The 6th Battalion was an infantry battalion of the Australian Army. Originally formed in 1914 for service during the First World War, the battalion fought at Gallipoli and on the Western Front. The battalion was disbanded in 1919 but was re-raised in 1921 as part of the Citizens Force, and adopted the title of "Royal Melbourne Regiment" in 1935. The battalion did not serve overseas during the Second World War and was eventually disbanded in 1944. It was re-raised in 1948 and remained in existence until 1960 when it was absorbed into the Royal Victoria Regiment. Today its honours and traditions are maintained by the 5th/6th Battalion, Royal Victoria Regiment.

The Australian Army Reserve is a collective name given to the reserve units of the Australian Army. Since the Federation of Australia in 1901, the reserve military force has been known by many names, including the Citizens Forces, the Citizen Military Forces, the Militia and, unofficially, the Australian Military Forces. In 1980, however, the current name—Australian Army Reserve—was officially adopted, and it now consists of a number of components based around the level of commitment and training obligation that its members are required to meet.