The roman army was composed mostly of what group of romans

The legions was composed mostly of the roman groups.

answer: you could try asking a family member maybe?

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).