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The First Crusade did not make a large impression on the Muslim World at the time, contrary to modern popular narrative in Middle Eastern political discourse. In fact, it was not until Turkish general Zengi and his most illustrious successors, Nur-ad-Din and Saladin, took up the banner of religious war as a way of legitimizing seizing control of rival Arab states from the mid-12th century onward.
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Charles River Editors (The Siege of Jerusalem in 1099: The History and Legacy of the Climactic Battle of the First Crusade)