In PNG, the Pukpuk Treaty not only strengthens its defense relationship with Australia but also prompts a realignment of Australian strategy, influencing how major powers like China, the United States, and others engage in the region. The treaty demonstrates that small states are not merely reactive; they can take the initiative to defend their interests and manage the challenges of superpower competition.

The Pukpuk Treaty reflects how PNG is repositioning itself strategically due to limited capacity, geographic vulnerability, and internal security pressures. PNG has recognized its weaknesses in defense forces, including border patrol, sea patrols, internal security, police, and the equipment and software of its defense (training, doctrine, etc.).

The treaty will address these gaps by enhancing capacity, fostering interoperability with Australia, exploring recruitment of PNG staff into the Australian Defence Force (ADF), promoting joint training, and modernizing the military. By requesting the treaty, PNG is not merely accepting foreign assistance but choosing a partner and clearly defining the nature of cooperation, with its sovereignty as a central concern.

The political elite in PNG are using the treaty as a tool to influence the broader competition between the great powers. Part of the treaty’s design is a clear strategic counter-pressure by Australia against the rising Chinese influence in the Pacific.

Canberra is concerned that China’s growing influence through trade, investment, infrastructure, or even security arrangements with Pacific nations could pose a threat to Australia along its northern borders. The Pukpuk Treaty thus becomes a key part of Australia’s strategy to secure its neighborhood.

However, PNG is not passive; its foreign affairs ministry explicitly stated that the treaty will not include a third-party cooperation exception, and that PNG retains its constitutional right to engage in defense cooperation with other countries. This balancing act allows PNG to welcome Australian protection and investment while also trying to preserve flexibility in its foreign policy.

The Pukpuk Treaty shows how legal, constitutional, and domestic political constraints can serve as practical tools for small states to influence great powers. In Papua New Guinea, there is an ongoing debate: recently, retired Major General Jerry Singirok questioned concepts of sovereignty, non-alignment, and constitutionality, specifically whether integrating the PNG Defence Force into the ADF structures or adopting Australian military doctrine would be unconstitutional under PNG law.

Papua New Guinea also issued warnings that public consultation, parliamentary ratification, and legal safeguards are practical considerations. These constraints suggest that Australian strategic ambitions are not pursued unconditionally but require negotiation and moderation. PNG is leveraging its internal political processes to ensure its interests are protected. This demonstrates that small states are not merely vassals but hold significant agency through institutional rules, constitutional mechanisms, and civil-military relations.

The treaty reshapes how we view alliances and security in the Pacific. Currently, Australia has only a few formal mutual defense treaties. The Pukpuk Treaty is the first new treaty-level defense alliance in Australia in over 70 years. This indicates a shift from informal security cooperation, training, aid, and soft security towards more formalized mutual defense commitments.

For the Pacific, this means smaller states seeking such formal agreements gain greater bargaining power, more reliable security arrangements, and improved access to resources. It also increases the stakes in global competition. Any formal alliance is likely to provoke countermeasures by other major powers. In fact, China already warned PNG not to sign a treaty that restricts collaboration with other nations and stressed the importance of maintaining sovereignty and decision-making independence.

Being this close to Australia will limit PNG’s options, potentially tying it to Australia’s strategic interests, which may not align with those of PNG, leaving PNG vulnerable to diplomatic repercussions in its dealings with China.

There is also a constitutional risk; PNG’s legal framework might have to balance issues such as dual staffing, foreign military doctrine, foreign operational control, or access to bases. The treaty must protect PNG’s sovereignty while enabling productive cooperation. Additionally, there is a domestic political risk. A perception of lost sovereignty or involvement in an unwanted conflict could provoke public and political instability.

The case of PNG signals that small states are no longer just battlegrounds, but active creators of regional order. By taking the lead and signing such a treaty, PNG clarifies what it requires regarding defense cooperation, sovereignty safeguards, and strategic balance. Using domestic legal procedures (parliamentary ratification, constitutional review, popular debate), PNG ensures that any potential arrangement is stronger than past cooperation and aligns with its long-term interests. Other small states will observe this and may be encouraged to pursue more formal engagements and specific defense partnerships instead of informal or ad hoc arrangements.

Fawad Afridi is an MPhil Scholar at the National Defense University. Views expressed in this article are the author’s own. 

