The Battle of Badr (), was fought March 17, 624 CE of western Arabia (present-day Saudi Arabia). It was a key battle in the early days of Islam and a turning point in Muhammad's struggle with his opponents among the Quraysh in Mecca. The battle has been passed down in Islamic history as a decisive victory because of divine intervention. Also, it is attributed to the genius of Muhammad. Although it is one of the few battles specifically mentioned in the Muslim holy book, the Qur'an, virtually all contemporary knowledge of the battle at Badr comes from traditional Islamic accounts, both hadiths and biographies of Muhammad, written decades after the battle.