After confederate troops opened fire in fort Sumter, approximately how long did it take for the union surrendered

34 hours

Explanation:

At 4:40 a.m. on April 12, 1861, Confederate cannons opened fire on Fort Sumter and Union forces surrendered 34 hours later.

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).

the answer should be a. the sui empire, the tang empire extended from korea in the west to manchuria in the east.