Banu Bakr
Less than two years later, the tribe of Banu Bakr, which was allied with the Quraysh, broke the treaty when they attacked the Banu Khuza'ah, who were allied with the Muslims. Muhammad gave the violators 4 months to reconsider their position and demanded retributive justice for the victims. After this 4-month period expired, Muhammad marched with a 10,000-strong army toward Mecca.