Army Group North digs in

7th October 1941: The Wehrmacht moves to trench warfare around Leningrad

German soldiers from the First World War would have been familiar with the trenches and bunkers of the Leningrad front - which would soon develop along much of the Eastern Front.

A German machine gun position on the Eastern Front.

On the outskirts of Leningrad, the German army's strategy had shifted away from fast-moving Blitzkrieg warfare. The front settled into trench warfare, with conditions little different from the First World War. The difference was that now the German forces were not seeking to break out of the state of attrition. This was a siege.