Who Decides When Australia Goes to War?

The debate over parliamentary approval for military deployments. 

As tensions rise in the Middle East, the Australian government is considering sending defensive military support to the Gulf nations being struck by Iran following the escalating conflict involving Israel, the United States and Iran. The United States remains one of Australia’s closest allies, and the possibility of military assistance raises concerns that Australia could be drawn into a wider regional conflict. 

The Foreign Minister Penny Wong confirmed that the Australian government has been requested to defend against Iranian missile strikes. 

“Many countries which are non-participants have been attacked by Iran through this," Wong stated. “You would anticipate as a consequence that we have been asked for assistance and we will work through that carefully.” 

While Wong reinforces that Australia’s involvement would be defensive and would not include ground troops inside Iran, the debate has reinvigorated a long-standing constitutional question: who has the authority to send Australians into war? 

Since federation, neither the Australian Constitution nor defence legislation has required the government to consult with the Parliament, but the decision rests with the executive government - a power rooted in Sections 61 and 68 of the Constitution. 

How the war powers currently work in Australia

The authority to deploy the Australian Defence Force (ADF) currently lies with the executive branch of government, meaning the Prime Minister and Cabinet. On a constitutional basis, Section 61 of the Australian Constitution vests executive power in the Crown, exercised by the Governor-General as the King’s representative, while Section 68 establishes the Governor-General as commander-in-chief of the armed forces. The authority to commit Australian forces derives from executive “prerogative powers” inherited from the British Westminster system at federation in 1901. 

As a result, decisions about military deployments are typically made by the Prime Minister and the National Security Committee of Cabinet. While Parliament may be informed or debate military operations after the fact, it is not required to approve the deployment of Australian forces. This structure has prompted ongoing debate about whether Parliament should have a greater role in authorising the use of military force. 

How has this been seen throughout history? 

Australia has repeatedly entered conflicts throughout modern Australian history, with governments deploying Australian forces through executive decision without a formal vote in Parliament. 

Following the September 11 attacks in 2001, Prime Minister John Howard invoked the ANZUS Treaty in support of the United States. Australia joined the US-led invasion of Afghanistan, where no parliamentary vote had authorised the deployment. Similarly, in 2003, Prime Minister John Howard joined the US-led invasion of Iraq. The Parliament debated the decision but again, did not vote on authorisation. During the Vietnam War, Prime Minister Robert Menzies announced the deployment of Australian troops in 1965. This decision was made by the executive government with no parliamentary approval required. 

These examples illustrate how successive governments have exercised executive authority to commit Australian forces to conflict, often without direct parliamentary approval. 

Proposal for War Powers Reform 

Widespread concerns about executive power have led to calls for reform. The Greens Senator Jordon Steele-John introduced the Defence Amendment (Parliamentary Approval of Overseas Service) Bill in 2020. The Greens have pledged to reintroduce the bill, with widespread community support evidenced by a 2023 poll suggesting strong public support for war powers reform. The proposal would require Parliament to debate and vote before ADF personnel could be deployed overseas. Approval would be required from both houses of Parliament. The proposal allows the government  to deploy forces immediately in emergencies, with Parliament required to review the decision afterward. 

The announcement from the Albanese Labor Government to send 85 military personnel, including a RAAF E-7A Wedgetail aircraft, to the Gulf and medium-range air-to-air missiles into the conflict has renewed debate about Australia’s war powers.

Greens leader Larissa Waters argued that the situation demonstrates why Australians “deserve a say before their families are sent to war.” Despite these calls, major parties have historically resisted changes to Australia’s war powers framework.

Arguments For and Against Reform

The proposal to require parliamentary approval before deploying Australian forces has generated significant debate among policymakers, defence officials and legal scholars. Supporters of reform argue that decisions to commit Australian troops to conflict should involve democratic oversight. They contend that requiring a parliamentary vote would strengthen accountability by ensuring elected representatives have the opportunity to scrutinise the government’s justification for military action. Advocates also argue that greater transparency could improve public trust and help prevent controversial or unpopular wars. By involving Parliament directly in the decision-making process, reform supporters believe Australia would align more closely with democratic principles seen in other parliamentary systems.

However, critics argue that transferring decision-making authority to Parliament could create risks for national security. Government officials and defence leaders have frequently warned that military deployments often require rapid responses to emerging threats, and a parliamentary vote could delay urgent action. Decisions about military operations may also rely on classified intelligence that cannot be publicly disclosed during parliamentary debates. In addition, critics argue that publicly signalling military intentions through parliamentary approval could compromise operational security or provide strategic advantages to adversaries. As a result, successive Australian governments have maintained that the current system, which places war powers within the executive branch, provides the flexibility necessary to respond effectively to international crises.

The Current Context

Growing tensions in the Middle East have once again drawn attention to Australia’s war powers framework. Concerns for conflict escalation in the Gulf remain critical as Iran retaliates to US-Israeli attacks by launching missiles and drone attacks against regional states and US-linked assets. Australia’s recent deployment of the RAAF E-7A Wedgetail surveillance aircraft, 85 ADF personnel and air-to-air missiles are intended to assist allied defence operations in the Gulf. The Albanese government iterates the deployment as defensive support for regional security, and aiming to protect Australians and assist allies. Australia’s ANZUS alliance with the US often leads to support for US-led operations, with alliance commitments shaping Australia’s strategic military decisions. In March 2026, the debate on parliamentary involvement resurfaced as military deployments continue to occur without a parliamentary vote. Reform advocates argue Parliament should have a say before deployments occur. 

In the current state of affairs, war powers sit with the executive government. Parliament does not need to approve deployments. This pattern follows historical precedent seen in the Afghanistan, Iraq and Vietnam conflicts. The Greens and some legal scholars argue for greater democratic oversight. Governments and defence officials argue executive control allows rapid response. Debates reflect broader questions regarding democratic accountability, national security and Australia's obligation to our allies.

So what do you think? Should decisions that send Australians into combat require approval from Parliament?

Sources

• The Australian Constitution - Parliament of Australia
• Parliament of Australia - The Role of Government and Parliament in the Decision to go to War
• Federal Register of Legislation 
• Australian War Memorial 
• Parliament of Australia - Defence Amendment (Parliamentary Approval of Overseas Service) Bill 2020
• ABC News - Australia Sending Wedgetail aircraft to Gulf
• SBS News - Australian military support to Gulf partners
• Department of Defence