The 28th Battalion was an infantry battalion of the Australian Army. It was raised in early 1915 as part of the First Australian Imperial Force for service during the First World War and formed part of the 7th Brigade, attached to the 2nd Division. It fought during the final stages of the Gallipoli campaign in late 1915 and then on the Western Front between 1916 and 1918. At the end of the war, the 28th was disbanded in 1919 but was re-raised in 1921, as a part-time unit based in Western Australia. During the Second World War, the 28th undertook defensive duties in Australia for the majority of the conflict, before seeing action against the Japanese in the New Britain campaign in 1944–1945. The battalion was disbanded in March 1946 but was re-formed in 1948 as an amalgamated unit with the 16th Battalion, before being unlinked in 1952 and re-raised as a full battalion following the reintroduction of national service. It remained on the Australian Army's order of battle until 1960 when it was subsumed into the Royal Western Australia Regiment, but was later re-raised in 1966 as a remote area infantry battalion. In 1977, the 28th was reduced to an independent rifle company, and in 1987 was amalgamated into the 11th/28th Battalion, Royal Western Australia Regiment.

7th Brigade is a combined arms formation or brigade of the Australian Army. The brigade was first raised in 1912 as a Militia formation, although it was re-formed as part of the First Australian Imperial Force in early 1915 for service during World War I. It subsequently saw action at Gallipoli and on the Western Front during the war. Following the end of the war the brigade was disbanded in 1919 before being re-raised in 1921 as part of the Citizens Force. During World War II the brigade took part in the fighting against the Japanese in New Guinea and on Bougainville. Today, the 7th Brigade is part of 1st (Australian) Division and is based in Brisbane, Queensland and is composed mainly of units of the Regular Army. While the brigade has not deployed as a whole unit since World War II, component units have deployed on operations to East Timor, the Solomon Islands, Iraq and Afghanistan.