Question:  Melanie Hamilton Wilkes is a fictional character first appearing in a novel whose story is set during what war?

Context articles: Gone with the Wind (film)
Gone with the Wind (novel)
Don Vincente
Thulsa Doom
Catwoman in other media
Duplicate Boy
Nyoka the Jungle Girl
Melanie Barnett
Melanie Hamilton
Peck's Bad Boy

Gone with the Wind is a 1939 American epic historical romance film adapted from Margaret Mitchell's 1936 novel of the same name.
 The film was produced by David O. Selznick of Selznick International Pictures and directed by Victor Fleming.
 Set in the American South against the backdrop of the American Civil War and Reconstruction era, the film tells the story of Scarlett O'Hara, the strong-willed daughter of a Georgia plantation owner, from her romantic pursuit of Ashley Wilkes, who is married to his cousin, Melanie Hamilton, to her marriage to Rhett Butler.
 The leading roles are portrayed by Vivien Leigh (Scarlett), Clark Gable (Rhett), Leslie Howard (Ashley), and Olivia de Havilland (Melanie).
Gone with the Wind is a novel by American writer Margaret Mitchell, first published in 1936.
 The story is set in Clayton County and Atlanta, both in Georgia, during the American Civil War and Reconstruction Era.
 It depicts the struggles of young Scarlett O'Hara, the spoiled daughter of a well-to-do plantation owner, who must use every means at her disposal to claw her way out of poverty following Sherman's destructive "March to the Sea".
 This historical novel features a "Bildungsroman" or coming-of-age story, with the title taken from a poem written by Ernest Dowson.
Don Vincente, also known as Don Vicente and Fray Vicents, is a fictional character whose story was first published as an anonymous article in the French newspaper "La Gazette des Tribunaux", in 1836.
 The legend was subsequently cited and reproduced as a true story in France and other countries through the 19th and early 20th centuries, while remaining virtually unknown in Spain.
 No historical evidence of Don Vincente or the criminal process against him has ever been found.
Thulsa Doom is a fictional character first appearing in the Kull short story "Delcardes' Cat" by Robert E. Howard.
 He has since appeared in comic books and film as the nemesis of Kull and, later, one of Howard's other creations, Conan the Barbarian.
 Thulsa Doom is the prototype for many of the future undead evil wizards, such as Tsotha-Lanti (in the Conan saga) and Kathulos (in the Skull Face novelette); other living or revenant Howardian practitioners of magic such as Thoth Amon, Thugra Khotan, Kathulos and Xaltotun bear some psychological similitudes to Thulsa Doom even if their outward appearance is vastly different.
Catwoman is a fictional character first appearing in "Batman" #1.
 After her debut she would appear in many forms of media appearing in the "Batman" TV series and its film adaption, "Batman Returns", the critically acclaimed "", the critically panned "Catwoman", the hit film "The Dark Knight Rises" and the popular "" series just to name a few.
Duplicate Boy (Ord Quelu of the planet Lallor) is a fictional superhero in the DC Comics Universe first appearing in a story by science fiction writer Edmond Hamilton in "Adventure Comics" #324 (September 1964).
 Hamilton had created a backstory for Duplicate Boy, who was first submitted as a super hero concept to DC comics by a young fan, Thea Temple, in 1963, who received acknowledgment from the company.
 Duplicate Boy appeared as a supporting character in the Legion of Super-Heroes titles, set approximately a thousand years in the future, and is one of the most powerful beings in that time-frame.
Nyoka the Jungle Girl is a fictional character created for the screen in the 1941 serial "Jungle Girl", starring Frances Gifford as Nyoka Meredith.
 The character of Nyoka is often described as having been created by Edgar Rice Burroughs; however, although the serial was officially based on Burroughs' story "Jungle Girl" (first appearing in the pulp magazine, "Blue Book", and later published as a novel), there is no character named Nyoka and no Nyoka-like character in the original story.
 The movie's credits list Burroughs along with six other writers, but his input on creating the film character was obviously minimal, because the studio later was able to use the name "Nyoka" in a sequel without crediting Burroughs at all.
 After the initial film, Nyoka appeared in comic books published by Fawcett, Charlton, and AC Comics.
Melanie Barnett-Davis is a fictional character who appears on the American sitcom "The Game", portrayed by actress Tia Mowry.
 Introduced in a backdoor pilot ("The Game") on the sitcom "Girlfriends" as Joan Clayton's cousin, Melanie chooses to support her boyfriend Derwin Davis' career in the fictional National Football League (NFL) team the San Diego Sabres rather than attend the medical program at Johns Hopkins University.
 The series primarily focuses on Melanie and Derwin's complicated relationship, with Melanie's fears of infidelity serving as the core of a majority of the episodes' storylines.
 Melanie's intelligence is one of her defining characteristics.
 Mowry departed the series in 2012 upon learning that her role would be reduced as a result of co-star Pooch Hall's decision to leave "The Game" in favor of appearing on the crime drama series "Ray Donovan".
 Both actors reprised their roles in the series finale, in which Melanie gives birth to twins.
Melanie Hamilton Wilkes is a fictional character first appearing in the novel "Gone with the Wind" by Margaret Mitchell.
 In the 1939 film she was portrayed by Olivia de Havilland.
 Melanie is Scarlett O'Hara's sister-in-law and eventually her best friend.
Henry "Hennery" Peck, popularly known as Peck's Bad Boy, is a fictional character created by George Wilbur Peck (1840–1916).
 First appearing in the 1883 novel "Peck's Bad Boy and His Pa", the Bad Boy has appeared in numerous print, stage, and film adaptations.
 The character is portrayed as a mischievous prankster, and the phrase "Peck's bad boy" has entered the language to refer to anyone whose mischievous or bad behavior leads to annoyance or embarrassment.
 Described as "a vicious little swaggerer" and "no more than a callous brute", Hennery's antics were more mean-spirited than those of earlier boyhood characters like Huckleberry Finn, and modern criticism views the violence and racism in the original stories as objectionable or politically incorrect.