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747 CE - 750 CE: Abbasid Revolution.
750 CE: Death of Imam Ibrahim, the leader of the Abbasid clan - he was succeeded by his brother Abu Abbas.
750 CE - 754 CE: Reign of Abu Abbas As-Saffah.
750 CE: Fall of the Umayyad Caliphate.
750 CE: Start of the Abbasid Caliphate.
751 CE: Battle of Talas (Tang-Abbasid war; followed by amiable diplomatic relations).
754 CE - 775 CE: Reign of Al-Mansur over the Abbasid Caliphate.
755 CE: Death of Abu Muslim, the mastermind of the Abbasid revolution.
756 CE: Abd al-Rahman I establishes the Emirate of Cordoba.
756 CE - 788 CE: Reign of Abd al-Rahman I over the Emirate of Cordoba.
775 CE - 785 CE: Reign of al-Mahdi.
785 CE - 786 CE: The reign of al-Hadi.
786 CE - 809 CE: The reign of Harun al-Rashid.
800 CE - 909 CE: Aghlabids given autonomy over Ifriqya and western half of Sicily.
806 CE: Harun al-Rashid's famous invasion into Byzantine territories.
809 CE - 813 CE: Reign of al-Amin.
813 CE - 833 CE: Reign of al-Ma'mun.
833 CE - 842 CE: Reign of al-Mu'tasim.
842 CE - 847 CE: Reign of al-Wathik.
847 CE - 861 CE: Reign of al-Mutawakkil.
861 CE: Al-Mutawakkil is killed in a palace coup instigated by his Turkish bodyguards.
861 CE - 862 CE: Reign of al-Muntasir.
909 CE: Fatimids overthrow the Aghlabids in Ifriqya.
909 CE - 1171 CE: Fatimids rule as an anti-Caliphate to the Abbasids.
945 CE: Buyids take possession of Baghdad.
1055 CE: Seljuks oust the Buyids and take control of Baghdad.
1092 CE - 1135 CE: Reign of al-Mustarshid; revival of military strength begins.
1135 CE: Al-Mustarshid is killed by the Seljuks.
1136 CE - 1160 CE: Reign of al-Muktafi; revival of military strength is completed.
1157 CE: Seljuks besiege Baghdad but are unable to penetrate it.
1171 CE: Saladin abolishes the Fatimid Caliphate.
1174 CE - 1193 CE: Reign of Saladin, Sultan of Egypt and Syria, and founder of the Ayyubid dynasty.
1225 CE: Death of al-Nasir, the last able Abbasid ruler.
1250 CE - 1517 CE: Mamluk Sultanate.
1258 CE: The Mongols conquer the Abbasid Caliphate. During this campaign there is the infamous sacking of Baghdad and murder of the caliph.
1260 CE: Battle of Ain Jalut; Mongol advance to the heartland of Islam is halted.
1261 CE - 1517 CE: Abbasid "shadow caliphs" are kept in Cairo by their Mamluk overlords.
1517 CE: Sultan Selim I of the Ottoman Sultanate conquers the Mamluk Sultanate and transfers the caliphal title to his lineage.