
Australia's military, known as the Australian Defence Force (ADF), is comprised of the Australian Army, the Royal Australian Navy, and the Royal Australian Air Force. The size of the Australian military has fluctuated over the years due to various factors, including voluntary recruitment and conscription. In 2019, the size of Australia's military was approximately 59,000 personnel, marking a gradual increase from previous years. The Australian military has a long history of involvement in significant global conflicts, including the Second Boer War, World Wars I and II, the Korean War, the Vietnam War, and more recently, the wars in Afghanistan and Iraq.
| Characteristics | Values |
|---|---|
| Military Size in 2019 | 59,000 |
| Military Size in 2018 | 58,100 |
| Military Size in 2017 | 58,000 |
| Military Size in 1914 | 52,561 |
| Military Size in 1939 | 20,000 |
| Military Size in 1950 | 3,000+ |
| Military Size in 1964 | 40,000 |
| Current Military Strength Ranking | 18 of 145 |
| Current Service Members as % of Total Population | 0.4% |
| Service Members Living in New South Wales or Queensland | 56% |
| Previous Service Members Living in New South Wales or Queensland | 54% |
| % of Townsville Residents Serving in ADF | 3.5% |
| % of North Canberra Residents Serving in ADF | 3.1% |
| % of Rockingham Residents Serving in ADF | 2.6% |
| % of Gungahlin Residents Serving in ADF | 2.4% |
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What You'll Learn

The Australian Defence Force (ADF)
The ADF provides unique opportunities and experiences for its members, impacting their lives during and after their service period. It influences various aspects of their lives, such as where they live and their connections with family and social networks. Returning to civilian life after serving in the ADF can pose challenges, and former members may have specific physical and psychological needs that require special attention due to their military background.
The Australian Defence Force is led by the Chief of the Defence Force (CDF), who commands the ADF and oversees the Chief of Army (CA). The CA is responsible for leading the Australian Army and reports directly to the Minister for Defence. The Department of Defence administers both the ADF and the Army.
The Australian Army has participated in numerous conflicts and peacekeeping operations, including the Second Boer War, the First and Second World Wars, and more recent engagements in Afghanistan and Iraq. Since 1947, the Army has been actively involved in peacekeeping missions, often under the United Nations. Today, it continues to engage in multilateral and unilateral military exercises and provides emergency disaster relief and humanitarian aid worldwide.
In terms of manpower, the ADF represents a small proportion of Australia's total population. According to the 2021 Census, current ADF service members accounted for less than 1% (0.4%) of the total Australian population. However, certain areas, such as Townsville, have a higher concentration of ADF members, with 3.5% of its resident population currently serving in the ADF.
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Australian Army history
The Australian Army has a long history dating back to the colonisation of the country. For over 80 years after the establishment of the first British colony in Australia in 1788, the only professional soldiers in the country were members of British regiments. The New South Wales Marine Corps, which came ashore alongside the First Fleet in 1788, was the first modern infantry on the Australian continent.
During this early colonial period, parts of the colonial forces participated in the Australian frontier wars, which were a series of conflicts and massacres against the Indigenous Australian population. One of the most brutal episodes occurred in 1828 when the Governor of Van Diemen's Land declared martial law and initiated the Black War, which lasted until 1832.
By 1870, when the British garrisons were withdrawn, the six separate self-governing colonies in Australia had already established their own part-time reserve units, known as militias or "volunteers". These colonial forces were involved in conflicts such as the New Zealand Wars (1863-1872) and the Mahdist War in Sudan (1883). The latter saw the deployment of the New South Wales Contingent, consisting of an infantry battalion and an artillery battery, marking an early instance of Australian forces serving overseas.
In 1901, following the Federation of Australia, these colonial military forces were amalgamated to form the Commonwealth Military Forces, now known as the Australian Army. One of the first major conflicts involving the newly unified Australian Army was the Second Boer War (1899-1902), in which Australian contingents fought alongside British forces.
During World War I (1914-1918), the Australian Army raised the all-volunteer First Australian Imperial Force (AIF), which saw over 52,000 recruits initially. The AIF played a significant role in campaigns across the globe, including in Egypt, where the Australian and New Zealand Army Corps (ANZAC) was formed.
In World War II (1939-1945), the Australian Army raised the Second Australian Imperial Force, a 20,000-strong volunteer force that initially consisted of the 6th Division and later expanded to include the 7th, 8th, and 9th Divisions. The Australian territory came under direct attack during this conflict, the only time this has occurred in the country's history.
Post-World War II, the Australian Army continued to be involved in international conflicts, including the occupation of Japan, the Korean War, the Malayan Emergency, the Vietnam War, and more recently, the wars in Afghanistan and Iraq. The Army has also participated in peacekeeping operations, provided emergency disaster relief, and contributed to multilateral military exercises.
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First World War
Australia's military during the First World War was comprised of the Australian Army, the Royal Australian Navy (RAN), the Australian Flying Corps, and the Australian Naval and Military Expeditionary Force (AN&MEF). The Australian Army was the largest service in the Australian military during this conflict.
