Division, the brigade consisted of four infantry battalions—the 9th, 10th, 11th and 12th Battalions— which were drawn from Queensland, South Australia, Western Australia and Tasmania. The brigade was initially commanded by a British regular officer, Colonel Ewen Sinclair-Maclagan. After being deployed to Egypt where they undertook further training, the brigade was committed to the fighting in the Gallipoli campaign, being the first Australian unit to land at Anzac Cove on 25 April 1915. They subsequently remained on the peninsula until the end of the campaign in December 1915, taking part in a number of battles including the landing at Suvla Bay and the fighting at Lone Pine and Sari Bair. Following the conclusion of the campaign the brigade was withdrawn and returned to Egypt where a period of reorganisation was undertaken. During this time the AIF was expanded by raising new infantry battalions from cadre personnel drawn from experienced units and bringing in newly trained recruits from Australia. Personnel from the 3rd Brigade were used to raise the 13th Brigade, 4th Division. Following this, the decision was made to transfer the AIF to Europe to take part in the fighting along the Western Front. In March 1916 the 3rd Brigade, along with the rest of the I Anzac Corps embarked from Egypt bound for France. On 23 July 1916, the brigade took part in its first major battle when it was committed to the fighting on the Somme at Pozières, where the Australian 1st Division advanced , capturing the village. In December 1916, Sinclair-MacLagan handed over command to Brigadier General Gordon Bennett, who led the brigade for the rest of the war. Later, throughout 1917 and 1918 battles were fought Bullecourt, Ypres, Menin Road, Passchendale, Hazebrouck, Amiens and along the Hindenburg Line before the fighting came to an end in November 1918. Interwar and World War II Following the war, the 3rd Brigade was disbanded in 1919, however the brigade was later re-raised as part the Citizens Force (which later became known as the Militia). Initially the brigade was based in Brisbane, Queensland, however, in 1921, following a reorganisation of the Australia's part-time military forces, later the brigade was re-allocated to the 4th Division and, consisting of the 10th, 27th, 43rd and 50th Battalions, it was headquartered in Adelaide, South Australia. In September 1939, following the outbreak of World War II, the Australian government decided to raise an all volunteer