The 1st Armoured Personnel Carrier Squadron was an armoured unit of the Australian Army raised for service during the Vietnam War. Raised in 1965, the unit was deployed to South Vietnam in May 1966 to join the 1st Australian Task Force. After that 1 APC Sqn was involved in numerous operations in support of the 5th and 6th Battalions, the Royal Australian Regiment, with the most notable action coming on 18 August 1966 when the squadron was involved in the Battle of Long Tan. In January 1967, 1 APC Sqn was redesignated as 'A' Squadron, 3rd Cavalry Regiment.

1st Armoured Regiment is an armoured regiment of the Australian Army and is the senior regiment of the Royal Australian Armoured Corps. Formed as a tank unit in the new Australian Regular Army on 7 July 1949, the regiment subsequently saw service during the Vietnam War operating Centurion tanks. Currently the unit is based in Edinburgh, South Australia as part of the 1st Brigade. As part of the Plan Beersheba reorganisation, the unit has become one of three Armoured Cavalry Regiments (ACRs) assigned to the Army's multirole combat brigades in Brisbane, Darwin and Townsville. Each ACR is equipped with M1A1 tanks and ASLAV light armoured vehicles.

1st Battalion, Royal Australian Regiment is a regular motorised infantry battalion of the Australian Army. 1 RAR was first formed as the 65th Australian Infantry Battalion of the 34th Brigade (Australia) on Balikpapan in 1945 and since then has been deployed on active service during the Korean War, the Malayan Emergency, the Vietnam War, Unified Task Force in Somalia, East Timor, Iraq War and Afghanistan. Additionally, the battalion has deployed on peacekeeping and other operations to a number of countries including Japan, Rifle Company Butterworth, Timor Leste, Solomon Islands, Tonga and the Philippines. In 2021, 1 RAR remains one of the Australian Army's most heavily deployed units sending individuals and detachments to domestic, regional and other enduring operations. The battalion is currently based in Coral Lines at Lavarack Barracks, Townsville, Queensland, where it forms part of the 3rd Brigade.

The 1st Regiment, Royal Australian Artillery is a close support regiment attached to the 7th Brigade at Enoggera Barracks in Queensland. The unit was formed in 1914 under the name 1st Australian Field Artillery Brigade, part of 1st Division Artillery during World War I and later served in World War II and the Vietnam War. It is currently re-equipping with M777A2 lightweight towed howitzers.

No. 2 Squadron is a Royal Australian Air Force (RAAF) squadron that operates from RAAF Base Williamtown, near Newcastle, New South Wales. From its formation in 1916 as part of the Australian Flying Corps, it has flown a variety of aircraft types including fighters, bombers, and Airborne Early Warning & Control (AEW&C). During World War I, the squadron operated on the Western Front conducting fighter sweeps and ground-attack missions. It was disbanded in mid-1919, following the end of hostilities. The squadron was briefly re-raised in 1922 as part of the newly independent RAAF, but was disbanded after only a couple of months and not reformed until 1937. It saw action as a bomber unit in the South West Pacific theatre of World War II and, equipped with English Electric Canberra jets, in the Malayan Emergency and the Vietnam War. The squadron was again disbanded in 1982, following the retirement of the Canberra. It was re-formed in 2000 to operate the Boeing 737 AEW&C "Wedgetail". One of the six Boeing 737s was deployed to the Middle East in September 2014, as part of Australia's contribution to the military coalition against ISIS.

The 2nd Battalion, Royal Australian Regiment is an amphibious light infantry battalion of the Australian Army part of the 1st Division Amphibious Task Group based at Lavarack Barracks in Townsville.

The 3rd Battalion, The Royal Australian Regiment is a mechanised infantry battalion of the Australian Army, based in Kapyong Lines, Townsville as part of the 3rd Brigade. 3 RAR traces its lineage to 1945 and has seen operational service in Japan, Korea, Malaya, Borneo, South Vietnam, Rifle Company Butterworth, East Timor, the Solomon Islands, Afghanistan and Iraq.

The 3rd/4th Cavalry Regiment is an armoured unit within the Australian Army's Royal Australian Armoured Corps. Formed in 1981 with the amalgamation of the 3rd Cavalry Regiment and the 4th Cavalry Regiment, from 1986 to 2014 the unit consisted of an independent squadron, B Squadron 3rd/4th Cavalry Regiment, within the 3rd Brigade in Townsville, Queensland. From 2017, B Squadron 3rd/4th Cavalry Regiment has been the training support and logistics squadron within the School of Armour at Puckapunyal in Victoria.

The 4th Battalion, Royal Australian Regiment was an Australian Army infantry battalion and part of the Royal Australian Regiment. The battalion was formed on 1 February 1964 and was renamed the 2nd Commando Regiment on 19 June 2009.

The 5th Battalion, Royal Australian Regiment is a regular motorised infantry battalion of the Australian Army. Originally established in 1965 it would serve two tours of South Vietnam before it was linked with the 7th Battalion to form the 5th/7th Battalion, Royal Australian Regiment in 1973. In late 2006 the two units were de-linked, and 5 RAR again joined the Australian Army's order of battle in its own right. It has since served in Iraq, East Timor and Afghanistan.

6th Battalion, Royal Australian Regiment is a mechanised infantry battalion of the Australian Army. It was originally raised in Brisbane, Queensland, on 6 June 1965 and has since then served in a number of overseas deployments and conflicts including South Vietnam, East Timor, Iraq and Afghanistan. During the Vietnam War, the battalion earned a US Presidential Unit Citation from the United States when members from 'D' Company participated in the Battle of Long Tan on 18–19 August 1966. The battalion is currently based at Gallipoli Barracks in Brisbane and forms part of the 7th Brigade.

