24 Military Units in Western Australia

The 10th Light Horse Regiment is a "light cavalry" regiment of the Australian Army Reserve, raised in Western Australia (WA).

The 13th Brigade is an Army Reserve formation of the Australian Army. Originally formed in 1912 as a Militia formation in Victoria, the brigade was re-raised as a First Australian Imperial Force unit during World War I and fought on the Western Front. In the interwar years, the brigade was re-raised as a part-time formation based in Western Australia and later fought in the New Britain Campaign during World War II. It is currently headquartered at Perth in Western Australia and has units located across the state in locations such as Geraldton, Kalgoorlie, Albany, Katanning, Joondalup and Rockingham. The current brigade was formed in 1988 and is tasked with the protection of Western Australia. It forms part of the 2nd Division of the Australian Army.

The 16th Battalion, Royal Western Australia Regiment is an Australian Army reserve infantry battalion located in Western Australia and one of the two battalions of the Royal Western Australia Regiment. The battalion was first formed during the First World War, during which it fought during the Gallipoli Campaign and on the Western Front in France and Belgium as part of the Australian Imperial Force. It was re-formed as a part-time unit in Western Australia during the inter-war years, and served in the New Britain Campaign against the Japanese during the Second World War. In the post war years, the battalion became part of the Royal Western Australia Regiment and currently forms part of the 13th Brigade.

HMAS Arunta is an Anzac-class frigate of the Royal Australian Navy (RAN). The ship, named for the Arrernte people, was laid down in 1995 and commissioned in 1998. Since entering service, Arunta has performed a wide range of duties, including border protection patrols in northern Australian waters, and several deployments to the Persian Gulf.

HMAS Ballarat is an Anzac-class frigate of the Royal Australian Navy (RAN). The frigate was laid down in 2000 and commissioned into the RAN in mid-2004. Since entering service, Ballarat has been involved in border protection as part of Operation Relex II, was deployed to the Gulf for Operation Catalyst, and was one of the two ships involved in the Operation Northern Trident 2009 round-the-world voyage. Ballarat has undergone the Anti-Ship Missile Defence (ASMD) upgrade, completing in 2015.

The Clearance Diving Branch is the specialist diving unit of the Royal Australian Navy (RAN) whose versatile role covers all spheres of military diving, and includes explosive ordnance disposal and maritime counter-terrorism. The Branch has evolved from traditional maritime diving, and explosive ordnance disposal, to include a special operations focus.

HMAS Collins is the lead vessel of the six-submarine Collins class operated by the Royal Australian Navy (RAN).

HMAS Dechaineux is the fourth of six Collins class submarines operated by the Royal Australian Navy (RAN).

HMAS Farncomb is the second of six Collins class submarines operated by the Royal Australian Navy (RAN). Named for Rear Admiral Harold Farncomb, the submarine was laid down in 1993 and launched in December 1995—the first submarine to be completely constructed in Australia. A combination of factors led to Farncomb being the only vessel of her class in operational condition in mid-2009.

No. 2 Flying Training School is the main flying training school of the Royal Australian Air Force (RAAF). Formed under its present name in 1969, it is located at RAAF Base Pearce, Western Australia. The unit operates a fleet of Pilatus PC-21 turboprop trainers. No. 2 FTS traces its origins to the post-war re-establishment of the Air Force's original cadet training unit, No. 1 Flying Training School, at RAAF Point Cook, Victoria, in 1947. Following reorganisation of aircrew training in 1951–52, No. 1 FTS was renamed No. 1 Applied Flying Training School, and began specialising in advanced flight instruction on CAC Wirraways. It relocated to RAAF Base Pearce in 1958, where it converted to De Havilland Vampire jet trainers. In January 1969, the school was reformed as No. 2 FTS, having the previous year begun replacing the Vampires with Macchi MB-326Hs. The Macchis were themselves replaced by the PC-9 beginning in 1989.

No. 25 Squadron is a general reserve squadron of the Royal Australian Air Force (RAAF). It is based at RAAF Base Pearce in Perth, Western Australia, and forms part of the Combat Reserve Wing. The squadron was formed in early 1937 and until early 1939 was designated as "No. 23 Squadron". During World War II, it provided local air defence for the Perth region, before undertaking Army co-operation duties in 1943–1944 and then converting to the heavy bomber role in 1945. In the heavy bomber role, the squadron took part in operations against Japanese targets in the Netherlands East Indies and supported Allied ground operations during the Borneo Campaign.

