marital alliances among the Iberian Christian states, invited the intervention of his cousin Abd-ar-Rahman III of Córdoba to achieve emancipation from his mother. Thereupon followed three generations of defeat and subjugation by the Caliphate. For his younger son, García created a short-lived sub-kingdom centered at Viguera, which lasted for several decades until its reabsorption into the Kingdom of Pamplona. The latter only emancipated itself from Cordoban suzerainty during the reign of Sancho the Great, who ruled from 1000 to 1035 in Pamplona, but also ruled Aragon, Castile, Ribagorza and eventually León (but not Galicia) by right of conquest. He received the homage of the Count of Barcelona and possibly of the Duke of Gascony. After his coronation in León, he even took up the imperial title over all Spain. His vast domains were divided amongst his sons at his death, giving rise to three independent medieval kingdoms each ruled by a Jiménez monarch. The Kingdom of Navarre, passing to the eldest son García, was unable to maintain its hegemony, leading to the full independence of Aragon under his illegitimate brother Ramiro I, who had previously taken over the territories of murdered brother Gonzalo of Sobrarbe and Ribagorza. Younger sibling Ferdinand I, then Count of Castile, killed in battle his nominal overlord the King of León and Galicia in 1037 and thereby inheriting them and bringing them fully into the orbit of his ruling clan. He then defeated García, achieving a sort of hegemony over his brothers, but again divided his realm among his sons. One of these, Alfonso VI, not only succeeded to the reunited realm of his father, but also conquered Toledo, reclaimed the imperial title and even pretended to rule over both Christian and Muslim Spain. The Navarre branch of the dynasty went into eclipse when in 1076 Sancho IV was assassinated by his siblings, and his cousins Alfonso VI of Castile and Sancho Ramírez of Aragon converged and divided the kingdom, with the Aragon ruler gaining the Navarre crown, while ceding western lands to Castile. The holdings of the family were briefly reunited when Alfonso the Battler of Navarre and Aragon married Alfonso VI's daughter Urraca, Queen of Castile and León, and claimed the imperial title. However, the marriage failed and the kingdoms of Castile and León passed out of the dynasty, to Urraca's son by a prior marriage. The Kingdom of Aragon and that of Navarre