Don’t think it will work. Your going to have Allied Transports up your ass quickly. The Russian (or British) airforce is going to sink that transport in the Med. The Russians could just be smart and attack Eastern Europe when you get to Caucases. By doing this, you can freely take Moscow, but the Russians are going to take Berlin. After the Russians take Berlin, the British and Americans can reenforce the Russians there or take out W.Europe or (ideally) Eastern Europe.