- Shortly before this film premiered, the city of Fredonia, New York, complained about the use of its name with an additional "e". The Marx Brothers' response was: "Change the name of your town, it's hurting our picture."
- The mirror trick was previously used in Floorwalker, The (1916).
- During the battle scene, Groucho wore five different uniforms: A Union soldiers uniform, a Confederate general's uniform, a boy scout troop leader's uniform, a Revolutionary War-era British general's uniform, and a Davy Crockett outfit.
- Edgar Kennedy delivers his famous "slow burn" in a minor role as a street vendor. In 1942 he played the lead in a short of his own also called "Duck Soup".
- This film marks the last appearance of Zeppo in a Marx Brothers film. He opted to work behind the scenes from then on.
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