Australia and Papua New Guinea (PNG) will soon be bound by a mutual defense obligation, requiring each to come to the other’s aid in the event of an attack. The two nations have recently drafted a major security agreement known as the Pukpuk Treaty, though it has not yet formally entered into force. As the Financial Times reported, the meeting between Australian Prime Minister Anthony Albanese and his counterpart James Marape on September 17 ended without a finalized agreement, as the PNG government requested more time to resolve internal disagreements. This delay underscores the far-reaching implications of the treaty, which for PNG could mean restrictions on future foreign investments in critical infrastructure. Following the treaty’s announcement, several neighboring countries expressed concern about its regional impact. China, in particular, warned both parties against signing the agreement, arguing that it would heighten tensions in the Pacific.

According to ABC News, the treaty states that both nations recognize that an armed attack on either country would be “dangerous to the other’s peace and security” and pledge to “act to meet the common danger.” On September 13, PNG Defense Minister Billy Joseph added that the agreement would lead to the “total integration” of the two countries’ military forces. Prime Minister Marape has repeatedly emphasized the necessity of the developing partnership, describing it as “a moral obligation” to safeguard Papua New Guinea’s security — something that, due to the country’s limited military capacity, cannot be guaranteed independently. Meanwhile, Beijing has continued voicing its opposition, asserting via the Chinese Embassy’s official X account that PNG should protect its sovereignty and maintain an independent foreign policy.

China’s criticism highlights not only the potential pitfalls of the treaty but also the broader controversy surrounding the alliance. While the agreement could enhance PNG’s security through closer cooperation with Australia, its terms may prove highly constraining in the long term. As the treaty envisions deep military integration, the disparity between Australia’s and PNG’s defense capabilities raises concerns that PNG may become increasingly dependent — and possibly subordinate — to its larger neighbor. Such an imbalance could have significant consequences, particularly as China’s disapproval might isolate PNG from other regional partners, forcing it to rely even more heavily on Australia.

Given these dynamics, the Pukpuk Treaty could mark a turning point in PNG’s foreign policy and its relationship with neighboring states. As the Post-Courier PNG noted in July 2024, since independence the country has adhered to a policy of “Universalism” — a “friends to all, enemies to none” approach that has allowed it to maintain stable and peaceful relations throughout the region while avoiding exclusive alliances. However, this principle may soon shift, with PNG’s foreign relations increasingly drawn into Canberra’s sphere of influence.

The ratification of the Pukpuk Treaty has the potential to reshape regional dynamics across the Pacific. Whether it will foster stability or intensify existing tensions remains uncertain. While the defense pact aims to strengthen Australia–PNG relations and bolster PNG’s security, it also reflects the broader sense of insecurity spreading throughout the Pacific. In such a fragile environment, emphasizing bilateral over multilateral cooperation risks deepening rivalries and reinforcing polarization. If national security is to remain a central priority, greater attention must be devoted to building a peaceful regional framework — one that prioritizes diplomacy and long-term stability over short-term strategic gains.