What were some requirements that the berlin conference imposed on european nations claiming colonies in africa

nafta and the union are used as a trade between other countries these   organizations are used as spokes person for the country

answer: wait what

explanation:

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).

answer; taking up arms to defend the nation;