Al-Hajjaj ibn Yusuf

Caliph Abd al-Malik appointed Al-Hajjaj ibn Yusuf as governor of Iraq. He was tasked with restoring order after years of rebellion and instability. His appointment marked the beginning of a harsh and effective administration.

Al-Hajjaj ibn Yusuf commissioned the introduction of diacritical marks (dots) to the Arabic script to standardize the reading of the Quran and prevent mispronunciation. This reform had a lasting impact on Arabic writing and Islamic scholarship.

Al-Hajjaj ibn Yusuf led Umayyad forces to a decisive victory over the rebel army of Abd al-Rahman ibn al-Ash'ath at Dayr al-Jamajim in Iraq. The victory crushed a major rebellion and solidified Umayyad control over Iraq and the eastern provinces.