The present volume of the History of al-Ṭabarī deals with the years 14 and 15 of the Islamic era, which correspond to A.D. 635-637. The nascent Islamic state had just emerged victorious from the crisis that followed the Prophet's death in 632 and had suppressed what was known as the riddah ("apostasy") rebellion in the Arabian peninsula. Under the leadership of ʿUmar ibn al-Khaṭṭāb, the second caliph, or successor...