Muhammad after the occupation of Mecca

Muhammad led the Conquest of Mecca in Ramadan of the Islamic year 8 AH (corresponding to Dec. 629/Jan. 630). The Quraysh in Mecca was Muhammad's final major rival in the Arabian Peninsula, and following the conquest, Muhammad focused his military operations on further expansion of his Islamic realm to the north, with a campaign against the Ghassanids and the Byzantine Empire.

Muhammad died on 8 June 632. The period following his death, known as the first fitna, was one of significant divide in the Islamic world, characterized by internal conflict between the Muslims caused by the issue of succession to Muhammad, further worsening the Shia-Sunni divide.