The Ottoman forces lacked artillery ammunition and field batteries were only able to fire c. 18,000 shells between early May and the first week of June. After the defeat of the counter-attack at Anzac in mid-May, the Ottoman forces ceased frontal assaults. Late in the month, the Ottomans began tunneling around Quinn's Post in the Anzac sector and early in the morning of 29 May, despite Australian counter-mining, detonated a mine and attacked with a battalion from the 14th Regiment. The Australian 15th Battalion was forced back but counter-attacked and recaptured the ground later in the day, before being relieved by New Zealand troops. Operations at Anzac in early June returned to consolidation, minor engagements and skirmishing with grenades and sniper-fire.