Task: Text Categorization
Input (English): This ruler dispatched the Nestorian monk, Rabban Sauma, as a diplomat to Christian Europe. With the help of his general, Hundred Eyes Bayan, he successfully besieged the cities of Xianyang and Fencheng. After those victories, he conquered the Southern Song and declared himself ruler of the Yuan Dynasty. This man sent an expedition to Kyushu, which was defended by a stone wall along Hakkata Bay; however, that expedition failed when a typhoon called the kamikaze destroyed this ruler's navy. For 10 points, name this Mongol ruler visited by Marco Polo who was the grandson of Genghis.
Output (English): History