1820: Missouri Compromise: This compromise declared slavery illegal in the Northwest Territory and allowed Missouri to enter the Union as a slave state. This compromise was intended to balance the number of slave-holding and free states, but it also solidified sectional differences and North-South tensions in the United States.
1830: States’ Rights: South Carolina passes Ordinance of Nullification, declaring that federal laws regulating tariffs were not binding on the state. This represented the first clear assertion of states’ rights by a state government, which would be one of the primary causes of the Civil War.
1832: Nullification Crisis: In response to South Carolina’s declaration of the Ordinance of Nullification, President Andrew Jackson imposed a federal tariff on the state. This crisis lead to further division between the North and the South and helped to create a more sectional dynamic.
1850: Compromise of 1850 and the Georgia Platform: The Compromise of 1850, which was brokered by Senator Henry Clay, including the addition of the Fugitive Slave Act in order to create a more even balance between free and slave states. The Georgia Platform was a letter sent by a group of Southern statesmen that declared that they would resist any attempt to violate the Compromise.
1857: Dred Scott Case: The Supreme Court issued a ruling in this case that declared that African Americans, both free and enslaved, were not legally citizens of the United States. This case again showed the increasingly sectional nature of the United States and further highlighted the differences between the North and South.
1860: Election of 1860: With the election of Abraham Lincoln as President, the Republican Party was firmly in control of the federal government. Since the Republican Party was largely anti-slavery, this election helped to solidify sectional differences between the North and South and intensified a sense of crisis between the two areas.
1860- 1861: Debates over Secession: Following the election of President Lincoln, the Southern states declared their secession from the United States and joined together in the Confederate States of America. This secession was seen as an act of rebellion against the federal government, and intensified the feelings of crisis and led to the onset of the Civil War.