Battle of the Camel
Ibn Umar participated in battles in Iraq, Persia and Egypt, but he remained neutral throughout the first civil war. In 656, he prevented his sister Hafsa from following Aisha to the Battle of the Camel. Following the peace-treaty that ensued between Hasan ibn Ali and Mu'awiyah, 'Abdullah ibn 'Umar, along with the rest of the Muslims agreed to pledge his allegiance to Muawiyah I so that he may accede to the Caliphate in 661/41 AH.