Battle Of Festubert
The Battle of Festubert was an attack by the British army in the Artois region of France on the western front during World War I. It began on May 15, 1915 and continued until May 25.
The Second Battle of Artois, of which the British contribution was the Battle of Aubers Ridge, was a battle on the Western Front of World War I, it was fought at the same time as the Second Battle of Ypres. Even though the French under General Philippe Pétain gained some initial victories, the battle ended in what was largely a stalemate. This was the final allied offensive of the spring of 1915, followed by a lull in the fighting until September 1915 which saw the Second Battle of Champagne and the Third Battle of Artois.
Wikipedia: Battle Of Festubert
Wikipedia: World War I