rench Sixth Army front, until 5 November. Next day the Fourth Army ceased offensive operations, except for small attacks intended to improve positions and divert German attention from attacks being made by the Reserve/Fifth Army. Larger operations resumed in January 1917.
Battle of Thiepval Ridge, 26–28 September
The Battle of Thiepval Ridge was the first large offensive mounted by the Reserve Army of Lieutenant General Hubert Gough and was intended to benefit from the Fourth Army attack at Morval by starting 24 hours afterwards. 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 confused fighting in the maze of trenches, dug-outs and shell-craters. The final British objectives were not reached until the Battle of the Ancre Heights (1 October – 11 November). Organisational difficulties and deteriorating weather frustrated Joffre's intention to proceed by vigorous co-ordinated attacks by the Anglo-French armies, which became disjointed and declined in effectiveness during late September, at the same time as a revival occurred in the German defence. The British experimented with new techniques in gas warfare, machine-gun bombardment and tank–infantry co-operation, as the Germans struggled to withstand the preponderance of men and material fielded by the Anglo-French, despite reorganisation and substantial reinforcements of troops, artillery and aircraft from Verdun. September became the worst month for casualties for the Germans.
Battle of the Ancre Heights, 1 October – 11 November
The Battle of the Ancre Heights was fought after Haig made plans for the Third Army to take the area east of Gommecourt, the Reserve Army to attack north from Thiepval Ridge and east from Beaumont Hamel–Hébuterne and for the Fourth Army to reach the Péronne–Bapaume road around Le Transloy and Beaulencourt–Thilloy–Loupart Wood, north of the Albert–Bapaume road. The Reserve Army attacked to complete the capture of Regina Trench/Stuff Trench, north of Courcelette to the west end of Bazentin Ridge around Schwaben and Stuff Redoubts, during which bad weather caused great hardship and delay. The Marine Brigade from Flanders and fresh German divisions brought from quiet fronts counter-attacked frequently and the British objectives were not secured until 11 November.
Battle of the Ancre, 13–18 November
The Battle of the Ancre was the last big British operation of the year. The Fifth (formerly Reserve) Army attacked into the Ancre valley to exploit German exhaustion after the Battle of the Ancre Heights and gain ground ready for a resumption of the offensive in 1917. Political calculation, concern for Allied morale and Joffre's pressure for a continuation of attacks in France, to prevent German troop transfers to Russia and Italy also influenced Haig. The battle began with another mine being detonated beneath Hawthorn Ridge Redoubt. The attack on Serre failed, although a brigade of the 31st Division, which had attacked in the disaster of 1 July, took its objectives before being withdrawn later. South of Serre, Beaumont Hamel and Beaucourt-sur-l'Ancre were captured. South of the Ancre, St. Pierre Division was captured, the outskirts of Grandcourt reached and the Canadian 4th Division captured Regina Trench north of Courcelette, then took Desire Support Trench on 18 November. Until January 1917 a lull occurred, as both sides concentrated on enduring the weather.
At the start of 1916, most of the British Army had been an inexperienced and patchily trained mass of volunteers. The Somme was the debut of the Kitchener Army created by Lord Kitchener's call for recruits at the start of the war. The British volunteers were often the fittest, most enthusiastic and best educated citizens but British casualties were also inexperienced soldiers and it has been claimed that their loss was of lesser military significance than the losses of the remaining peace-trained officers and men of the German army. British casualties on the first 