Abbasid forces decisively defeated the Saffarid emir Ya'qub ibn Laith, forcing the latter to halt his advance into Iraq. Battle of Dayr al-Aqul: The Battle of Dayr al-Aqul was fought on 8 April 876, between forces of the Saffarid ruler Ya'qub ibn Laith and the Abbasid Caliphate. Taking place some 80 km southeast (downstream) of Baghdad, the battle ended in a decisive victory for the Abbasids, forcing Ya'qub to halt his advance into Iraq. April 8, 876. Wiki link