
Abbasid caliph who fought the Byzantines.
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Al-Mahdi oversaw the completion of the Round City of Baghdad, the new Abbasid capital founded by his father al-Mansur. This city became a center of trade, learning, and culture, symbolizing Abbasid power.
Al-Mahdi led military campaigns against the Byzantine Empire, including a major expedition in 775 that reached as far as the outskirts of Constantinople. These campaigns were part of the ongoing Arab-Byzantine wars and resulted in territorial gains for the Abbasids.
Al-Mahdi dispatched forces to suppress a Kharijite rebellion in the Jazira region. The revolt was crushed, and its leaders were executed, reinforcing Abbasid control over the region.
Al-Mahdi supported the translation of Greek, Persian, and Indian scientific and philosophical texts into Arabic. This patronage contributed to the Abbasid Golden Age and the preservation of classical knowledge.
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