The Battle of Uclés was fought on 29 May 1108 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. The battle was a disaster for the Christians and many of the high nobility of León, including seven counts, died in the fray or were beheaded afterwards, while the heir-apparent, Sancho Alfónsez, was murdered by villagers while trying to flee. Despite this, the Almoravids could not capitalise on their success in the open field by taking Toledo.

• http://en.wikipedia.org/wiki/Battle of Uclés (1108)