- Country: Spain
- Genres: Documentary
- Release: 2017-10-25
- Director: Paula Cons
- Writers: Paula Cons
- Language: Spanish
- Stars: N/A
- Runtime: 70 min
- Awards: 1 nomination
- AKA: The Hidden Battle (United Kingdom) , The Hidden Battle (United States of America) , La batalla desconocida , A batalla descoñecida (Spain) , The Hidden Battle
- Plot:
A Spanish documentary about the "Battle of tungsten" that the Allies fought against Spain over that metallic element, which was essential for the wartime industries during WW2.
- IMDB:tt6330172
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