The 2/4th Commando Squadron was one of 12 independent companies and commando squadrons raised by the Australian Army during the Second World War. Raised in August 1941, it was disbanded not long after due to conceptual problems, but it was quickly reformed following the entry of Japan into the war in December 1941. After a period of about six months performing garrison duties in northern Australia, the 2/4th was deployed to Portuguese Timor to reinforce the other Australian units already waging a guerilla war on the island. After a brief campaign the 2/4th was returned to Australia and from there it went on to serve in New Guinea in 1943, taking part in the Salamaua-Lae campaign attached to the 9th Division. Later, the squadron was involved in one of the last campaigns of the war when it landed on Tarakan Island in May 1945 and took part in the Borneo campaign. Following the end of hostilities, the 2/4th returned to Australia and was disbanded at Ingleburn, New South Wales, on 8 January 1946.

The name commando has been applied to a variety of Australian special forces and light infantry units that have been formed since 1941–42. The first Australian "commando" units were formed during the Second World War, where they mainly performed reconnaissance and long-range patrol roles during Australia's campaigns in New Guinea and Borneo, although other units such as M and Z Special Units performed more clandestine roles. These units were disbanded following the end of the war; however, in the 1950s it was realised that there was a need for such units again in the Australian forces. Today, the Australian Army possesses a number of units that perform more conventional direct-action type commando roles, as well as counter-terrorism response, long-range patrolling, and clandestine deep-penetration operations.