Why did the early Caliph follow an expansionist policy? Which factors contributed to their success?

Why did the early Caliph follow an expansionist policy? Which factors

1.	Why did the early Caliph follow an expansionist policy? Which factors contributed to their success?
Answer» Solution :The early Caliph followed an expansionist POLICY because : (i) They were well aware the fact that .Umma. could not be maintained but the modest income taken through trade and taxes. (ii) They realised that a rich booty be obtained by expediting raids. (iii) The Byzantine and Sassarian empires patronised Christianity and Zoroastrianism RESPECTIVELY. On the eve of Arab.s invasion both these empires began to DECLINE. This provided an opportunity to the Arabs to expand their empire. The following factors contributed to their success : (i) Arabs used camels which could WORK easily in desert regions. (ii) Both Byzantine and Sassarian empires were not in a position to FACE the determined challenges of Arab, because they were on the way of their decline.