
Australia has had a complex history of international relations, with the country being joined to several other nations at different points in time. Australia was historically part of the British Empire, and in 1901, six colonies were joined together to create the Commonwealth of Australia, a self-governing Dominion within the Empire. Over time, Australia gained more control over its external policies, and in 1931, the United Kingdom approved the Statute of Westminster, which recognised the autonomy of Australia and other Dominions. Australia also fought alongside the British Empire in both World Wars. In 1940, Australia established diplomatic relations with the United States, and the two countries have been allies since 1951 under the ANZUS treaty. Australia has also maintained close ties with New Zealand, including free mobility of citizens and free trade agreements. In addition, Australia has increased its focus on foreign policy ties with other Asia-Pacific nations and experienced significant waves of immigration from various continents, contributing to its multicultural democracy.
| Characteristics | Values |
|---|---|
| Date of Federation | 1 January 1901 |
| Former British colonies joined to form Federation | Six colonies, including New South Wales, Queensland, Victoria, Tasmania, South Australia, and Western Australia |
| First Prime Minister | Edmund Barton |
| Current ties with other countries | Highly integrated relationship with New Zealand; bilateral diplomatic relations with the United States since 1940; allied with the United States under the ANZUS treaty since 1951; maintains an international aid program for 75 countries |
| Current form of government | Constitutional monarchy with a parliamentary democracy |
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What You'll Learn

Australia was a part of the British Empire
The Balfour Declaration of 1926 recognised that the United Kingdom and the Dominions were "autonomous Communities within the British Empire, equal in status, in no way subordinate one to another in any aspect of their domestic or external affairs". In December 1931, the United Kingdom approved the Statute of Westminster, formalising this relationship. Australia achieved full sovereignty from the UK on a progressive basis.
Australia fought as part of the British Empire in both world wars. In the First World War, about 60,000 of the 324,000 men who served overseas were killed, and another 152,000 were wounded. Many Australians regard the defeat of the Australian and New Zealand Army Corps (ANZAC) at Gallipoli in 1915 as the "baptism of fire" that forged the new nation's identity. During the Second World War, Australia joined the Allies in fighting against Nazi Germany.
In the three decades following World War II, Australia experienced significant increases in living standards, leisure time, and suburban development. Governments encouraged a large wave of immigration from across Europe, and these migrants were called "New Australians". Australia's demography and culture transformed as a result of a large and ongoing wave of non-European immigration, mostly from Asia, following the abolition of the last vestiges of the White Australia policy in 1973. The Australia Acts of 1986 severed the remaining constitutional ties between Australia and the United Kingdom.
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Australia is now a member of the Commonwealth
Australia has a long and complex history, with the human history of the continent dating back 50,000 to 65,000 years to the arrival of the first ancestors of Aboriginal Australians. The modern nation of Australia, however, is a more recent development, having come into existence on January 1, 1901, as a federation of former British colonies. This date marked the unification of six colonies to create the Commonwealth of Australia, with Edmund Barton sworn in as the first prime minister.
While Australia became a sovereign nation in terms of its domestic affairs in 1901, the United Kingdom maintained control over its relations with other nations. Over the following decades, Australia gradually gained control over its external policy, a process that was recognised by the Balfour Declaration of 1926, which affirmed the equality of the United Kingdom and its Dominions. In 1931, the United Kingdom approved the Statute of Westminster, formalising this relationship, and in 1939, Australia's Statute of Westminster Adoption Act became law.
Australia fought alongside the British Empire and the Allies in both World Wars and experienced significant social and economic changes in the post-war period, including increased living standards, leisure time, and suburban development. Australia also received a large wave of immigration from across Europe, with these migrants known as "New Australians". Australia's demography and culture underwent further transformation following the abolition of the White Australia policy in 1973, which led to a significant increase in non-European immigration, primarily from Asia.
In more recent times, Australia has continued to strengthen its international ties, including maintaining a close relationship with neighbouring New Zealand, with free mobility of citizens and free trade under the Closer Economic Relations agreement. Australia also has a long-standing alliance with the United States, dating back to World War II and formalised by the ANZUS treaty in 1951. Despite a referendum in 1999 in which voters chose to maintain the monarchy, Australia has gradually severed its constitutional ties with the United Kingdom, gaining full sovereignty through progressive steps over time.
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Australia's foreign policy is independent of the UK
Australia was previously a part of the British Empire, and later the Commonwealth, and fought alongside the British Empire in the two world wars. However, Australia's foreign policy is now independent of the UK.
On January 1, 1901, six colonies were joined together to create the Commonwealth of Australia, a self-governing Dominion in the British Empire. While the new nation was sovereign when it came to its domestic affairs, the UK maintained control over its international relations. Over the next four decades, Australia gradually gained control over its foreign policy. The Balfour Declaration of 1926 recognised that the UK and the Dominions were "autonomous Communities within the British Empire, equal in status, in no way subordinate one to another in any aspect of their domestic or external affairs." In December 1931, the UK approved the Statute of Westminster, formalising this relationship. On October 9, 1942, Australia’s Statute of Westminster Adoption Act became law, with retroactive effect from September 3, 1939, the date World War II commenced.
The Australia Acts of 1986 severed the remaining constitutional ties between Australia and the UK, marking a significant step towards Australia's independence in foreign affairs. Despite this, Australia continues to recognise the monarch as Queen of Australia. In a 1999 referendum, 55% of voters rejected abolishing the monarchy and becoming a republic.
