Count the stars on the Confederate flag. 13, I think.

1) "Seven Deep South cotton states seceded by February 1861, starting with South Carolina, Mississippi, Florida, Alabama, Georgia, Louisiana, and Texas. These seven states formed the Confederate States of America (February 4, 1861), with Jefferson Davis as president, and a governmental structure closely modeled on the U.S. Constitution. In April and May 1861, four more slave states seceded and joined the Confederacy: Arkansas, Tennessee, North Carolina and Virginia. Virginia was split in two, with the eastern portion of that state seceding to the Confederacy and the northwestern part joining the Union as the new state of West Virginia on June 20, 1863." So it were 7+4=11 Source: http://en.wikipedia.org/wiki/Secession_War#The_Confederacy 2) "The term border states refers to the five slave states of Delaware, Kentucky, Maryland, Missouri, and western Virginia which all had a common border with Northern Union states. In some of these states, there were both pro-Confederate and pro-Union governments, factions and men (sometimes even from the same family) that fought as soldiers on opposite sides in the American Civil War. West Virginia was formed in 1863 from the northwestern counties of Virginia that had seceded from Virginia after Virginia seceded from the Union. In the cases of Kentucky and Missouri, the states had two state governments during the Civil War, one supporting the Confederacy and one supporting the Union." Source and further information: http://en.wikipedia.org/wiki/Border_states_%28Civil_War%29 Further information: http://en.wikipedia.org/wiki/Confederate_States_of_America Those states did not secede. 3) "The official flag of the Confederate States of America, and the one actually called the "Stars and Bars", has seven stars, for the seven states that initially formed the Confederacy. This flag was sometimes difficult to distinguish from the Union flag under battle conditions, so the Confederate battle flag, the "Southern Cross", became the one more commonly used in military operations. The Southern Cross has 13 stars, adding the four states that joined the Confederacy after Fort Sumter, and the two divided states of Kentucky and Missouri." Source: http://en.wikipedia.org/wiki/Confederate_States_of_America#Confederate_flags 4) As a conclusion, there were 11 states which really seceded, but two more from the four border states were added on the flag, although they did not secede, but were just "divided".