Möngke also makes some major administrative changes…

Möngke also makes some major administrative changes in the khanates established by the will of Chinggis.

He disinherits the surviving sons of Ögedei, arranging that he and Kublai will inherit the lands of East Asia.

He also places a limit on the domains of the successors of Chagatai; these are to end along the Oxus River and the Hindu Kush, instead of extending indefinitely to the southwest.

Southwest Asia is to be the inheritance of Möngke's brother, Hulagu, the first of the Ilkhans ("subservient khans") or Mongol rulers of Iran.