The Persian empire was successful is because of their tolerance of non Persian citizens living in Persia. Persia also conquered many places making it successful.
Well in the colonial days they had long hard winters short growing seasons main industry was ship building and costal industry they had rocky soil and coast lines and were very populated
The rise of power can cause problems if ghana rises so they would cause a war if umayyad did they would cause a system mathematical droubt but if this isn't the answer and this is a multiple choice answers please post them
