Question: The Moods of Marianne is the basis for the film that depicts French society just before what event?

Context articles: Le Lys dans la vallée
The Quiet American
The Moods of Marianne
Honorine (novel)
Black and White in Color
Two Friends (2015 film)
La Fausse Maîtresse
Albert Savarus
Colonel Chabert (novel)
The Rules of the Game

Le Lys dans la Vallée (English: The Lily of the Valley) is an 1835 novel about love and society by French novelist and playwright Honoré de Balzac (1799–1850).
 It concerns the affection — emotionally vibrant but never consummated — between Felix de Vandenesse and Henriette de Mortsauf.
 It is part of his series of novels (or "Roman-fleuve") known as "La Comédie humaine" ("The Human Comedy"), which parodies and depicts French society in the period of the Bourbon Restoration and the July Monarchy (1815–1848).
 In his novel he also mentions the chateau Azay-le-Rideau, which can still be visited today.
The Quiet American is a 1955 novel by English author Graham Greene which depicts French colonialism in Vietnam being uprooted by the Americans during the 1950s.
 The novel implicitly questions the foundations of growing American involvement in Vietnam in the 1950s and is unique in its exploration of the subject topic through the links among its three main characters - Fowler, Pyle and Phuong.
 The novel has received much attention due to its prediction of the outcome of the Vietnam War and subsequent American foreign policy since the 1950s.
 Graham Greene portrays a U.S. official named Pyle as so blinded by American exceptionalism that he cannot see the calamities he brings upon the Vietnamese.
 It was adapted as two different movies during 1958 and 2002.
 The book uses Greene's experiences as a war correspondent for "The Times" and "Le Figaro" in French Indochina 1951–1954.
 He was apparently inspired to write "The Quiet American" during October 1951 while driving back to Saigon from Ben Tre province.
 He was accompanied by an American aid worker who lectured him about finding a "third force in Vietnam” .
The Moods of Marianne (French: "Les Caprices de Marianne") is an 1833 play by the French dramatist Alfred de Musset.
 It served as the basis for Jean Renoir's film "The Rules of the Game" (1939).
Honorine is an 1843 novel by French novelist and playwright Honoré de Balzac (1799-1850) and included in his series of novels (or "Roman-fleuve") known as "La Comédie humaine" ("The Human Comedy") which parodies and depicts French society in the period of the Restoration and the July Monarchy (1815-1848).
 Balzac has a subtle way of approaching his plot indirectly and embedding a story within a story.
 The story is perhaps a common one of a wife trapped in a marriage, but is approached in an interesting manner.
Black and White in Color (French: La Victoire en chantant , then Noirs et Blancs en couleur for the 1977 re-issue) is a 1976 war film and black comedy directed by Jean-Jacques Annaud in his directorial debut.
 It depicts French colonists at war with the Germans in Central Africa during World War I, and is set the then German colony of Kamerun.
 The film adopts a strong antimilitaristic point of view, and is noteworthy for ridiculing the French side even more harshly than their German counterparts.
Two Friends (French: Les Deux Amis ) is a 2015 French romantic dramedy film directed by Louis Garrel and co-written by Garrel and Christophe Honoré.
 The film is loosely based on the play "The Moods of Marianne" by Alfred de Musset.
 It was selected to screen in the International Critics' Week section at the 2015 Cannes Film Festival.
La Fausse Maîtresse is an 1843 novel by French novelist and playwright Honoré de Balzac (1799-1850) and included in his series of novels (or "Roman-fleuve") known as "La Comédie humaine" ("The Human Comedy") which parodies and depicts French society in the period of the Restoration and the July Monarchy (1815-1848).
 The plot is subtle and complex, and the true explanation is carefully hidden until the end of the book.
Albert Savarus is an 1836 novel by French novelist and playwright Honoré de Balzac (1799–1850) and included in his series of novels (or "Roman-fleuve") known as "La Comédie humaine" ("The Human Comedy") which parodies and depicts French society in the period of the Restoration and the July Monarchy (1815–1848).
Le Colonel Chabert (English: "Colonel Chabert") is an 1832 novella by French novelist and playwright Honoré de Balzac (1799–1850).
 It is included in his series of novels (or "Roman-fleuve") known as "La Comédie humaine" ("The Human Comedy"), which depicts and parodies French society in the period of the Restoration (1815–1830) and the July Monarchy (1830–1848).
 This novella, originally published in "Le Constitutionnel", was adapted for six different motion pictures, including two silent films.
The Rules of the Game (original French title: La Règle du Jeu) is a 1939 French film directed by Jean Renoir.
 It features an ensemble cast of Nora Gregor, Paulette Dubost, Mila Parély, Marcel Dalio, Julien Carette, Roland Toutain, Gaston Modot, Pierre Magnier and Jean Renoir himself.
 Renoir's portrayal of the wise, mournful Octave anchors the fatalistic mood of this pensive comedy of manners.
 The film depicts members of upper-class French society and their servants just before the beginning of World War II, showing their moral callousness on the eve of impending destruction.