After the death of Sultan ‘Ala’ al-Din Kayqubad I, his eldest son Ghiyath al-Din Kaykhusraw ascended the throne against his father's will and his supporters became powerful in Rum Saltanat of Saljuq dynasty. Among them Sa'd al-Din Kopek seized the greatest power and killed the late sultan's Ayyubid wife 'Adiliya, Kamal al-Din Kamyar, parwana and atabeg of Kaykhusraw, putting such persons in prison as the two sons of 'Adiliya, Qaymari the Kurdish chief, and Qayir Khan the leader of Khwarazmian soldiers. These political events mean that the influence of the late sultan Kayqubad was to be removed during the first two years of Kaykhusraw's reign and as a result Kaykhusraw's Saltanat lost its military power.Then in autumn of 1240 the revolt of Baba happened in the basin of Euphrates and soon reached to the central parts of Anatolia. Rum Saltanat's troops were defeated four times and unable to suppress the revolt, while they were successful in capture of its charismatic leader Baba Ishaq Khariji and put him to death in Amasiya. The final battle was fought in the desert of Maliya near Qirshahr and the followers of Baba, most of them Turkman nomads, were annihilated together with thier families and livestock. After the painful victory over the revolt of Baba, Kaykhusraw's Saltanat became more active than before in its military phase against the Khwarazmians and the Ayyubid maliks in Diyar Bakr.From the historical point of view the revolt of Baba was not the prelude to the approaching Mongol invasion, but its disastrous end led to the establishment of Kaykhusraw's power in Rum Saltanat.