Edited sentence: A Kurd named Nasr or Narseh converted to Christianity, and changed his name to Theophobos during the reign of Emperor Theophilus and was the emperor's intimate friend and commander for many years.After the defeat of Babak, Narseh and his followers settled in Pontus (north-central Anatolia).Narseh himself fled to the Byzantine territories and helped form the Kurdish contingent of Theophilus.Narseh joined Babak's rebellion in southern Kurdistan, but Abbasid armies defeated his forces in 833 and according to the Muslim historian Tabari around 60,000 of his followers were killed.This Kurdish force invaded the domain of the caliphate in 838 to help Babak's rebellion