What is "chouans!"

Chouans! is a 1988 French historical adventure film directed by Philippe de Broca and starring Sophie Marceau, Philippe Noiret, and Lambert Wilson. Based on the 1829 novel Les Chouans by Honoré de Balzac, the film is about a woman who must choose between two brothers on opposite sides of the French Civil War of 1793. For her performance in the film, Sophie Marceau received the Cabourg Romantic Film Festival Award for Best Actress.