The Attack on the Gommecourt Salient was a British operation against the northern flank of the German 2nd Army that took place on 1 July 1916, on the Western Front in France, during the First World War. The attack was conducted by the British Third Army (Lieutenant-General Edmund Allenby) as a diversion, to protect the northern flank of the main attack by the British Fourth Army on the first day on the Somme, from Serre southward to the boundary with the French Sixth Army at Maricourt. To extend the attack front of the Fourth Army, the VII Corps (Lieutenant-General Thomas Snow) of the Third Army was to capture the Gommecourt Salient, the most westerly point of the Western Front.
In the first week of May, the 56th (1/1st London) Division (Major-General Charles Hull) and the 46th (North Midland) Division (Major-General Edward Montagu-Stuart-Wortley) moved into the area for the attack. By 10 May, both divisions had taken over the front on the right flank of the 37th Division (Major-General A. Edward W. Count Gleichen) and begun training for the operation, making no attempt to conceal the preparations.
At 7:30 a.m. on 1 July, the attack on Gommecourt began and the 56th (1st London) Division to the south, overran the first two German trenches. Troops also reached the third trench, but a strongpoint at Nameless Farm held out despite several attacks. The German artillery fired a standing barrage along no man's land and trapped the British on the far side all day as German infantry gradually recaptured the lost trenches, all attempts to send reinforcements from the British lines being costly failures.
The 46th Division attack on the north side of the salient had even less success, a smoke screen leading the attackers to lose direction as their advance was slowed by deep mud. Some parties of the 137th Brigade got into the German front line and parties of the 139th Brigade reached the second line but German small arms and barrage-fire on no man's land, trapped the attackers and isolated them from their supports.
The parties who got across no man's land were surrounded and destroyed; a few men being taken prisoner. The 46th (North Midland) Division had the fewest casualties of the 13 British divisions which attacked on 1 July. After several local truces, the British wounded were gathered in.