On 4 October , preceded by an artillery barrage beginning at 6:00am , the division began its offensive with the infantry advancing behind a creeping barrage , which caught a mass of German troops , preparing for their own attack , out in the open .
On 4 October , preceded by an artillery barrage beginning at 06:00 , the division began its offensive with the infantry of 4 Brigade advancing behind a creeping barrage . 
 This barrage caught massed German troops , preparing for their own attack , out in the open .