Louis Pergaud (22 January 1882 – 8 April 1915) was a French writer and soldier, whose principal works were known as "Animal Stories" due to his featuring animals of the Franche-Comté in lead roles. His most notable work was the novel La Guerre des boutons (1912) (English: The War of the Buttons). It has been reprinted more than 30 times, and is included on the French high-school curriculum.A schoolteacher by profession, Pergaud came into conflict with Roman Catholic authorities over the implementation of the Third French Republic's separation of Church and State enacted in 1905. In 1907 Pergaud chose to move to Paris to pursue his literary career. Pergaud's prose works are often considered to reflect the influences of Realist, Decadent and Symbolist movements. He was killed at age 33 in April 1915, by French fire while in a field hospital behind German lines; he was serving with the French Army near Marchéville-en-Woëvre during the First World War.
The War of the Buttons has been adapted five times as a film, four times in French productions and once in an Irish one. It was adapted most recently in France in two films released the same week in September 2011. Both were set during the twentieth century.