Marwan ibn Muhammad ibn Marwan, commonly known as Marwan II, was the fourteenth and last caliph of the Umayyad Caliphate, ruling from 744 until his death. His reign was dominated by a civil war, and he was the last Umayyad ruler to rule the united Caliphate before the Abbasid Revolution toppled the Umayyad dynasty.
Dirham of Marwan II
The expansion of the Muslim Caliphate until 750, from William R. Shepherd's Historical Atlas. Muslim state at the death of Muhammad Expansion under the Rashidun Caliphate Expansion under the Umayyad Caliphate Byzantine Empire
The Third Fitna, was a series of civil wars and uprisings against the Umayyad Caliphate. It began with a revolt against Caliph al-Walid II in 744, and lasted until 747, when Marwan II emerged as the victor. The war exacerbated internal tensions, especially the Qays–Yaman rivalry, and the temporary collapse of Umayyad authority opened the way for Kharijite and other anti-Umayyad revolts. The last and most successful of these was the Abbasid Revolution, which began in Khurasan in 747, and ended with the overthrow of the Umayyad Caliphate and the establishment of the Abbasid Caliphate in 750.
Silver dirham of Marwan II
Silver dirham of Abdallah ibn Mu'awiya, minted in Jayy c. 746/7
A view of modern-day Kufa and its Great Mosque, where Saffah was proclaimed caliph
