Several former references to Dore Temur in the Yuan shi, part of them cited by Bretschneider (Mediaeval Researches, 2: 14) and hence in Barthold and elsewhere, confused the Chaghadaid prince with Dore Temur son of Yaqudu, a Toluid
prince who was subject to the Yuan.
A contemporary of emperor Qubilai, the second all-Mongolian ruler after the Toluid
take-over in the Golden Clan who had moved his capital from Qaraqorum to the southeast, that is, shifted the center to the Chinese part of the Mongol Empire, Qaidu was keen to exploit the resulting vacuum of power.
The initial chapter provides a brief historical overview of Genghis Khan and Mongol rule, focusing on the Empire (1206-1227), the rise of the Toluids
, Mongke Khan (1251-1258), and the Golden Age.