 The commanding officer of one of the assaulting battalions requested that the artillery leave a portion of German trench undamaged.Machine gun nests in the undamaged sections of the German line pinned down, wounded, or killed much of the 4th Canadian Division's right flank.The progress on the left flank was eventually impeded by harassing fire from the Pimple that was made worse when the creeping barrage got too far ahead of the advancing troops.