Before his death in 1065, Ferdinand divided his widespread conquests in central Spain between his five children, charging them to live at peace with one another. Ferdinand's oldest son,
Sancho II, received Castile and the tribute from
Zaragoza;
Alfonso VI received
León and the tribute from
Toledo; and
García II received Galicia. His daughters,
Elvira and Urraca, received
Toro and
Zamora respectively. Sancho, however, resolved to rule over his father's entire kingdom and made war on his siblings. By 1072, Sancho had overthrown his youngest brother Garcia, and forced his other brother Alfonso to flee to his
Moorish vassal city of Toledo. Toro, the city of Sancho's sister Elvira, fell easily. But in a siege of Urraca's better-defended city of Zamora, King Sancho was stalled, and was then mysteriously assassinated on 7 October 1072. It was widely suspected that the assassination was a result of a pact between Alfonso and Urraca. The
Chronicle of the Cid, purportedly written by one of
the Cid's followers, states that the assassin was a nobleman of Zamora, who then received sanctuary in the city. The chronicle is careful not to place any direct blame on Alfonso or Urraca, just as it takes pains to stress that the participation of the Cid at the siege of Zamora was involuntary and supposedly forced on him by King Sancho. ==Alfonso's reign==