The First Australian Imperial Force (AIF), formed on 15 August 1914, was the main expeditionary force of the Australian Army, initially consisting of 20,000 men. The AIF included the infantry, light horse brigades, artillery, medical corps, and engineers. The infantry battalions and light horse regiments recruited men from their own states, while specialty units like the artillery drew personnel from across Australia. The AIF saw significant action in Egypt, France, Britain, and the Middle East, suffering approximately 210,000 casualties, including 61,519 killed or died of wounds.
The AN&MEF, a separate force of 2,000 men, was dispatched to German New Guinea in September 1914, where it seized German possessions and obtained the surrender of the German garrison. The AN&MEF also provided occupation forces for the duration of the war.
The Royal Australian Navy was placed under the command of the British Admiralty at the outbreak of the war. The first major RAN victory occurred on 9 November 1914, when the HMAS Sydney sank the German light cruiser SMS Emden off the Cocos Islands. The RAN played a crucial role in providing naval cover for the landings at Gallipoli, but suffered losses, including the disappearance of the submarine AE1 with 35 personnel on 14 September 1914.
The Australian Flying Corps was formed in July 1914, with the Central Flying School established at Point Cook, Victoria, in 1913.
During the First World War, over 416,800 Australians served in the military, representing about 38.7% of the male population aged 18 to 44. Of these, an estimated 58,961 died, 166,811 were wounded, 4,098 went missing or were taken prisoner, and 87,865 fell sick. The high casualty rate of about 65% was among the highest in the British Empire forces.
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Second World War
On 3 September 1939, Australian Prime Minister Robert Menzies announced the beginning of Australia's involvement in World War II. Almost a million Australians, including both men and women, served in the armed forces during the war. They fought in campaigns against Germany and Italy in Europe, the Mediterranean and North Africa, and against Japan in Southeast Asia and other parts of the Pacific.
Prior to the war, the Australian Army consisted of the small full-time Permanent Military Forces (PMF) and the larger part-time Militia. In 1938, there were only 35,000 soldiers in the Militia, but by September 1939, this number had increased to 80,000, along with a PMF of 2,800 full-time soldiers responsible for administering and training the Militia. However, this rapid expansion did little to improve the readiness of Australian forces at the outbreak of the war.
During World War II, the Australian Army peaked at eleven infantry divisions and three armoured divisions, with a strength of 476,000 men in August 1942. This force was larger than Australia's population and economy could sustain, and the Army's strength was reduced in the second half of the year. The Militia, under the Defence (Citizen Military Forces) Act 1943, was able to serve outside Australian territory in the South West Pacific Area from January 1943, although few did so. The Army was further reduced by 100,000 members from October 1943 to free up manpower for industry.
The war had a significant impact on Australian society and the economy. It accelerated the development of Australia's manufacturing industry and led to a large fall in unemployment. It also contributed to the creation of a more cosmopolitan society, where women played a larger role and Australia developed a more independent foreign policy, shifting its focus from Britain to the United States. Additionally, World War II led to the introduction of compulsory military training for Australian males between the ages of 12 and 26, known as the Universal Service Scheme, which commenced in January 1940.
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Peacetime operations
The Australian Defence Force (ADF) is comprised of the Australian Army, the Royal Australian Navy, and the Royal Australian Air Force. The Australian Army, which is the principal land warfare force of Australia, has been involved in several peacekeeping operations since 1947, usually under the United Nations.
In peacetime, the Australian Army engages in multilateral and unilateral military exercises, emergency disaster relief, and humanitarian aid responses to domestic and international crises. The Army also provides support during natural disasters, such as floods, bushfires, and earthquakes, both within Australia and internationally.
The Australian Army has a long history of involvement in major wars, including the Second Boer War, World War I, World War II, the Korean War, the Malayan Emergency, the Indonesia-Malaysia Confrontation, the Vietnam War, the War in Afghanistan, and the Iraq War. During World War I, the Australian Army played a crucial role in securing German New Guinea, ensuring that no German outposts remained in the Pacific.
In more recent times, the Australian military committed the 2nd Battalion, Royal Australian Regiment (2RAR) to the Malayan Emergency from 1955 to 1963. They fought against the Malayan National Liberation Army (MNLA), a communist guerrilla army, and their operations consisted mainly of patrolling actions and guarding infrastructure.
The size of Australia's military has fluctuated over the years, with a steady increase in personnel since 2016. In 2019, the size of Australia's military was approximately 59,000 personnel, including active-duty and paramilitary forces.
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Frequently asked questions
The size of Australia's military has fluctuated over the years. In 2019, the military size was 59,000, a 1.55% increase from 2018.
The Australian Defence Force (ADF) is comprised of the Australian Army, the Royal Australian Navy, and the Royal Australian Air Force. The ADF is commanded by the Chief of the Defence Force (CDF), who is superior to the Chief of Army (CA).
The Australian Army has been involved in numerous major wars, including the Second Boer War, World War I, World War II, the Korean War, the Vietnam War, the War in Afghanistan, and the Iraq War.













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