The Southern states that seceded were:
- South Carolina (December 20, 1860)
- Mississippi (January 9, 1861)
- Florida (January 10, 1861)
- Alabama (January 11, 1861)
- Georgia (January 19, 1861)
- Louisiana (January 26, 1861)
- Texas (February 1, 1861)
- Virginia (April 17, 1861)
- Arkansas (May 6, 1861)
- Tennessee (June 8, 1861)
- North Carolina (May 20, 1861)
The secession of these Southern states ultimately led to the outbreak of the American Civil War in April 1861, as the federal government under President Abraham Lincoln moved to preserve the Union and prevent the secessionist states from establishing a new Confederate nation. The war ended in 1865 with the defeat of the Confederate States and the abolition of slavery in the United States.