The Heart of a Nation (French: Untel père et fils) is a 1943 French drama film directed by Julien Duvivier who co-wrote screenplay with Marcel Achard and Charles Spaak.

The film stars Raimu, Michèle Morgan and Louis Jouvet.

An American release featured an introduction by Charles Boyer and scenes of the German entry into Paris.

[2] Filming started in late 1939 but was interrupted by the war.

On January 25, 2005, the American version of the film that is dubbed into English and features a prologue by Charles Boyer was released by Alpha Video on DVD .