Sancho II of Castile

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Sancho II (1040-1072), called the Strong, or in Spanish, el Fuerte, was King of Castile (1065-1072) and León (1072). He was the eldest son of Ferdinand I of Castile and succeeded in Castile while his younger brother Alfonso succeeded in their mother's inheritance of León and Galicia was given to the youngest son García.

In 1068, Sancho defeated his cousins Sancho IV of Navarre and Sancho of Aragón in the War of the Three Sanchos. He reconquered Bureba, Alta Rioja, and Álava which his father had given to Sancho of Navarre's father, García, in return for aid against Bermudo III of León. In that year, he defeated Alfonso, his brother, at Llantada, but he soon teamed up with him to conquer Galicia. They succeeded (1071) and partitioned it, but Sancho then turned on Alfonso. With the aid of his alférez El Cid, he defeated Alfonso at Golpejera (1072). He then forced him into exile in Toledo and took over Castile as king. His sister Urraca, Lady of Zamora, held that city against him, as the Leonese were strongly opposed to his presence. It was consequently a Zamoran noble who finally put and end to Sancho's campaigning success. Vellido Dolfos entered Sancho's camp as a pretendant deserter, separating Sancho from his guard as if to tell him the secrets of the Zamoran defence, and assassinated him.