The expansion of the Islamic rule during early Islamic era was quite impressive. Before 629, Muhammad's rule was limited to one city Medina. 15 years later, at the end of Umar's rule, the Caliphate ...
Other questions on this topic has addressed the pre-Islamic religious beliefs in broad detail, including the conversion of near-Arab cultures. What was the specific nature of the pre-Islamic ...
What was the dominant religion of the Arabic people when Prophet Muhammed started the Islamic religion?