The 48th Battalion was an infantry battalion of the Australian Army. It was originally raised in 1916 for service during World War I and took part in the fighting in the trenches of the Western Front in France and Belgium, before being disbanded in early 1919. After the war, the battalion was re-raised as a part-time unit based initially in Victoria and later in South Australia. In 1930 it was amalgamated with the 43rd Battalion and remained so until late 1939, subsequently being linked with the 10th Battalion in 1942. The battalion did not see combat during World War II, and after the war was re-raised as an amalgamated unit, again with the 43rd Battalion, in 1952. They remained linked until 1960 when the 43rd/48th Battalion was subsumed by the Royal South Australia Regiment.

The 52nd Battalion was an infantry battalion of the Australian Army. It was originally raised in 1916 as part of the Australian Imperial Force for service during World War I. After training in Egypt, the battalion took part in the fighting in the trenches of the Western Front in France and Belgium, including major battles at Mouquet Farm, Messines, Polygon Wood, Dernancourt and Villers-Bretonneux. In May 1918, the battalion was disbanded to provide reinforcements for other depleted Australian units. After the war, the battalion was re-raised as a part-time unit in Victoria in 1921 and served until 1930 when it was amalgamated with the 37th Battalion to become the 37th/52nd Battalion. In 1936, the battalion was re-formed and during the early part of World War II it undertook garrison duties in Australia before being merged once again with the 37th Battalion in 1942.