Rivalries with one of his
Rivalries with one of his brothers forced this ruler to dismiss his adviser Mahumud Yalavach and replace him with Mahmud's son, Masud Beg.  This man's sister-in-law Sorqoqtani Beki held that her husband drank a cursed drink, which killed her husband but saved this man from illness.  His general, Dayir, was killed while storming Lahore, and his wife Toregene ruled as regent for five years after this man was killed in a drinking bout with Abd-ur-Rahman.  This man inherited a minister from his father named Yulu Chucai who convinced him not to slaughter the residents of Northern China.  This ruler ordered the construction of walls and a palace at Karakorum after his generals destroyed the Jin Dynasty. He was succeeded by his son, Guyuk, who died on his way to confront the head of the Kipchak Khanate, Batu. FTP, name this third son of Genghis Khan and his successor as Great Khan.
Rivalries with one of his brothers forced this ruler to dismiss his adviser Mahumud Yalavach and replace him with Mahmud's son, Masud Beg.  
Ogedei Khan [or Ogotai Khan]