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What Does Papua New Guinea’s New Defense Pact with Australia Mean?

Papua New Guinea approved a mutual defense treaty with Australia, marking a pivotal move for Pacific security and shifting alliances amid China’s expanding presence.

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By Marcus Bell

5 min read

Image for illustrative purpose.
Image for illustrative purpose.

Papua New Guinea’s cabinet approval of the Pukpuk defense treaty with Australia is being hailed as a diplomatic milestone in the evolving security landscape of the Pacific.

The pact is designed to reinforce mutual defense commitments and mark a new stage in strategic cooperation between the two nations.

The announcement came as Prime Minister James Marape confirmed cabinet endorsement following weeks of anticipation and regional scrutiny.

The decision positions PNG alongside Australia in a mutual assistance arrangement aimed at countering new security threats across the Pacific.

What is the Pukpuk Treaty, and why is it significant?

Named after the local word for crocodile, the Pukpuk Treaty is a landmark mutual defense agreement under which both nations are obligated to assist each other in the event of an attack.

Prime Minister Marape emphasized the pact’s uniqueness, noting that Australia holds only one other such agreement.

The treaty represents a proactive step as both countries seek to navigate growing competition and shifting alliances in the region.

The approval came at a time when regional defense arrangements have garnered heightened attention due to China’s expanding reach and recent security deals with Pacific islands.

The Pukpuk Treaty’s mutual defense clauses signal a commitment that reaches beyond symbolic alliance.

Each country pledges direct assistance if either comes under threat, creating a new framework for shared security in the Pacific and enabling a swift united response to challenges.

It also builds on decades of historic cooperation, making explicit what had previously been understood through informal arrangements and bilateral ties.

Did you know?
Australia is a signatory to the AUKUS (Australia, United Kingdom, United States) trilateral security partnership, announced in September 2021.

How does the treaty impact military cooperation and personnel?

A notable feature of the agreement is its provision to allow up to 10,000 Papua New Guineans to serve with the Australian Defence Force under dual arrangements.

This is an unprecedented opportunity for PNG nationals to participate directly in Australia’s military operations and training, deepening defense ties and expanding practical cooperation.

The initiative strengthens partnerships between the two countries’ armed forces, with PNG officials able to undertake deployments and joint exercises alongside their Australian counterparts.

Provisions in the pact were designed to respect each nation’s separate defense relationships, ensuring flexibility as interests and alliances in the region evolve.

Such arrangements are expected to facilitate a more robust exchange of expertise, skills, and operational experience, thereby supporting PNG’s growing defense capabilities.

What are the strategic implications for Pacific security?

The treaty comes at a time of intensifying rivalry in the Pacific between major powers. Australia’s pursuit of closer ties with PNG follows China’s controversial and secretive agreement with the Solomon Islands in 2022.

Regional competition has prompted Australia, the United States, and other allies to intensify security pacts aimed at ensuring freedom of navigation and stability.

Australia’s cabinet approval is not only a response to recent moves by China, but also an effort to assert influence and strengthen alliances. PNG’s proximity to key Pacific sea lanes and its strategic location make it an attractive partner.

Marape’s statement underscored the importance of balancing defense agreements while respecting rights to pursue third-party relationships, a diplomatic nod to existing regional complexities.

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What hurdles remain before full ratification?

While the PNG cabinet has given its backing, the treaty still needs to be ratified by the parliaments of both nations before it enters into force.

PNG government officials confirmed the deal must move through legislative channels, with expectations that it could take effect by the end of the year if all goes smoothly.

The process was temporarily set back for Canberra, as Prime Minister Albanese’s Pacific visit coincided with cabinet delays and sovereignty concerns in other regional agreements, notably with Vanuatu.

Parliamentary ratification will be the final test of political will and domestic support in both nations as they move forward.

If a quorum is again lacking or debate arises over sovereignty, timelines could be affected, but support currently appears robust.

How might regional players respond to the PNG-Australia pact?

Regional reactions are likely to come from countries that balance their ties with China, Australia, and the United States.

China’s response to the Pukpuk Treaty is anticipated, given its Pacific ambitions, while island nations that have recently signed new pacts may recalibrate their own positions.

The U.S. signed a Defense Cooperation Agreement with PNG last year, further complicating the web of security relationships.

As Australia and PNG consolidate their alliance, competitors and partners across the Pacific will watch for signs of shifting allegiances.

The move stands as a rebuff to Chinese ambitions and elevates the standing of both countries in future negotiations related to logistics, development, and defense.

With the cabinet approval and expected parliamentary ratification, Papua New Guinea and Australia are poised to enter a new era of defense partnership.

This agreement is likely to shape the next wave of policy discussions and diplomacy as Pacific nations reassess their security priorities in an increasingly contested region.

Will the PNG-Australia defense pact reshape Pacific regional security?

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