 Complete the following phrase:  When World War I began, due to the provisions of the Defence Act 1903 which precluded sending conscripts overseas to fight, it became necessary to raise an all volunteer force, separate to the militia, for service in the Middle East and Europe. This force was known as the Australian Imperial Force AIF. As a part of this, the 17th Battalion was raised in March 1915 in Liverpool, New South Wales, forming part of the 5th Brigade, which was assigned to the 2nd Division. In May 1915, the battalion left Australia and after spending some time in Egypt training, they landed at Anzac Cove on 20 August 1915. They took part in the August Offensive, during which time they were engaged in the attack on 