 On the night of 3–4 August, "A" Company with a detachment of the 11th Field Company, Royal Canadian Engineers, conducted a raid on an enemy occupied mine.The company succeeded in surrounding the mine despite heavy machine gun fire but the accompanying engineers were unable to demolish the mine shaft.In order to demolish the shaft towers, the sappers had to climb some from the ground and as soon as they did so they became targets for snipers in the bright moonlight.