1–18 October — Battle of Le Transloy Ridge
October 7 - Rain delays further Allied advances, leading to a renewed war of attrition.
As October began, bad weather stymied another Allied attack, with soldiers struggling to cross muddy terrain under fierce fire from German artillery and fighter planes. The Allies made their final advance of the battle in mid-November, attacking the German positions in the Ancre River valley. With the arrival of true winter weather, Haig finally called the offensive to a halt on November 18, ending the battle of attrition on the Somme, at least until the following year. Over 141 days, the British had advanced just seven miles, and had failed to break the German line.