The Battle of Uclés was fought on 29 May 1108 during the Reconquista period near Uclés just south of the river Tagus between the Christian forces of Castile and León under Alfonso VI and the forces of the Muslim Almoravids under Tamim ibn-Yusuf.
In 1108 Tamim Al Yusuf defeated the Kingdom of Castile at the Battle of Uclés. Yusuf did not reconquer much territory from the Christian kingdoms, except that of Valencia; but he did hinder the progress of the Christian Reconquista by uniting al-Andalus. In 1134 at the Battle of Fraga the Almoravids dynasty was victorious and even succeeded in slaying Alfonso I of Aragon in 1139.

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