Muhammad had preached the religion of Islam in Mecca from 613 to 622. He had attracted a small community of followers, but also drew staunch opposition from the rest of the Quraysh, the clan that ruled Makkah and to which he belonged. The Muslims fled Mecca in 622 after years of persecution and established themselves at Medina (formerly known as Yathrib). As such, they considered themselves to be in a state of war with Mecca and raided Meccan caravans. The Meccans sent out a small army to punish the Muslims and stop their raiding. At the Battle of Badr in 624, a small Muslim force defeated the much larger Meccan army.
Many Muslims considered this unexpected victory a proof that they had been favored by God and believed they were assured such victories in the future. A number of the leading tribesmen of Quraysh had been killed at Badr and so leadership passed to Abu Sufyan. He forbade the mourning of the losses at Badr, for he was eager to exact revenge upon Muhammad, vowing to conduct a retaliatory raid on the city of Medina. Several months later, Abu Sufyan accompanied a party of 200 men to the city, obtaining temporary residence with the chief of the Jewish tribe Banu Nadir and learning more of the current situation in Medina. He and his party then left Medina, burning down two houses and laying waste to some fields in fulfillment of his vow. Further skirmishes between the Meccans and the Muslims would occur thereafter.
