In 1915, at a time when Austria, Germany and Italy were supposed to be allied, two Italian brothers are pitted against each other not only for divisive politics but also because they love the same girl, Anna, the niece of an Austrian lieutenant.
| Actor | Role |
|---|---|
 Brigitte BardotAnna | Anna |
 Pierre CressoyFranco Alberti | Franco Alberti |
 Lucia BosèElisabeth Tatabor | Elisabeth Tatabor |
 Giorgio AlbertazziConte Enrico Alberti | Conte Enrico Alberti |
 Camillo PilottoDon Eugenio - il parroco | Don Eugenio - il parroco |
 Tonio SelwartGeneral Renner | General Renner |
 Henri VidonLieutenant Schumann (as Henry Vidon) | Lieutenant Schumann (as Henry Vidon) |
| DDiana LanteCountess Alberti | Countess Alberti |
| NNino CapozziUn ufficiale | Un ufficiale |
| VVera CarmiCaporeparto | Caporeparto |
 Carlo DuseAgente di controspionaggio | Agente di controspionaggio |
| GGianni LudaDaniele Stuparich | Daniele Stuparich |
 Nino MarchesiniIl colonel medico | Il colonel medico |
 Sergio RaimondiBaldi | Baldi |