The History of al-?abari Vol. 33: Storm and Stress along the Northern Frontiers of the ?Abbasid Caliphate: The Caliphate of al-Mu?ta?im A.D. 833-842/A.H. 218-227

This section of al-Ṭabarī's History covers the eight-year reign of al-Muʿtaṣim (833-42), immediately following the reign of his elder brother al-Ma'mun, when the Islamic caliphate was once more united after the civil strife and violence of the second decade of the ninth century A.D. Al-Mu'tasim's reign is notable for the transfer of the administrative capital of the caliphate from Baghdad north to the military settlement of Samarra on the Tigris, where it was to remain for some 60 years. Th...