Tahir ibn Husayn (Persian: طاهر بن حسین Arabic: طاهر بن الحسين) also known as Dhu’l-Yaminayn (the ambidextrous) and al-A’war (the one-eyed) was a Iranian general and governor during the Abbasid caliphate. Specifically he served under al-Ma’mun during the Fourth Fitna and led the armies that would defeat al-Amin making al-Ma’mun the caliph. He was then rewarded as governor of Khorasan which marked the beginning of the Tahirid dynasty.
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