 Complete the following phrase:  In August, the Allies attempted to break the deadlock on the Gallipoli peninsula, launching the August Offensive in an effort to secure the heights around Sari Bair, Chunuk Bair and Baby 700. During this effort, the 8th and 10th Light Horse Regiments took part in the attack at the Nek on 7 August, while the 9th was placed in reserve. Planned as a feint to draw attention away from efforts elsewhere, the attack proved costly for the light horsemen. Due to poor coordination, efforts to support the attack broke down, and the preparatory artillery barrage ended before the attack began, allowing the defending Ottoman troops to return to their firing positions before the first wave set out. Attacking across the narrow front, the first wave of 150 men were all killed or wounded shortly after leaving their trenches. Nevertheless, three more waves were pushed forward before the attack was halted. Total casualties in the two regiments amounted 234 killed and 138 wounded. On 27 August, the 9th and 10th Light Horse Regiments were sent as reinforcements to support the 