To protect its frontiers, the roman empire depended on mercenaries. what is a mercenary? a soldier who fights only for pay a treaty with a neighboring territory a military division that patrols borders a neighboring tribe

( A.)a soilder who fights only for pay !!!

either b) they were often feared and despised by other native cultures. or

c) their obsession allowed them to coexist with many other native cultures because of their peaceful nature.

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).