Duck Soup (1933)

Story:
Groucho is appointed to be the president of Freedonia; a small, bankrupt country on the brink of revolution. On top of this, the government of Sylvania (a neighbouring country) plans to overthrow Freedonia.
They send two clumsy secret agents, Chico and Harpo, to spy on Groucho.

Fueled by inspired silliness and blessed with some of the Marx brothers’ most brilliant work, Duck Soup is one of its — or any — era’s finest comedies.
Rotten Tomatoes Critics Consensus

Major accolades received by Duck Soup (1933)

Featured in Roger Ebert’s Great Movies list.
Included among the 1001 Movies You Must See Before You Die.
Selected for preservation in the United States National Film Registry by the Library of Congress as being “culturally, historically, or aesthetically significant”.