What did some of the states do when Lincoln became president?

Several southern states took action in response to Abraham Lincoln's election as President of the United States in 1860. Ten southern states seceded from the Union and formed the Confederate States of America. These states were:

1. South Carolina (December 20, 1860)

2. Mississippi (January 9, 1861)

3. Florida (January 10, 1861)

4. Alabama (January 11, 1861)

5. Georgia (January 19, 1861)

6. Louisiana (January 26, 1861)

7. Texas (February 1, 1861)

8. Virginia (April 17, 1861)

9. Arkansas (May 6, 1861)

10. Tennessee (June 8, 1861)

These states acted due to concerns over the preservation of slavery and states' rights. They viewed Lincoln's election as a threat to their way of life and feared that the federal government would attempt to abolish slavery. The secession crisis led to the outbreak of the American Civil War in April 1861, which lasted until 1865 and resulted in the defeat of the Confederacy and the preservation of the Union.