Sancho was killed in the siege of Zamora by the traitor Bellido Dolfos (also known as Vellido Adolfo) in 1072. His brother Alfonso VI took over Leon, Castile and Galicia. Alfonso VI the Brave gave more power to the fueros and repopulated Segovia, Ávila and Salamanca. Once he had secured the Borders, King Alfonso conquered the powerful Taifa kingdom of Toledo in 1085. Toledo, which was the former capital of the Visigoths, was a very important landmark, and the conquest made Alfonso renowned throughout the Christian world. However, this "conquest" was conducted rather gradually, and mostly peacefully, during the course of several decades. It was not until after sporadic and consistent population resettlements had taken place that Toledo was decisively conquered. Alfonso VI was first and foremost a tactful monarch who chose to understand the kings of taifa and employed unprecedented diplomatic measures to attain political feats before considering the use of force. He adopted the title Imperator totius Hispaniae ("Emperor of all Hispania", referring to all the Christian kingdoms of the Iberian Peninsula, and not just the modern country of Spain). Alfonso's more aggressive policy towards the taifas worried the rulers of those kingdoms, who called on the African Almoravids for help. Kingdom of Navarre (824–1620) The Kingdom of Pamplona primarily extended along either side of the Pyrenees on the Atlantic Ocean. The kingdom was formed when local leader Íñigo Arista led a revolt against the regional Frankish authority and was elected or declared King in Pamplona (traditionally in 824), establishing a kingdom inextricably linked at this stage to their kinsmen, the muwallad Banu Qasi of Tudela. Although relatively weak until the early 11th century, Pamplona took a more active role after the accession of Sancho the Great (1004–1035). The kingdom expanded greatly under his reign, as it absorbed Castile, Leon, and what was to be Aragon, in addition to other small counties that would unite and become the Principality of Catalonia. This expansion also led to the independence of Galicia, as well as gaining overlordship over Gascony. In the 12th century, however, the kingdom contracted to its core, and in 1162 King Sancho VI declared himself king of Navarre. Throughout its early history, the Navarrese kingdom engaged in frequent skirmishes with the Carolingian Empire, from which it maintained its independence, a key feature of its history until 1513. Kingdom and Crown of Aragon (1035–1706) The Kingdom of Aragon