As a historian specializing in American Civil War history, I can provide you with the accurate information regarding the secession of states from the Union.
The state that was the first to secede from the United States in 1860 was
South Carolina. This pivotal event occurred on December 20, 1860, after a series of political and economic disagreements between the Northern and Southern states, which were primarily centered around the issues of states' rights and, particularly, the expansion of slavery into new territories.
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