In her life Zainab (s.a.) always saw the evildoers, oppressors, insurgents and breakers of covenants defy the truth and Imam Ali (a.s.), the supporter of the truth and justice had to quell their revolts. Finally, an evil hand gave Imam Ali (a.s.) a stroke from a poisoned sword on his head in the mosque of Kufa. After Imam Ali (a.s.), his son Imam Hassan (a.s.) became the Caliph. Hassan was also greatly oppressed until at last he signed a peace treaty with the ruler of that time and moved to Kufa in the company of Zainab, her husband, and his own companions. Imam Hassan (a.s.) was poisoned by his treacherous wife Joda, by the order of the Caliph of that time. After Imam Hassan, Imam Hussain (a.s.) became the Imam, but the ruler of Syria Mavia violated the peace treaty and appointed his son Yazid as his successor and insisted that Imam Hussain (a.s.) should pledge allegiance to him. Imam Hussain refused to pledge allegiance and made up his mind to move to Mecca.