Caliphs Timeline (1)

632:
The death of Muhammad(SAW) at Medina is followed by the election of the first caliph, Abu Bakr(RA), a father-in-law of the prophet
634:
Omar, another father-in-law of Muhammad, is elected as the second Muslim caliph
644:
After the assassination of Omar, Othman is elected as the third Muslim caliph
650:
The revelations made to Muhammad are collected in their definitive form as the Qur'an, under the caliph Othman
656:
Othman is assassinated, and Ali wins power as the fourth Muslim caliph - defeating Aisha at the 'battle of the camel' near Basra
661:
Ali is assassinated, and Mu'awiya becomes the fifth Muslim caliph and establishes the Umayyad dynasty
670:
With the entire middle east under their control, the Arabs make Damascus the capital of the Umayyad caliphate
750:
The Abbasids massacre the Umayyads in Damascus and establish a new caliphate
762:
The Abbasid caliphs create Baghdad as a new capital city on the Tigris
800:
The luxury of Baghdad, under the caliph Harun al-Rashid, is evident in the Thousand and One Nights