Greater Yuan Dynasty (Mongolian: Dai Ön Ulus) or Mongol World Empire (Mg: Ikh Mongol Uls) is a sovereign state governed by the Mongol Khan. Largest contiguous state in the world, this modern dynasty of China and Mongolia encompasses the entirety of Asia, with the exceptions of Arabia, India, Korea and Japan. China has such vast territory and uncountable residents that alliances are unnecessary. Even Rome can pose only a minor threat to its security. It has taken periods of great military tension - as those times preceding the Great War - for it to fight alongside another great power.