Important dates and timelines for Abbasid Caliphate
632 CE
Prophet Muhammad has died in Medina
632-634 CE
Followers of Muhammad spread Islam through the Arabian Peninsula, uniting it under Abu Bakr, the first caliph.
651 CE
Abu Bakr and his followers have taken over two-thirds of the Eastern Roman Empire and almost all of the Sassanid Empire
656
The third Caliph, Uthman, is assassinated
656-661 CE
First Muslim Civil war, or Fitna
661 CE
Ali, son-in-law of Prophet Muhammad, is assassinated at Kufa
680-692 CE
Second Fitna.
747 CE
Abu Muslim of the Abbasids leads a revolt in easter Khorasan
749 CE
Kufa is occupied by the Abbasids
750 CE
Marwan, the last Umayyad Caliph, is pursued and killed in Egypt. Abbasids officially have leadership of the whole Caliphate