Spanish knight who fought the moors in 1094 AD?

Rodrigo Diaz de Vivar, known as El Cid, was a Castilian military leader in medieval Spain. He served under Ferdinand the Great's son, Sancho and rose to become Bearer of the Royal Standard and Commander upon his ascension to the throne. He led successful military campaigns against Sancho's brothers as well as the Muslims in Andalusia. Unfortunately, when Sancho died without issue, his brother was the only heir and due to his previous battles against him, El Cid fell out of favor and lived the rest of his life in exile.