The Buyids, who were Shi'ite had the greatest influence not only in the provinces of Persia but also in the capital of the caliphate in Baghdad, and even upon the caliph himself. This new strength of considerable proportions enabled the Shi'ites to stand up before their opponents who previously had tried to crush them by relving upon the power of the caliphate. It also made it possible for the Shi'ites to propagate their religious views openly. 

As recorded by historians, during this century most of the Arabian peninsula was Shi'ite with the exception of some of the big cities. Even some of the major cities like Hajar, Uman, and Sadah were Shi'ite. 

In Basra, which had.always been a Sunni city and competed with Kufa which was considered a Shi'ite center, there appeared a notable group of Shi'ites. 

Also in Tripoli, Nablus, Tiberias, Aleppo, Nayshapur, and Herat there were many Shi'ites, while Ahwaz and the coast of the Persian Gulf on the Persian side were also Shi'ite. 

At the beginning of this century Nasir Utrush, after many years of propagation of his religious mission in northern Persia, gained power in.Tabaristan and established a kingdom which continuedfor several generations after him. Before Utrush, Hasan Ibn Zayd Al-Alawi had reigned for many years in Tabaristan. 

Also in this period the Fatimids, who were Isma'ili, conquered Egypt and organized a caliphate which lasted for over two centuries (296AH/908AD - 567AH/1171AD). 

Often disputation and fighting occurred in major cities like Baghdad, Cairo and Nayshapur between Shi'ites and Sunnis, in some of which the Shi'ites would gain the upper hand and come out victorious.