Ismāʿīl I, (born July 17, 1487, Ardabīl, Azer.—died May 23, 1524, Ardabīl, Ṣafavid Iran), Shah of Iran (1501–24) and founder of the Ṣafavid dynasty. Born into a Shīʿite family with close ties to the Sunnite Sufi tradition, he became head of a Shīʿite military force, the Kizilbash, at age 14. He captured Tabrīz in 1501 and proclaimed himself shah of Iran, bringing the whole country and portions of modern-day Iraq under his control. In 1510 his troops defeated the Sunnite Uzbeks. His proclamation of Shīʿism as the official creed prompted the staunchly Sunnite sultan of the Ottoman Empire to order an invasion of Iran in 1514. Ismāʿīl lost the Battle of Chaldiran, but mutiny among the Ottoman troops forced their withdrawal. The conflict between the Ṣafavids and their Sunnite neighbours continued for over a century.
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