Where to watch Why We Fight: Prelude to War (1942)
In US, Why We Fight: Prelude to War is streaming on fuboTV, MGM+ Amazon Channel, Philo, MGM Plus Roku Premium Channel, MGM Plus, GuideDoc, FlixFling.
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| Country | Stream (subscription) | Free | Free with ads | Rent | Buy |
|---|---|---|---|---|---|
| US |  fuboTV  MGM+ Amazon Channel  Philo  MGM Plus Roku Premium Channel  MGM Plus  GuideDoc  FlixFling |  Kanopy  Hoopla  Fawesome |  Plex  Plex Channel  Cineverse  Mometu  Tubi TV |  Amazon Video FlixFling | Amazon Video FlixFling |
| GB |  Amazon Prime Video GuideDoc  Amazon Prime Video with Ads | — | Tubi TV Plex  YouTube Free | Amazon Video | Amazon Video |
| CA | FlixFling GuideDoc | Hoopla | Tubi TV Plex Cineverse | FlixFling | FlixFling |
| AU | — | Hoopla | Tubi TV Plex | Amazon Video | Amazon Video |
| IN | — | — | Plex Plex Channel | — | — |
| BR |  Looke  Oldflix | — |  NetMovies Plex Plex Channel | — | — |
| DE | GuideDoc | — | Plex Plex Channel | — | — |
| ES | GuideDoc | — | Plex | — | — |
| FR | — | — | Plex Plex Channel | — | — |
| IE | GuideDoc | — | Plex | — | — |
| IT | — | — | Plex | — | — |
| JP | — | — | Plex | — | — |
| MX | — | — | Tubi TV Plex | — | — |
Availability data via JustWatch through TMDB. Listings change often — last refreshed 9 Oct 2026.