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In page Reconquista:

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Documents dating from the 10th and 11th centuries are mute on any idea of reconquest.[citation needed] The Crusades, which started late in the 11th century, birthed the religious ideology of a reconquest. In al-Andalus, Christian states of that era were confronted by the century-long rule of the Sanhaja-ruled Almoravid dynasty and subsequently the religious extremism of the Almohad Caliphate of the Masmuda, which supported a similarly staunch ideology of jihad.[7]