History -- 59 History 14 Caliphs 12 Islam 5 Islam -- 5 Caliphate 4 Religious aspects -- 3 more ... Caliphs -- 2 Dissertations, Academic 2 Historiography -- 2 Islam and politics -- 2 Muslim women -- 2 Politics and government 2 Riddah Wars 2 Siffin, Battle of, Syria, 657 2 Abbasids 1 Apostasy -- 1 Arabs -- 1 Biography 1 Biography -- 1 Caliphate -- 1 Camel, Battle of the, Iraq, 656 1 Circassians -- 1 Conduct of life 1 Dissertations 1 Economic consitions 1 History, Military 1 Industries -- 1 Islam and state 1 Islam and state -- 1 less ...