|Design||A dark blue banner charged with a white star|
The Bonnie Blue Flag was an unofficial banner of the Confederate States of America at the start of the American Civil War in 1861. It now often serves as a representative banner of the southeastern United States in general.[ dubious ][ citation needed] It consists of a single, five-pointed white star on a blue field. It closely resembles the flags of the short-lived Republic of West Florida of 1810, Congo under Belgian rule, and Somalia.
The first recorded use of this flag (typically with a white star) was in 1810 when it was used to represent the Republic of West Florida, a republic of English speaking inhabitants of southern Alabama, Mississippi, and portions of Louisiana east of the Mississippi River who rebelled against the reign of Spanish government and overthrew Spain's provincial Governor de Lassus at Baton Rouge. The republic's independence lasted barely three months, dissolved after the annexation of Louisiana's portion of the disputed land to the United States territory, acquired in the Louisiana Purchase.
Later referred to as the Burnet Flag, it was adopted by the Congress of the Republic of Texas on December 10, 1836. It consisted of an azure background with a large golden star, inspired by the 1810 flag of the Republic of West Florida.  Variants of the Burnet Flag with a white star, virtually identical to the Bonnie Blue Flag, were also common. Other variants featured the star (of either color) upside down, and/or ringed with the word Texas, with each letter filling one of the gaps of the star.
When the state of Mississippi seceded from the Union in January 1861, a flag bearing a single white star on a blue field was flown from the capitol dome.  Harry Macarthy helped popularize this flag as a symbol of independence, writing the popular song " The Bonnie Blue Flag" early in 1861. Some seceding Southern states incorporated the motif of a white star on a blue field into new state flags. 
Although the name "Bonnie Blue" dates only from 1861, there is no doubt that the flag is identical with the banner of the Republic of West Florida, which broke away from Spanish West Florida in September 1810 and was annexed by the United States 90 days later.   In 2006 the state of Louisiana formally linked the name "Bonnie Blue" to the West Florida banner by passing a law designating the Bonnie Blue Flag as "the official flag of the Republic of West Florida Historic Region". 
The "Bonnie Blue Flag" was used as an unofficial flag during the early months of 1861. It was flying above the Confederate batteries that first opened fire on Fort Sumter, beginning the Civil War. In addition, many military units had their own regimental flags they would carry into battle.
In 2007, one of six known Bonnie Blue flags from the Civil War era was sold at auction for $47,800. The flag had been carried by the Confederate 3rd Texas Cavalry and later exhibited as part of the 1936 Texas Centennial Exposition. 
In the 1936 novel by Margaret Mitchell and the film Gone with the Wind (1939), Rhett Butler names his newborn daughter "Bonnie Blue Butler" after Melanie Wilkes remarks that her eyes will be "as blue as the bonnie blue flag."  
- Flags of the Confederate States of America
- " The Bonnie Blue Flag" – 1861 song by Ulster-Scots entertainer Harry McCarthy.
- Flag of Somalia – A similar national flag in current use
- Flag of the Belgian Congo – A flag with an analogous star against a blue background motif. Formerly used by the Congo while it was still a Belgian colony (1908-1960).
- Allman, T.D. (2013). Finding Florida The True History of the Sunshine State (First ed.). New York: Atlantic Monthly Press. p. 63. ISBN 978-0-8021-2076-2.
- Jau Winik, "A New Flag for a New Mississippi," New York Times, Feb. 11, 2001, Week in Review section, p. 17.
- John Coski, The Confederate Battle Flag: America's Most Embattled Emblem (Harvard University Press, 2005), pp. 2–3.
- William C. Davis, The Rogue Republic: How Would-Be Patriots Waged the Shortest Revolution in American History (Houghton Mifflin Harcourt, 2011), p. 295.
- Jeanne Frois, Flags of Louisiana (Gretna, La: Pelican Pub. Co, 1995), p. 45.
- "2006 Louisiana Laws - RS 25:705 — Bonnie blue flag adopted". Justia US Law. Retrieved 2 Aug 2012.
- Heritage Auctions. "Rare Texas Confederate "Bonnie Blue" Flag of the 3rd Texas State Cavalry". Auction Web Press Release. ha.com. Retrieved 29 June 2012.
- Mitchell, Margaret. Gone with the Wind.
- Levitski, O.; Dumer, O. (Sep 2006). "Bestsellers: Color Symbolism and Mythology in Margaret Mitchell's Novel Gone with the Wind". Americana: The Institute for the Study of American Popular Culture.