 Complete the following phrase:  On 28 January 1915, Leak enlisted in Rockhampton as a private in the Australian Imperial Force AIF and was assigned to the fifth reinforcement draft for the 9th Battalion, 3rd Brigade, 1st Division. On 16 April, he embarked from Brisbane, Queensland, on board the transport Kyarra. He joined his battalion on 22 June while it was involved in trench warfare defending the Anzac Cove beachhead on the Gallipoli Peninsula in the Ottoman Empire. This fighting was part of the Gallipoli Campaign. Six days after Leaks arrival, the 9th Battalion was involved in a two-pronged attack against the Ottoman positions on what were known as Snipers Ridge and Knife Edge, close to Lone Pine. The attack was abortive, and resulted in the battalion suffering casualties of 37 killed and 62 wounded. Leak was with his battalion during the fruitless 