The 4th Brigade is a brigade-level formation of the Australian Army. Originally formed in 1912 as a Militia formation, the brigade was re-raised for service during World War I, elements of the brigade served at Gallipoli and in the trenches on the Western Front before being disbanded in 1919. In 1921, the brigade was re-raised as a unit of Australia's part-time military forces, based in the state of Victoria. During World War II the brigade served in the New Guinea and New Britain campaigns. Following the war, the brigade formed part of the 3rd Division, however, it was later reallocated to the 2nd Division, where it serves as a Reserve combined-arms formation including units and personnel from all corps of the Army including armoured, infantry, artillery, engineers, signals and ordnance. History The 4th Brigade traces its origins to 1912, when it was formed as a Militia brigade as part of the introduction of the compulsory training scheme, assigned to the 2nd Military District. At this time, the brigade's constituent units were located around regional New South Wales including Armidale, Inverell, Tamworth, Maitland, Newcastle and Adamstown. World War I In September 1914, the brigade was re-raised as part of the Australian Imperial Force (AIF), which was an all-volunteer force that was raised for service during World War I shortly after the outbreak of the war. Under the command of Colonel (later General Sir) John Monash, at that time the brigade consisted of four infantry battalions which were raised from all Australian states: the 13th (NSW), 14th (Vic), 15th (Qld/Tas) and 16th Battalions (SA/WA). Following initial training at Broadmeadows in Victoria, they embarked for overseas in the second wave of Australian forces to be dispatched, leaving in December 1914. They arrived in Egypt in early 1915, where they were assigned to the New Zealand and Australian Division. In April 1915, the brigade participated in the ANZAC landing at Gallipoli, arriving on the second day as the division's reserve, before joining the eight-month campaign that followed. During the August Offensive, the brigade attacked Hill 971 and then, later, Hill 60. In December 1915 the decision was made to evacuate Gallipoli and subsequently the brigade was transported back to Egypt. Following this, the AIF underwent a period of reorganisation and expansion. As a part of this process, the 4th Brigade provided a cadre of experienced personnel to the newly formed 12th Brigade. At the