The revolt began ca. 1240 in the remote borderland of Kafarsud in the eastern Taurus Mountains and quickly spread north to the region of Amasya. Seljuq armies at Malatya and Amasya were destroyed. Soon the very heart of Seljuq Anatolia, the regions around Kayseri, Sivas, and Tokat, were under the control of Baba Ishak’s supporters. Baba Ishak himself was killed, but the Turkmen continued their rebellion against the central Seljuq authority. The rebels were finally cornered and defeated near Kırşehir, probably in 1242 or early 1243. Simon of Saint-Quentin credits the victory to a large number of Frankish mercenaries employed by the sultan.