The 7th Battalion, Royal Australian Regiment is a regular infantry battalion of the Australian Army. It was originally raised in 1965 as part of Australia's commitment to the Vietnam War and it eventually served two tours in Vietnam in 1967 and 1971. In 1973, following Australia's withdrawal from the conflict, the battalion was amalgamated with the 5th Battalion, Royal Australian Regiment to form the 5th/7th Battalion, Royal Australian Regiment.

The 8th Battalion, Royal Australian Regiment was an Australian Army Regular infantry battalion. The battalion was formed in July 1966 as part of an expansion of the Australian Army in the mid-1960s due to the perceived threat of Communism in southeast Asia. Initially the battalion was sent to Malaysia in 1967, before later being sent to South Vietnam as part of Australia's commitment to the Vietnam War. Between November 1969 and October 1970 the battalion undertook operations as part of the 1st Australian Task Force, before being brought back to Australia. In October 1973, after Australia's involvement in Vietnam officially ended, the battalion was amalgamated with 9 RAR to form 8/9 RAR.

The 8th Field Ambulance was a medical unit of the Australian Army. It was originally formed for service during World War I as part of the Australian Imperial Force, and served mainly on the Western Front between 1916 and 1918, before disbanding in early 1919. During World War II, the unit was re-raised as a Militia unit and served in Western Australia, New Guinea and Bougainville. During the Vietnam War, the unit served in Vung Tau in support of the 1st Australian Task Force between 1967 and 1968, before being disbanded in 1972. The unit's designation is now perpetuated by one for the 1st Close Health Battalion's close health companies.

No. 9 Squadron was a unit of the Royal Australian Air Force (RAAF). The squadron was formed in early 1939 and saw active service in World War II as a fleet co-operation unit providing aircrews for seaplanes operating off Royal Australian Navy cruisers. It was disbanded in late 1944, but was re-raised in 1962 and later became an Army co-operation unit, flying helicopters in support of Australian troops during the Vietnam War. The squadron was disbanded in 1989 when the RAAF transferred its battlefield helicopters to the Australian Army's aviation regiments.

The 9th Battalion, Royal Australian Regiment was a Regular light infantry battalion of the Australian Army. The battalion was raised in November 1967 and deployed to South Vietnam as part of Australia's commitment to the Vietnam War in November 1968. 9 RAR served a year-long tour of duty based out of Nui Dat conducting operations mainly in Phuoc Tuy Province as part of the 1st Australian Task Force. The Battalion returned to Australia in November 1969 and was reformed at Enoggera, Queensland in January 1970 as part of the 6th Task Force, attached to the 1st Division. On 31 November 1973, following the withdrawal of Australian forces from South Vietnam and subsequent reduction of the Australian Army, the battalion was linked with the 8th Battalion, Royal Australian Regiment to form the 8th/9th Battalion, Royal Australian Regiment.

No. 35 Squadron is a Royal Australian Air Force (RAAF) transport unit. Formed in 1942, No. 35 Squadron operated during World War II, transporting cargo and passengers around Australia, New Guinea and the Netherlands East Indies, equipped with a variety of aircraft including the Douglas Dakota. It was disbanded after the war, but was re-raised in the 1960s for service during the Vietnam War, flying transportation and resupply operations with DHC-4 Caribous in support of Australian and US forces. The squadron was subsequently augmented with rotary-wing aircraft, operating UH-1 Iroquois in both the transportation and gunship roles. In the late 1980s, the squadron returned to a solely fixed-wing transport role. It ceased operations in 2000, but was re-raised in January 2013. It began re-equipping with C-27 Spartan transports in 2015.

The 1st Australian Task Force was a brigade-sized formation which commanded Australian and New Zealand Army units deployed to South Vietnam between 1966 and 1972. 1 ATF was based in a rubber plantation at Nui Dat, 8 kilometres (5.0 mi) north of Ba Ria in Phuoc Tuy Province and consisted of two and later three infantry battalions, with armour, aviation, engineers and artillery support. While the task force was primarily responsible for securing Phuoc Tuy Province, its units, and the Task Force Headquarters itself, occasionally deployed outside its Tactical Area of Responsibility.

The Australian Army Training Team Vietnam (AATTV) was a specialist unit of military advisors of the Australian Army that operated during the Vietnam War. Raised in 1962, the unit was formed solely for service as part of Australia's contribution to the war, providing training and assistance to South Vietnamese forces. Initially numbering only approximately 30 men, the size of the unit grew several times over the following years as the Australian commitment to South Vietnam gradually grew, with the unit's strength peaking at 227 in November 1970. Members of the team worked individually or in small groups, operating throughout the country from the far south to the Demilitarized Zone (DMZ) in the north. Later they were concentrated in Phước Tuy Province as Australian forces prepared to withdraw from Vietnam. It is believed to be the most decorated Australian unit to serve in Vietnam; its members received over 100 decorations, including four Victoria Crosses, during its existence. The unit was withdrawn from Vietnam on 18 December 1972 and was disbanded in Australia on 16 February 1973. A total of 1,009 men served with the unit over a period of ten years, consisting of 998 Australians and 11 New Zealanders.

The Special Air Service Regiment, officially abbreviated SASR though commonly known as the SAS, is a special forces unit of the Australian Army. Formed in 1957, it was modelled on the British SAS sharing the motto, "Who Dares Wins". The regiment is based at Campbell Barracks, in Swanbourne, a suburb of Perth, Western Australia, and is a direct command unit of the Special Operations Command. It has taken part in operations in Borneo, Vietnam, Somalia, East Timor, Iraq and Afghanistan, as well as many other peacekeeping missions. The SASR also provides a counter-terrorist capability, and has been involved in a number of domestic security operations.