171st Tunnelling Company
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The 171st Tunnelling Company was one of the tunnelling companies of the Royal Engineers created by the British Army during World War I. The tunnelling units were occupied in offensive and defensive mining involving the placing and maintaining of mines under enemy lines, as well as other underground work such as the construction of deep dugouts for troop accommodation, the digging of subways, saps, cable trenches and underground chambers for signals and medical services.
Plan of the deep mines at Trench 127
Plan of the deep mines at La Petite Douve Farm
Plan of the deep mines at Trench 122
The 1st Canadian Tunnelling Company was one of the tunnelling companies of the Canadian Military Engineers during World War I. The tunnelling units were occupied in offensive and defensive mining involving the placing and maintaining of mines under enemy lines, as well as other underground work such as the construction of deep dugouts for troop accommodation, the digging of subways, saps, cable trenches and underground chambers for signals and medical services.
Plan of the deep mine dug from the "Queen Victoria" gallery and placed by the 1st Canadian Tunnelling Company at St Eloi before the Battle of Messines