Banu Bakr
Less than two years after the truce of Hudaybiyyah, the truce was broken by the Banu Bakr, allies of the Quraysh, who attacked the Banū Khuzaʽah, allies of the Muslims. According to Watt, Some of the Quraysh helped the Banu Bakr ambush the Khuza'ah. Muhammad gave the Meccans a chance to offer blood-money in retaliation, but they were unwilling to do so. Shortly afterwards, Muhammad secretly led a Muslim force of 10,000 men and headed for Mecca. They camped outside Mecca and the usual round of emissaries and negotiations began. Apparently Abu Sufyan had negotiated, then or earlier, a promise that he and those under him would not be attacked if they surrendered peacefully. A few Meccans from the Makhzum faction, prepared to resist.