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 First Battle of Dernancourt was fought on 28 March 1918 near Dernancourt in northern France during World War I. It involved a force of the German 2nd Army attacking elements of the VII Corps, which included British and Australian troops, and resulted in a complete defeat of the German assault.