Indonesia and Australia are exploring expanded security cooperation that could include Japan and Papua New Guinea, following talks between Indonesia’s Defence Minister Sjafrie Sjamsoeddin and Australia’s Defence Minister Richard Marles.

Speaking after the meeting, Sjafrie Sjamsoeddin said the countries are considering new trilateral security arrangements and enhanced collaboration across the Indo-Pacific.

The discussions follow a security treaty signed by Indonesia and Australia last month, committing both countries to consult each other if either faces a threat.

Key developments:

• Indonesia, Australia and Japan may form a trilateral security framework.

• A separate Indonesia–Australia–Papua New Guinea arrangement is also under consideration.

• Both countries plan to expand intelligence sharing and defence cooperation.

• A proposed defence training facility on Morotai island (North Maluku) could host regional training.

Marles said the Morotai facility would remain under Indonesian control, though Australia could participate in training activities.

Separately, Sjafrie Sjamsoeddin said Indonesia is preparing troops for a potential international security mission in Gaza, though deployment depends on developments involving U.S. President Donald Trump’s Board of Peace initiative.

ℹ️ Reuters

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Australian Deputy Prime Minister and Minister for Defense, Richard Marles, and Indonesia’s Defence Minister Sjafrie Sjamsoeddin walk following their meeting in Jakarta, Indonesia, March 12, 2026. REUTERS/Willy Kurniawan
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Indonesia and Australia explore expanded security cooperation with Japan and Papua New Guinea
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