The first state refers to the state that takes a particular action or achieves a certain milestone before any other state.
Related terms
Secede: To withdraw or break away from a larger group or organization. In this case, it means that South Carolina decided to leave or secede from the United States.
Election of 1860: Refers to the presidential election held in 1860, where Abraham Lincoln was elected as president. This election played a significant role in triggering South Carolina's decision to secede.
Union: The term used for referring to all states that were part of the United States of America.