Husayn ibn Ali

¿usayn ibn 'Ali ibn Abi ¿alib 3rd Sha'ban 4 AH 10th Muharram 61 AH; 8 January 626 AD 10 October 680 AD was the son of 'Ali ibn Abi ¿alib final Rashidun Caliph and first Shi'a Imam and Fatimah Zahra daughter of Muhammad. Husayn is an important figure in Islam as he is a member of the Ahlul Bayt the household of Muhammad and Ahlul Kisa, as well as being a Shi'a Imam, and one of The Fourteen Infallibles of Shi'a Twelvers. Husayn ibn 'Ali is revered by all Shi'a as a martyr who fought tyranny, as he refused to pledge allegiance to Yazid I, the Umayyad caliph. He rose up to create a regime that would reinstate a "true" Islamic polity as opposed to what he considered the unjust rule of the Umayyads. As a consequence, Husayn was killed and beheaded in the Battle of Karbala in 680 61AH by Shimr Ibn Thil-Jawshan. The anniversary of his Shahid "martydom" is called 'Ashura "tenth" day of Muharram and is a day of mourning for Shia Muslims. Revenge for Husayn's death was turned into a rallying cry that helped undermine the Umayyad caliphate, and gave impetus to the rise of a powerful Shi'ah movement.