Nullification Crisis: This term refers to the conflict between the federal government and South Carolina in 1832 over the state's attempt to nullify a federal law, which ultimately laid some groundwork for secession.
States' Rights: This term refers to the belief that individual states have certain powers and rights separate from those of the federal government, which was a key factor leading to South Carolina's decision to secede.
Election of 1860: This term refers to the presidential election in which Abraham Lincoln, who was opposed by many southern states including South Carolina due to his anti-slavery stance, was elected as president. The election results played a significant role in triggering South Carolina's secession.