 Complete the following phrase:  Raised as an Australian Imperial Force AIF battalion in March 1915 as part of the 5th Brigade of the 2nd Division, the 18th Battalion was formed at Liverpool, New South Wales. Following training, the battalion was sent to Egypt, and from there to Gallipoli in August 1915 as part of a wave of reinforcements that arrived after the initial landing. There it participated in the costly August Offensive, during which it was sent to Damakjelik Bair. From there, they played a mainly defensive role in the campaign, apart from playing a minor role in the 