The Hindenburg Line was a system of defences built by the German Army during the winter of 1916/17. They officially called it the Siegfried Stellung (not to be confused with the Siegfriend Line) but the British believed it was called the Hindenburg Stellung – and the name Hindenburg Line adopted.
It was built as a response to the outcome of the Somme and the Germans believed that with a model system of defences with deep and wide trenches to stop tanks, thick belts of wire and bunkers, it would be impregnable. The battles of 1917 and 1918 proved otherwise as the British Army showed it was capable of dealing with
This image shows the Hindenburg Line around the village of Le Tronquoy on the Aisne; as yet untouched by shell fire. A sense of the depth of the trenches can be seen and the thick black marks are the belts of barbed wire, showing what a formidable obstacle they were. This section of the Hindenburg Line did not see serious fighting until the final stage of the war when it was breached in October 1918.