What was the result of the attack on the surrender of fort sumter in the north and the south

The surrender concluded a standoff that began with South Carolina’s secession from the Union on December 20, 1860

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).