As of September 17, 2025, Australia and Papua New Guinea (PNG) have signed a defence communique but postponed the formal signing of a landmark mutual defence treaty. The treaty, elevating their security ties to the level Australia holds with the US and New Zealand, awaits cabinet approvals in both countries. The pact integrates defence forces, allows military service across borders, and offers PNG nationals a pathway to Australian citizenship, amid efforts to counter China's growing Pacific influence.