 The term dates to the early 19th century and the rise of the Lower South, which became noted for its differences from the more northerly parts of the American South.In antebellum times, the term Upper South generally referred to the slave states north of the Lower or Deep South.During the American Civil War era, the term Upper South was often used to refer specifically to the Confederate states that did not secede until after the attack on Fort Sumter—Virginia, North Carolina, Tennessee, and Arkansas.