The 1933 Marx Brothers comedy set in the fictional country of Freedonia is Duck Soup. Groucho Marx plays Rufus T. Firefly, a chaotic new leader whose reckless decisions help push Freedonia toward war with neighboring Sylvania.
Directed by Leo McCarey, the film was written by Bert Kalmar and Harry Ruby, with additional dialogue from Arthur Sheekman and Nat Perrin. It stars Groucho, Harpo, Chico, and Zeppo Marx; Zeppo's appearance was his final film role with the brothers. Margaret Dumont plays the wealthy Mrs. Teasdale, whose support helps place Firefly in power.
Duck Soup was released by Paramount Pictures on November 17, 1933, and was the brothers' fifth and final Paramount film. Its anti-war satire and anarchic political humor were not universally appreciated at release, and it was a financial disappointment, though not the outright failure sometimes claimed. The fictional country is Freedonia—not Sylvania, which is its rival.