No. 79 Squadron is a Royal Australian Air Force (RAAF) flight training unit that has been formed on four occasions since 1943. The squadron was established in May 1943 as a fighter unit equipped with Supermarine Spitfires, and subsequently saw combat in the South West Pacific theatre of World War II. Between June 1943 and the end of the war in August 1945 it flew air defence patrols to protect Allied bases and ships, escorted Australian and United States aircraft, and attacked Japanese positions. The squadron was disbanded in November 1945, but was re-formed between 1962 and 1968 to operate CAC Sabres from Ubon Air Base in Thailand. In this role it contributed to the defence of Thailand against a feared attack from its neighbouring states and exercised with United States Air Force units. No. 79 Squadron was active again at RAAF Base Butterworth in Malaysia between 1986 and 1988 where it operated Mirage III fighters and a single DHC-4 Caribou transport during the period in which the RAAF's fighter squadrons were transitioning to new aircraft.

No. 453 Squadron is an air traffic control unit of the Royal Australian Air Force. It was established at Bankstown, New South Wales, in 1941 as a fighter squadron, in accordance with Article XV of the Empire Air Training Scheme for overseas service with the Royal Air Force during World War II. No. 453 Squadron saw combat first in the Malayan and Singapore campaigns of 1941–42. Severe aircraft losses effectively destroyed the squadron and it was disbanded in March 1942. A successor unit by the same name was raised in Britain from mid-1942, to take part in fighting against Nazi Germany in Europe until 1945. The squadron was disbanded in 1946. It was re-formed in its current role in 2011.

HMAS Perth is an Anzac-class frigate of the Royal Australian Navy (RAN). The last ship of the class to be completed, she was built by Tenix Defence Systems and commissioned into the RAN in 2006. In 2007, Perth became the first major warship of the RAN to be commanded by a woman. During 2010 and 2011, the frigate was used as the testbed for a major upgrade to the Anzac class' ability to defend themselves from anti-ship missiles.

The Pilbara Regiment is an infantry regiment of the Australian Army Reserve and is one of three Regional Force Surveillance Units employed in surveillance and reconnaissance of the remote areas of northern Australia. Most elements of the regiment are stationed in Pilbara region of north-west Australia.

HMAS Rankin is the sixth and final submarine of the Collins class, which are operated by the Royal Australian Navy (RAN). Named for Lieutenant Commander Robert William Rankin, the boat was laid down in 1995, and commissioned into the RAN in March 2003, following major delays.

The Royal Australian Navy Submarine Service is the collective name of the submarine element of the Royal Australian Navy. The service currently forms the Navy's Submarine Force Element Group (FEG) and consists of six Collins class submarines.

The Royal Western Australia Regiment is a reserve infantry regiment of the Australian Army consisting of two battalions, the 11th/28th Battalion and the 16th Battalion. The regiment was raised in July 1960 as part of the reorganisation of the Australian Army Reserve through the amalgamation of the three existing infantry regiments in Western Australia:The City of Perth Regiment The Cameron Highlanders of Western Australia The Swan Regiment

HMAS Sheean is the fifth of six Collins-class submarines operated by the Royal Australian Navy (RAN).

HMAS Sirius is a commercial tanker purchased by the Royal Australian Navy and converted into a fleet replenishment vessel to replace HMAS Westralia. She is named in honor of HMS Sirius of the First Fleet. Launched in South Korea on 2004, and converted in Western Australia, Sirius was commissioned in 2006; three years before a purpose-built vessel would have been built, and at half the cost. The tanker is expected to remain in service until the 2020s.

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.

HMAS Stuart is an Anzac-class frigate of the Royal Australian Navy (RAN). She was built at Williamstown in Victoria, and commissioned into the RAN in 2002. The frigate is operational as of 2016.

HMAS Toowoomba is the seventh Anzac-class frigate of the Royal Australian Navy (RAN). She was laid down in 2002 by Tenix Defence Systems and commissioned in 2005.

HMAS Waller is the third of six Collins-class submarines operated by the Royal Australian Navy (RAN).