 Complete the following phrase:  During the First World War, the brigade was re-constituted as part of the Australian Imperial Force, as part of the 1st Division. Made up of four battalions that were raised from volunteers for overseas service from Victoria, each consisting of 1,023 men5th, 6th, 7th and 8th Battalionsand initially under the command of Colonel James Whiteside McCay, and was among the first Australian formations to be sent overseas. As part of the 1st Division, after initial training, it was sent to Egypt, where they took part in the defence of the Suez Canal in the wake of the First Suez Offensive before taking part in the 