Trench warfare

The Battle of Ancre and the Advance of the Tanks is a grainy, black and white, record of life on the frontline in 1917.

To commemorate Remembrance Day, Dan looks for clues about the footage, trying to find out where it was filmed, if any of the participants are still alive and even if parts of the film were faked.

A sombre reminder of the hideous conditions of war.

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