عبيد الله بن زياد
On the other hand, the people in Kufa, when informed of Muawiyah's death, sent letters urging Husayn to join them and pledging to support him against the Umayyads. Husayn wrote back to them saying that he would send his cousin Muslim ibn Aqeel to report to him on the situation and that if he found them supportive as their letters indicated, he would speedily join them because an Imam should act in accordance with the Quran and uphold justice, proclaim the truth, and dedicate himself to the cause of God. The mission of Muslim was initially successful and according to reports, 18,000 men pledged their allegiance. But the situation changed radically when Yazid appointed Ubayd Allah ibn Ziyad as the new governor of Kufa, ordering him to deal severely with Ibn Aqeel.