 Complete the following phrase:  Following the outbreak of the First World War, the 5th Brigade was re-raised in mid-1915 as part of the Australian Imperial Force AIF from volunteers for overseas service. Upon formation it consisted of four infantry battalionsthe 17th, 18th, 19th and 20th Battalions. Assigned to the 2nd Division, the majority of its personnel were drawn from men that had previously served in New Guinea with the Australian Naval and Military Expeditionary Force. After formation, the brigade departed Australia, embarking for Egypt, in May 1915, and after a period of training, were dispatched to Gallipoli in August as reinforcements for the 1st Division, which had been there since April. The brigade subsequently took part in the 