How did the first africans arrive to the americans

The first Africans arrived in Jamestown as indentured servants to work the tobacco farms

answer-the island had airfields that the u.s. military needed.

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).