The Nullification Convention met in 1832. The convention declared the tariffs of 1828 and 1832 unconstitutional and unenforceable within the state of South Carolina after February 1, 1833. Decision of forcefully collecting taxes caused conflict between South Carolina and the United States.
Explanation:
The Ordinance of Nullification was caused by the belief that the tariffs of 1828 and 1832 favored the North over the South and therefore violated the Constitution. This led to the protest and conflict in between South Carolina and United States.
The imposition of tariffs argued that the U.S. Constitution gave rights to the states to block the enforcement of a federal law. Congress passed the new negotiated tariff to South Carolina. The convention declared the tariffs of 1828 and 1832 unconstitutional and unenforceable within the state of South Carolina after February 1, 1833.
It was the international governmental organization the "League of Nations" that the United States declined to join after World War I, since the nation wanted to avoid getting tangled up in any future European wars.
I feel emancipation proclamation was probably one of the bigger turning point but what came after C which was WWII was also quite significant.
In the mid-nineteenth century writers such as Nathaniel Hawthorne and Herman Melville produced works of fiction that even today, centuries later, help to define what American literature means.