The Wikipedia article of the day for November 7, 2019 is
Second Fitna.
The Second Fitna was a civil war in the Islamic community that began with the death of Mu'awiya I in 680. The first Umayyad caliph, he had become the sole ruler of the caliphate at the end of the First Fitna in 661, when Ali was assassinated and Ali's successor abdicated. After Mu'awiya's death one of Ali's sons, Husayn ibn Ali, was invited to overthrow the Umayyads but was killed with his small company at the Battle of Karbala. His supporters continued the fight but were crushed by the Umayyads at the Battle of Ayn al-Warda in 685. A second challenge by Abd Allah ibn al-Zubayr was initially successful, as most provinces recognized him as caliph. Under the leadership of Abd al-Malik ibn Marwan (depicted), the Umayyads reasserted control over the caliphate after defeating Ibn al-Zubayr's forces at the Battle of Maskin and killing him in the Siege of Mecca in 692. The events of the Second Fitna intensified sectarian tendencies in Islam, leading to what would become the Sunni and Shi'a sects.
