Shia and Sunni Islam are the two major denominations of Islam. They chose sides following the death of the Islamic prophet Muhammad in AD 632. A dispute over succession to Islamic prophet Muhammad as a caliph of the Islamic community spread across various parts of the world, which led to the Battle of Jamal and Battle of Siffin. After the death of Prophet Muhammad, Muslims had a disagreement. Sunnis believed that Muhammad's successor should be Abu Bakr and Omar, and the Shias believed that his successor should be Ali. The dispute intensified greatly after the Battle of Karbala, in which Hussein ibn Ali and his household were killed by the ruling Umayyad Caliph Yazid I, and the outcry for revenge divided the early Islamic community, which is known today as Islamic schism to differ from Chri