Abu Muslim Khorasani was a prominent figure in the early Islamic period, known for his role in the Abbasid Revolution. Born in the region of Khorasan in present-day Iran, he became a key leader in the movement that overthrew the Umayyad Caliphate in the 8th century. His efforts helped establish the Abbasid Caliphate, which shifted the center of power in the Islamic world. As a skilled organizer and strategist, Abu Muslim garnered support from various groups discontented with Umayyad rule. His leadership and charisma were instrumental in mobilizing forces that ultimately led to the decisive battle at Great Zab in 750 CE, marking a significant turning point in Islamic history.