Ten southern states immediately followed South Carolina's secession from the Union in December 1860. These eleven rebellious states celebrated the formation of the Confederate States of America (CSA) on January 1, 1861. True or False?

The correct answer is: False

Explanation:

The Confederate States of America was originally formed by seven secessionist states: South Carolina, Mississippi, Florida, Texas, Alabama, Georgia, and Louisiana. The economic system of these states, located in the Southern region if the US, relied heavily on availability of slave labor of African-Americans in agriculture and plantations. The Confederacy was created in response to the threat to the institution of slavery that represented the election of Abraham Lincoln as President of the US.

It wasn't until after the beginning of the American Civil War, in 1861, that other four slave states - Virginia, Arkansas, Tennessee and North Carolina - joined.