Abu al-Abbas as-Saffah
Abu al-Abbas as-Saffah ä´bo͞o äl-äbäs´ äs-säfä´ [key], d. 754, 1st Abbasid caliph (749–54). Raised to the caliphate by the armed might of Abu Muslim, he took the reign name as-Saffah [shedder of blood]. Most of the Umayyad family was exterminated, and the reign was one of massacre and force. He was succeeded by his brother al-Mansur.
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