Operation Swallow: The Battle for Heavy Water

Operation Swallow:
The Battle for Heavy Water
Operation Swallow: ; The Battle for Heavy Water
	From left, Joachim Rønneberg, Jens-Anton Poulsson and Kasper Idland receive King Haakon VII of Norway at the premiere of Operation Swallow: The Battle for Heavy Water (1948)
	Kampen om tungtvannet
Directed by	Jean Dréville; Titus Vibe-Müller
Written by	Arild Feldborg, Jean Marin, Dinah Robertson, etc.
Starring	Jens-Anton Poulsson; Johannes Eckhoff; Arne Kjelstrup; Claus Helberg; Henki Kolstad; Claus Wiese; Knut Haukelid; Fredrik Kayser; Andreas Aabel;
Cinematography	Hilding Bladh; Marcel Weiss
Edited by	Jean Feyte
Music by	Gunnar Sønstevold
Distributed by	Hero Film; Trident
Release date	1948;
Running time	98 minutes
Countries	Norway; France
Language	Norwegian
Box office	5,373,377 admissions (France)

Operation Swallow: The Battle for Heavy Water (original title: Kampen om tungtvannet, French title: La Bataille de l'eau lourde) is a Norwegian-French film from 1948. The history is based on the best known commando raid in Norway during World War II, where the resistance group Norwegian Independent Company 1 destroyed the heavy water plant at Vemork in Telemark in February 1943.

The film is basically a reconstruction of real events, a docudrama, with many of the participants playing themselves in the film. It was filmed on location in Norway.