liberate China/Moscow if given the chance. Had 8 factories in east asia spawning tanks constantly - some of which would get turned over to China and be useless if liberated.