What was one of the primary reasons that the feudal system developed in medieval europe

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).

did you check the study guide?

an earnest tone.

because portia wants to know why brutus has been acting strange lately.