Are there any countries of the world that don't exist any longer? Look at history. Search on "Tartary." This is a nation that existed to some extent as recent as the early 1900s. It was bigger than most nations, and covered most of Siberia and Northern Europe into Northern Canada. Why are they gone (they aren't really gone)? Because they didn't have enough population for the land they were trying to hold.
Where did you get Tartary is a country? Is is an obselete term for a wide region spawing Manchuria, the Gobe Desert and the Tibetan Highlands. It has always been inhabited by a variety of people. From what I get, Tartary is in a certain way associated with the Mongols, Manchurians and other Khanates, Khaganates and all that jazz, so it makes absolutely no sense whatsoever to say "they're gone". That's like saying the Indian subcontinent is gone.