Australia has since pursued its own foreign policy agenda, independent of the UK. Australia has been allied with the United States under the ANZUS treaty since 1951, marking a shift from the UK as its principal ally. Australia has also established diplomatic relations with various other countries, including New Zealand, Germany, Japan, Taiwan, Thailand, and South Korea. Australia maintains an international aid program under which around 75 countries receive assistance.
Some political parties, such as the Australian Greens, advocate for an even more independent foreign policy, promoting peace, human rights, and diplomacy. They aim to reduce reliance on the United States and strengthen regional cooperation.
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Australia has strong ties with New Zealand
Australia and New Zealand have a long history of collaboration and cooperation. Both countries were part of the British Empire, with New Zealand becoming a self-governing dominion in 1907, six years after Australia gained self-governance.
The two countries have a strong economic relationship. Australia is New Zealand's largest goods and services trading partner, and New Zealand is Australia's fourth-largest destination for goods exports and its largest destination for services exports. The Australia and New Zealand Closer Economic Relations (CER) agreement is a free-trade agreement that further strengthens their economic bond. New Zealanders invest more in Australia than in any other foreign country, and Australia is New Zealand's largest source of foreign direct investment.
The two countries also have a long-standing defence and security relationship. During World War I, soldiers from both countries fought together as the Australian and New Zealand Army Corps (ANZACs) in the Battle of Gallipoli, which is commemorated annually in both countries. Australia is New Zealand's only formal defence ally, and both countries are members of the Five Eyes intelligence-sharing partnership.
In addition to defence cooperation, Australia and New Zealand collaborate on diverse foreign policy, security, and trade issues, including in international forums such as the United Nations and the World Trade Organization. There is also significant movement of people between the two countries, with an estimated 670,000 New Zealand citizens living in Australia and 70,000 Australians living in New Zealand. Over one million people in Australia were born in New Zealand or have at least one New Zealand-born parent.
Despite these strong ties, there have been some differences and areas of discord between the two countries, particularly regarding race, immigration, and defence policies. Australia has strengthened its relationship with the United States, becoming a close ally and security partner, while New Zealand has remained more ambivalent about American policies and has designed its armed forces for limited regional operations.
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Australia is an ally of the United States
Australia and the United States have been allies since 1951, when they signed the ANZUS treaty, a full three-way military alliance between Australia, New Zealand, and the United States. The ANZUS treaty underpins the Australia-United States Alliance and binds the two countries to consult on mutual threats and act to meet common dangers. The alliance is the foundation of defence and security cooperation between the two countries, increasing Australia's ability to protect itself and its interests by providing access to world-leading defence hardware and technologies, training courses, combined exercises, and vital intelligence capabilities.
The United States and Australia have a strong relationship, characterised by cultural similarities and robust bilateral arrangements. There are strong formal structures of cooperation between the two countries spanning foreign policy, defence and security, intelligence, development, energy, environment, education, law, trade, and investment. The two countries have signed treaties on mutual legal assistance, tax, defence trade cooperation, health cooperation, space, science and technology, emergency management cooperation, and social security. They also belong to a number of the same international organisations, including the United Nations, ASEAN Regional Forum, Asia-Pacific Economic Cooperation (APEC), G-20, International Monetary Fund (IMF), Organisation for Economic Cooperation and Development (OECD), World Bank, and the World Trade Organization (WTO).
The United States and Australia have also cooperated on several military endeavours, including the Korean War, Vietnam War, Gulf War, and the Iraq War. They also participate in joint military exercises, such as the biennial Talisman Saber, designed to ensure and demonstrate the ability of the two defence forces to work together with the highest levels of interoperability. The two countries also work closely in Afghanistan and cooperate on efforts to defeat ISIS in Iraq and Syria, as well as address challenges and counter foreign terrorist fighters and violent extremism.
The United States and Australia first established diplomatic relations on 8 January 1940, and the two countries have enjoyed 28 years of sustained annual economic growth. Australian companies have invested an estimated US $20.9 billion in new capital projects in the US between January 2003 and February 2017, while over 1.3 million Australian tourists visit the United States each year, supporting thousands of jobs across all 50 states. The United States also receives many immigrants from Australia, with the population increasing to more than 25.5 million by 2021, with 30% of the population born overseas.
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Frequently asked questions
Australia was joined to the United Kingdom as part of the British Empire.
Australia gained independence from the UK on a progressive basis. On January 1, 1901, the British Parliament passed legislation allowing the six Australian colonies to govern in their own right as part of the Commonwealth of Australia. The Balfour Declaration of 1926 recognised the United Kingdom and its Dominions as "autonomous Communities within the British Empire, equal in status, in no way subordinate one to another in any aspect of their domestic or external affairs". In 1931, the UK approved the Statute of Westminster, which was adopted in Australia in 1942. The Australia Acts of 1986 severed the remaining constitutional ties between the two countries.
Yes, Australia fought as part of the British Empire in World War I and World War II.
Autonomous parliamentary democracies began to be established throughout the six British colonies from the mid-19th century. The modern nation of Australia came into existence on January 1, 1901, as a federation of former British colonies.
Australia maintains a deeply integrated relationship with neighbouring New Zealand, with free mobility of citizens and free trade. Australia is also closely allied with the United States, with which it established diplomatic relations in 1940. Australia also has an international aid program under which around 75 countries receive assistance.






















