Secret Tunnel Warfare
Season 43 Episode 1 | 52m 52s | Video has closed captioning.
During World War I, the Allies and Germans repeatedly struggled to break the hideous stalemate of trench warfare. In the winter of 1916, Allied engineers devised a massive surprise attack: over 1 million pounds of explosives hidden in secret tunnels driven under German lines. Building the tunnels was desperate work, with tunnelers at constant risk from flooding, cave-ins, and enemy digging teams.
Aired: 01/06/16
Expired: 01/10/18
