| Original title | Prelude to War | 
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| Danish title | Hvorfor blev der Krig? | 
| Efnisorð | Anden Verdenskrig, 1940-1949, 1930-1939, Nazisme, Japan, Tyskland, Italien | 
| Leikstjórn | Frank Capra, Anatole Litvak | 
| Screenplay | Julius J. Epstein, Philip G. Epstein, Robert Heller, Eric Knight, Anthony Veiller | 
| Editor | William Hornbeck | 
| Composer | Hugo Friedhofer, Leigh Harline, Arthur Lange, Cyril J. Mockridge, Alfred Newman, David Raskin | 
| Land | USA | 
| Technical info | Sort-hvid | 
      Companies | 
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| Production company | The War department | 
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      Instruktion | 
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| Instruktion | Frank Capra | 
| Instruktion | Anatole Litvak | 
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      Manus | 
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| Manus | Julius J. Epstein | 
| Manus | Philip G. Epstein | 
| Manus | Robert Heller | 
| Manus | Eric Knight | 
| Manus | Anthony Veiller | 
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      Produktion | 
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| Produktion | Frank Capra | 
| Produktion | Anatole Litvak | 
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      Klip | 
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| Klip | William Hornbeck | 
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      Musik | 
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| Musik | Hugo Friedhofer | 
| Musik | Leigh Harline | 
| Musik | Arthur Lange | 
| Musik | Cyril J. Mockridge | 
| Musik | Alfred Newman | 
| Musik | David Raskin | 
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      Fortæller | 
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| Fortæller | Walter Huston | 
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