Joined the Confederacy, that is - Arkansas, Tennessee, Virginia, North Carolina.
The last four states to secede were Tennessee, North Carolina, Virginia and Arkansas. The border states were Kentucky, Missouri, Maryland and Delaware, later joined by the new breakaway state of West Virginia.
No U.S. states have four words in their names.
Delaware, Maryland, Kentucky, and Missouri
No states joined the Confederacy during the month of March 1861. Seven states joined the Confederacy prior to March 1861 and four more after that.
Connecticut, Minnesota, Tennessee, and Pennsylvania are four states that contain double N's in their names.
Ohio, Iowa, Utah, and a few others have four-letter names.
Four more states joined the Confederacy.
Ohio, Iowa, Utah
In the United States, there are four states that begin with the letter "W:" West Virginia, Wyoming, Washington and Wisconsin. Wisconsin joined in 1848, so all the others joined after this date.
Four US states have names ending with N.
There are four states in the United States that have compass terms in their names: North Carolina, South Carolina, West Virginia, and New Hampshire.
None. You're thinking of Fort Sumter. Lincoln's appeal for volunteers was taken as a declaration of war, and the four undecided states of the Upper South joined the Confederacy.