It's been the busiest fortnight in Australia–Pacific diplomacy in recent memory. In the space of ten days, Australia signed the Nakamal Agreement with Vanuatu, the Vuvale Union and a surprise Ocean of Peace Alliance with Fiji, and saw the Pukpuk Treaty with Papua New Guinea come into effect — all while marking Solomon Islands Independence Day and flagging a comprehensive treaty with Honiara by year's end.

On the very same day the Fiji deals were signed, China tested a submarine-launched ballistic missile over the Pacific, sparking claims of a deliberate signal to the region.

Sam Roggeveen is joined by Dr Connor Graham to unpack the missile test, why Pacific nations have responded more cautiously than Australia and New Zealand, and what China really wants from the region.

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