 The conflicts began after the death of their mother Queen Sancha on 7 November 1067, leading to seven years of war between the three brothers.The first skirmish was the Battle of Llantada, a trial by ordeal in which both brothers agreed that the one who was victorious would obtain the kingdom of the defeated brother.Although Sancho II was the winner, Alfonso VI did not comply with the agreement; even so, relations between them remained cordial as evidenced by the fact that Alfonso was present at the wedding of Sancho II to an English noblewoman named Alberta on 26 May 1069.