A historian who Compares World Events during The Classical era to world events during the modern era is organizing history by

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

yuy neded   ot chows usss charts   owoi cwioej oie