The Battle of Thiepval Ridge was the first large offensive mounted by the Reserve Army (Lieutenant General Hubert Gough), during the Battle of the Somme on the Western Front during the First World War. The attack was intended to benefit from the Fourth Army attack in the Battle of Morval, by starting 24 hours afterwards. The battle was fought on a front from Courcelette in the east, near the Albert–Bapaume road to Thiepval and the Schwaben Redoubt (Schwaben-Feste) in the west, which overlooked the German defences further north in the Ancre valley, the rising ground towards Beaumont-Hamel and Serre beyond. Thiepval Ridge was well fortified and the German defenders fought with great determination, while the British co-ordination of infantry and artillery declined after the first day, due to