Can someone pls help me with this QUESTION: Identify ONE way in which technological advancement allowed the invasions illustrated on the map (in 3 paragraphs)

they are best described as reliable search engines.

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).