The 10th Battalion was an infantry battalion of the Australian Army that served as part of the all-volunteer Australian Imperial Force during World War I. Among the first units raised in Australia during the war, the battalion was recruited from South Australia in August 1914 and formed part of the 3rd Brigade, 1st Division. After basic training, the battalion embarked for Egypt where further training was undertaken until the battalion was committed to the Gallipoli campaign. During the landing at Anzac Cove, it came ashore as part of the initial covering force. Members of the 10th Battalion penetrated the furthest inland of any Australian troops during the initial fighting, before the Allied advance inland was checked. After this, the battalion helped defend the beachhead against a heavy counter-attack in May, before joining the failed August Offensive. Casualties were heavy throughout the campaign and in November 1915, the surviving members were withdrawn from the peninsula. In early 1916, the battalion was reorganised in Egypt at which time it provided a cadre staff to the newly formed 50th Battalion. It was transferred to the Western Front in March 1916, and for the next two-and-a-half years took part in trench warfare in France and Belgium until the Armistice in 1918. The last detachment of men from the 10th Battalion returned to Australia in September 1919.

The 3rd Brigade is a combined arms brigade of the Australian Army, principally made up of the 1st and 3rd Battalions of the Royal Australian Regiment. Initially raised in 1903 as part of the post-Federation Australian Army, it was removed from the order of battle in 1906 following the restructure of the field force. It was re-formed in 1914 for service during World War I, taking part in the fighting at Gallipoli and on the Western Front in Europe. During World War II the brigade was used in a defensive role before it was disbanded in 1944. It was re-raised in 1967 for service during the Vietnam War and later went on to provide the nucleus of the deployment to East Timor during the Australian-led intervention in 1999. The brigade is currently based at Lavarack Barracks in Townsville, Queensland.