Longeverne is a fictional village featured in the novel "The War of the Buttons," written by Louis Pergaud. The story revolves around the rivalry between two groups of children from Longeverne and a neighboring village, Velrans. The narrative highlights themes of childhood, friendship, and the innocence of youth, set against the backdrop of rural France. The children's playful battles often involve the symbolic act of cutting off buttons from their opponents' clothing, representing their conflicts and camaraderie.