The Great Underground War - Season 1 - Eps 1: The Mines of Ypres
The British successfully used a mining technique known as 'clay kicking' to plant mines under German tunnels during three battles in Flanders. 500,000 soldiers were killed for 900 metres of gains.
About The Great Underground War

Title: The Great Underground War
First Air Date: 2014-08-10
Last Air Date: 2014-08-10
Status: Ended
Rating: 0/10 (from 0 votes)
Language: EN
Seasons: 1
Total Episodes: 5
Network: Fact TV UK
Genres: Documentary, War & Politics
Production Companies: Crowned Impala Communications, Millstream Films
Synopsis
A five-part series that explores the forgotten story of the incredible engineering feats and secret survival techniques of five legendary battles fought underground during World War I.
Cast

Andy Hawkins
Archaeologist

Julia Richardson
Archaeologist