19. Which event led directly to the secession of south carolina from the union

Abolitionists were people who wanted to end the institution of slavery. Abraham Lincoln was the first president to be a part of the Republican Party. The victory of Abraham Lincoln in the Election of 1860 led directly to South Carolina's secession from the United States.

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it further strained relations between the north and the south and convinced

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).