Which event caused southern states to secede from the union, just weeks after it happened?
a. the institution of stronger tariffs
b. the election of abraham lincoln
c. john brown's raid on harper's ferry
d.

Which is the best example of a primary source ducument useful in the study of history ?

Before 2010, haitian refugees were returned to their country without asylum hearings because

How did the invention of the cotton gin affect slave labor in the united states? a. there was a forced migration of slaves from the south to the north. b. slave-owning cotton planters were gradually forced to sell their plantations. c. more slaves were purchased to work on cotton plantations in the south. d. the reduced need for labor on cotton plantations led to a decline in slavery. e. slaves were moved from cotton plantations to sugar plantations.