<P> I am the servant of God and the brother of the Messenger of God . I am thus more worthy of this office than you . I shall not give allegiance to you (Abu Bakr & Umar) when it is more proper for you to give bay'ah to me . You have seized this office from the Ansar using your tribal relationship to the Prophet as an argument against them . Would you then seize this office from us, the ahl al - bayt by force? Did you not claim before the Ansar that you were more worthy than they of the caliphate because Muhammad came from among you (but Muhammad was never from AbuBakr family)--and thus they gave you leadership and surrendered command? I now contend against you with the same argument...It is we who are more worthy of the Messenger of God, living or dead . Give us our due right if you truly have faith in God, or else bear the charge of wilfully doing wrong...Umar, I will not yield to your commands: I shall not pledge loyalty to him .' Ultimately Abu Bakr said, "O' Ali! If you do not desire to give your bay'ah, I am not going to force you for the same . </P> <P> Ali's wife, and daughter of Muhammad, Fatimah, refused to pledge allegiance to Abu Bakr and remained angry with him until she died due to the issues of Fadak and her inheritance from her father and the situation of Umar at Fatimah's house . This is stated in sahih Sunni Hadith, Sahih Bukhari and Sahih Muslim . Fatimah did not at all pledge allegiance or acknowledge or accept the caliphate of Abu Bakr . Almost all of Banu Hashim, Muhammad's clan and many of the sahaba, had supported Ali's cause after the demise of the prophet whilst others supported Abu Bakr . </P> <P> It was not until the murder of the third caliph, Uthman, in 657 CE that the Muslims in Medina in desperation invited Ali to become the fourth caliph as the last source, and he established his capital in Kufah in present - day Iraq . </P> <P> Ali's rule over the early Muslim community was often contested, and wars were waged against him . As a result, he had to struggle to maintain his power against the groups who betrayed him after giving allegiance to his succession, or those who wished to take his position . This dispute eventually led to the First Fitna, which was the first major civil war within the Islamic Caliphate . The Fitna began as a series of revolts fought against Ali ibn Abi Talib, caused by the assassination of his political predecessor, Uthman ibn Affan . While the rebels who accused Uthman of prejudice affirmed Ali's khilafa (caliph - hood), they later turned against him and fought him . Ali ruled from 656 CE to 661 CE, when he was assassinated while prostrating in prayer (sujud). Ali's main rival Muawiyah then claimed the caliphate . </P>

Which of the following are the major groups of islam