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Why this defence treaty with a Pacific neighbour matters just as much as submarines

Jennifer Parker Defence and national security expert September 15, 2025 — 5.00am

Debate on Australia’s defence strategy often centres on the budget and the plan to acquire nuclear-powered submarines . Both matter, but an equally critical pillar – partnerships – receives far less attention. The anticipated signing of what Papua New Guinea’s defence minister has called a “mutual defence” treaty underscores this point, highlighting the renewed focus on a neighbour whose security is inseparable from Australia’s own.

The signing of a defence treaty between Australia and Papua New Guinea is expected this week, when Prime Minister Anthony Albanese travels to PN

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