The battle of Aubers Ridge was a British contribution to the Allied spring offensive of 1915. It was fought over the same ground as the battle of Neuve Chapelle, 10-13 March 1915, but failed to achieve even the temporary successes of that battle.
The British attack was to be launched by General Sir Douglas Haig’s First Army. It was intended to send in two attacks, to the north and south of Neuve Chapelle, with the hope that the two attacking forces could meet up behind the German front lines. Haig had requested extra artillery to increase the strength of the 40 minute bombardment planned for the morning of 9 May, but all available artillery reserves had been sucked into the fighting at the second battle of Ypres, still raging just to the north.
The British attack on 9 May was a total failure. The Germans had greatly strengthened their lines around Neuve Chapelle after they had been overrun during Neuve Chapelle, and the British artillery bombardment was simply not heavy enough to destroy the new German lines.
The battle of Aubers Ridge fits the popular image of a First World War battle better than most. The British troops went over the top early on the morning of 9 May and were cut down by German machine gun fire. The survivors were pinned down in no mans land. No significant progress was made, and early on 10 May Haig ended the offensive. The British suffered 11,000 casualties in one day of fighting on a narrow front.