In today’s video we will discuss the events that led to the schism within the Muslim community, as Islam split into two branches - Sunni and Shia Islam. This happened in the latter stages of the Early Muslim Expansion, as the Rashidun caliphs - Umar, Uthman and Ali were assassinated, which led to the war of succession, killing of Ali's son Husayn in Karbala, and the creation of the Umayyad dynasty under Muawiyah I.