New Zealand and the Cook Islands have signed a new defence and security agreement, marking a significant step toward restoring ties after a prolonged diplomatic dispute triggered by the Pacific nation’s growing engagement with China. The declaration, finalised on Thursday, brings closure to tensions that had strained relations between the two long-standing partners for over a year.
The rift began in early 2025 when the Cook Islands entered into a comprehensive strategic partnership with China without prior consultation with New Zealand. The move raised alarm in Wellington, which viewed the lack of transparency as a breach of the mutual obligations underpinning their unique constitutional relationship. The Cook Islands, a self-governing nation in “free association” with New Zealand, shares close defence and foreign policy coordination with Wellington, along with citizenship arrangements for its people.
New Zealand responded sharply at the time, expressing “significant concern” over the agreement, which covered areas such as deep-sea mining, infrastructure cooperation and broader economic ties. The development was particularly sensitive given increasing geopolitical competition in the Pacific, where China has been expanding its influence.
In a bid to signal its displeasure and push for greater clarity, New Zealand suspended approximately NZ$29.8 million in financial assistance to the Cook Islands, a move that drew criticism from Cook Islands Prime Minister Mark Brown. He described the decision as patronising and inconsistent with the nature of a modern partnership between the two countries.
The newly signed declaration seeks to address these concerns by reaffirming both nations’ commitment to consult each other on defence and security matters and to act in good faith. Officials on both sides indicated that the agreement establishes clearer expectations and reduces ambiguity in their relationship, particularly in an increasingly complex regional security environment.
New Zealand Foreign Minister Winston Peters acknowledged that relations had faced “serious disagreements” in recent months but emphasised that the pact represents a forward-looking effort to rebuild trust and cooperation. He highlighted the importance of unity and transparency, especially as geopolitical tensions intensify across the Pacific region.
Following the agreement, New Zealand is set to resume its financial support to the Cook Islands, signalling a normalization of ties. Meanwhile, Prime Minister Brown welcomed the declaration, stating that it would help both countries move beyond past disagreements and strengthen regional security cooperation.
Despite the renewed partnership, the Cook Islands’ earlier agreement with China remains intact. While New Zealand officials indicated that their concerns have been addressed through the new framework, the situation underscores the delicate balance Pacific nations face as they navigate relationships with both traditional allies and emerging global powers.
The episode highlights the broader strategic contest playing out in the Pacific, where small island nations are increasingly at the centre of geopolitical competition. For New Zealand and the Cook Islands, the latest defence pact represents an attempt to stabilise their historic ties while adapting to a shifting regional landscape.
