Ahmad al-Mansur ä´məd äl-mänso͞or´, Arabic äkhmäd´ [key] [al-Mansur,=the victorious], d. 1603, emir of Morocco (1578–1603). Proclaimed ruler after his brother's death at the battle of Ksar el Kebir , he gained prestige from the victory over Portugal. In addition, the ransom of the Portuguese captives made him wealthy. He was able to give Morocco a quarter-century of relative peace and prosperity. His conquest of Timbuktu (1590–91) marked the peak of Morocco's extension into the territory S of the Sahara. The cost of maintaining an army at so great a distance prevented him from gaining any permanent benefit from the conquest. He engaged in a commercial correspondence with Queen Elizabeth I of England and encouraged foreign trade.
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