Timeline - World History Documentaries | How A Small French Town Became The Heart Of WW1 Mine Warfare | The Great Underground War | Timeline @TimelineChannel | Uploaded September 2023 | Updated October 2024, 12 hours ago.
For three years the Germans and French blew each other up with massive explosions, using a maze of underground galleries and tunnels. The whole story is told through the preserved diaries of Herman Hoppe, a German engineer who built many of the tunnels.

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