The Battles of the Hindenburg Line and associated actions
12 September - 12 October 1918. As the momentum of the British advance continued it was clear that the Hindenburg Line defences offered the greatest threat to further advances. It was highly likely that the magnificently engineered defence system would re-establish the status quo of static trench warfare. However a series of magnificent actions at Havrincourt and Epehy paved the way for dramatic crossings of the Canal du Nord and the St Quentin Canal by early October. Both canals had been integrated into the Hindenburg Line system and their capture effectively broke the defensive capability of the system. Soon afterwards the British were attacking at Cambrai (again) and then by mid October were pursuing the Germans to the River Selle.