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Born on April 26, 764 CE, Al-Hadi was the third Abbasid caliph, ruling from 785 until his death in 786. He succeeded his father, Al-Mahdi, and was known for his military campaigns against the Byzantines and his efforts to consolidate Abbasid power. Although his reign was relatively brief, Al-Hadi's rule had significant implications for the Abbasid dynasty and the broader Islamic world.