Papua New Guinea, Australia to vow mutual defence in new treaty
The treaty commits Australia and Papua New Guinea to mutual defense and military cooperation amid rising regional security concerns and increased Chinese influence, officials said.
- Australia and Papua New Guinea planned to sign a mutual defense treaty during Albanese's visit to Port Moresby on the week of September 16, 2025.
- The treaty was delayed due to Papua New Guinea's independence celebrations and logistical issues despite cabinet endorsement and broad confidence from officials.
- Known as the Pukpuk Treaty, the agreement will establish joint defense measures, integrate the armed forces of both nations, and allow nationals from Australia and Papua New Guinea to enlist and serve within each other's military organizations.
- The treaty acknowledges that a military strike against one Party in the Pacific region poses a threat to the peace and security of both nations, obligating them to respond cooperatively to shared dangers.
- The treaty's delay highlights challenges in Pacific diplomacy amid Australia's efforts to counter China's growing influence and emerging security threats in the region.
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Returning home without a PNG defence treaty would be another blow for Albanese after Vanuatu shelved plans to sign a security deal with Australia last week.

Papua New Guinea, Australia to vow mutual defence in new treaty
Australia and Papua New Guinea will commit to defending each other from armed attacks as they face "emerging threats" to their security, a new defence treaty seen by AFP on Tuesday showed.
Australia and Papua New Guinea have pledged to defend each other against potential armed attack, under a new defence pact seen by AFP on Thursday.
Australia, Papua New Guinea to Sign Mutual Defense Pact
Prime Minister Anthony Albanese said Monday that Australia and Papua New Guinea will sign a defense treaty this week, requiring their forces to work together if either country comes under attack. The pact, known as the Pukpuk Treaty after the Tok Pisin word for crocodile, will be signed on Wednesday in Port Moresby by Albanese and Papua New Guinea Prime Minister James Marape. Under the deal, Australia will also gain access to designated militar…
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