He is the Fourth Rightly Guided Caliph, the paternal cousin of the Messenger of Allah (Sallallahu Aleh Wassalam), the father of Al-Hassan and Al-Hussein (the leaders of the youth in Jannah) and the beloved husband of Fatima (May Allah be pleased with them all).
Please watch this video to raise awareness among common masses (Muslims) about the Fitan during his 4 years of reign that he had to go through after the death of Uthman Radiallahu Anhu.