What the Pukpuk Mutual Defense Treaty Tells Us about the Pacific Security Order was originally published on Global Security Review.

After World War II, both Japan and Germany became allies of the United States while the Soviet Union became a serious enemy. Most importantly, the Soviet Union established in Eastern Europe an alliance of nations under the Warsaw Pact. Thus, a decades-long Cold War began.

It was widely assumed that the collapse of the Soviet Union heralded an era of global cooperation and the end of great power competition and conflict. Arms control brought about the Intermediate Nuclear Forces Treaty (INF), Strategic Arms Reduction Treaty (START I and II) and the Conventional Forces in Europe Treaty (CFE) agreements.

Today, however, as many military and diplomatic experts conclude, the dangers facing the United States and its allies are more complex and more serious than perhaps at any time since the end of WWII. Now, more than ever, arms control remains elusive.

Nuclear conflicts are now among the most serious potential dangers, including proliferation of nuclear weapons, the pending end to formal strategic arms limits, and the actual use of theater nuclear force arising out of existing conventional conflicts.

To lessen such dangers, nuclear abolitionists proffer numerous arms control proposals. Six ideas are most common: (1) a policy of no first use of nuclear weapons; (2) adoption of a “minimum deterrent” nuclear strategy; (3) the elimination of intercontinental ballistic missiles (ICBMs); (4) a unilateral freeze of US nuclear force development; (5) an extension of New START nuclear arms limits; and (6) abandonment of any new theater nuclear forces such as the nuclear sea-launched cruise missile (SLCM-N) or the sea-launched cruise missile. All of these strategies harm American and allied security and make worse the strategic nuclear balance.

The US extended deterrent has, for 70 years, rested on the option of using nuclear force to stop massive conventional attacks on US forces and allies overseas. Depending on the regional military balance, such nuclear extended deterrent options were, and remain, viewed by our allies as central to keeping their nation safe from Soviet/Russian and Chinese aggression.

Minimum deterrence strategies assume the only retaliatory targets the US needs to hold at risk are adversary cities where a few hundred nuclear warheads are all that is needed to deter. This doctrine assumes Russia and China will be completely deterred by the fear of losing large numbers of their civilian population. But this ignores the fact that these regimes murdered millions of their own people to gain power—showing little value for human life. Even worse, a minimum deterrence strategy would also leave alive the leaders of such nations as well as their nuclear and conventional forces with which they will commit aggression.

Cutting out the land-based ICBM force and a third of the ballistic missile submarine force would unilaterally reduce the US strategic nuclear force to around 500 at-sea on-alert warheads. This would be only a third of the allowed New START treaty force and give an 8 to 1 to 18 to 1 Russian and Chinese advantage in nuclear weapons, respectively. This would ensure that both nations frequently use nuclear weapons for coercion and blackmail.

A freeze on American nuclear force development would be a deterrence disaster. The US has not yet fielded any portion of the modernized triad, which is not rusting into obsolescence. Russia has completed over 90 percent of its own modernization and China is well on its way to tripling the size of its nuclear force over the next decade. Neither would participate in a unilateral freeze. Again, the United States would face a far superior adversary.

An extension of New START sounds attractive but would be harmful to American interests. It would delay any needed uploading of American warheads. It would not affect or make transparent China’s breathtaking nuclear build-up. And without a sea change in Russian behavior, verifying current arms limits would still be impossible, given the past five years of treaty violations by Moscow.

The Congressional Strategic Posture Commission report of October 2023 emphasized the urgency of rebalancing the current gap in US regional nuclear forces. The SLCM-N and better theater air deterrence were key recommended upgrades, both of which would be eliminated by a number of these proposals. It is precisely this deterrence gap which Moscow has leveraged to limit US and allied assistance to Ukraine.

The restraint these arms control ideas wish upon the US military assumes that Russia and China will reciprocate. But in the multiple decades after the end of the Soviet Union, massive US restraint was eventually met with what Admiral Richard has described as a “breathtaking” Chinese build-up and a near matching Russian modernization. As former Secretary of Defense Harold Brown once warned, “We build, they build. We stop; they build.”

Now is the time to reject nuclear abolition for what it is, a purposeful effort to weaken the United States. American lives and freedom depend on it.

Peter Huessy is Senior Fellow at the National Institute for Deterrence Studies. Views expressed are his own. 

Making Nuclear Blackmail Great Again was originally published on Global Security Review.