The fall of Trônes Wood on 14 July, exposed Guillemont to attack and British heavy artillery shells began falling on the village soon after. By 20 July, the shelling had smashed road surfaces and cratered adjacent fields; a super-heavy gun fired a shell into the village every few minutes day and night. Most of the 8th Bavarian Reserve Division, relieved the 123rd Division around Maurepas in shell-hole positions. Reserve Infantry Regiment 104 held Guillemont and Reserve Regiment 13 the trenches in front of Ginchy, which were "destroyed" by the British bombardment. The commander of III Battalion, Reserve Infantry Regiment 104 was cut off, until a counter-attack by the regimental storm-troops reached the headquarters, while some of the British held out until before surrendering when their ammunition ran out. Part of the regiment also counter-attacked towards Waterlot Farm and was stopped by British machine-gun fire.