Hundred Days, Cambrai-St. Quentin and Selle

The Hundred Days, 18 July-11 November 1918, was the final Allied offensive of the First World War on the Western Front.
The battle of Cambrai-St. Quentin, 27 September-9 October 1918, was the main British contribution to Marshal Foch’s all out attack on the Hindenburg line (the Hundred Days). It saw three British and one French army force the Germans out of their strong defensive line and back to the River Selle.
The battle of the Selle, 17-25 October 1918, saw the British force the Germans out of a new defensive line along the River Selle that they had been forced to take up being forced out of the Hindenburg Line.