Hindenburg Line

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The Hindenburg Line was a vast system of defences in Northern France constructed by the Germans during the winter of 1916-17 during World War I. It ran from the area around Arras to beyond St Quentin, and consisted of deep and wide trenches, thick belts of barbed wire, machine-gun positions, concrete bunkers, tunnels and command posts. The Germans considered it virtually impregnable, but a successful Allied offensive in September 1918 proved otherwise.