 Despite improved relations between Mecca and Medina after the signing of the "Treaty of Hudaybiyya", a 10-year peace was to be broken by Quraish who, with their allies, the tribe of "Bakr", attacked the tribe of "Khuza'ah" who were allies of the Muslims.However, Muhammad considered the treaty broken.Abu Sufyan, the leader of the Quraish in Mecca, was aware that the balances were now tilted in Muhammad's favour, went to Medina to restore the treaty but Muhammad refused to accommodate him and Abu Sufyan returned to Mecca empty-handed.