Hidden deep in the woods near Verdun, France, lies Camp Marguerre, where the German army tested the use of concrete during the First World War.
During the final months of World War I, the British Army Troop Company Royal Engineers erected a concrete bridge over the Kemmelbeek near Ypres.
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Hidden deep in the woods near Verdun, France, lies Camp Marguerre, where the German army tested the use of concrete during the First World War.
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