Vanuatu lodged a case at the International Court of Justice on Wednesday, asking judges to settle who owns Matthew and Hunter, two volcanic islets rarely visited beyond Melanesian fishermen and French surveyors.
Umaenupne, as the islanders call Matthew, and Umaeneg, their name for Hunter, sit roughly three hundred kilometres from New Caledonia, the French territory whose Kanak population has waged its own long campaign for self-rule.
Port Vila has claimed sovereignty over the islets since independence in 1980, arguing that France and Britain drew colonial boundaries without consulting local communities. Decades of failed talks finally pushed the government toward The Hague.
The Pacific dispute would ordinarily count as a footnote in European diplomacy. It lands instead beside a rockier argument over the Falklands and the Chagos archipelago, where the United States now hesitates to back British and French claims as firmly as it once did.
The disputes point to a widening gap between Europe’s hold over remote water and its capacity to defend that hold without American cover.
A Pacific Colonial Hangover
France annexed Matthew and Hunter in 1929 and reinforced its claim in 1975 with plaques declaring sovereignty, a gesture many in Vanuatu read as a hurried move before independence arrived.
New Caledonia’s pro-independence leader Christian Tein backed Port Vila’s claim during a visit last month, a gesture that pushed New Caledonia’s French-loyalist government to suspend trade with Vanuatu.
Paris denies any plan to concede territory, and French nationalist politicians have seized on the row to accuse President Macron of surrendering French soil.
The dispute exposes a wider point. French sovereignty across the Pacific rests less on settlement or population than on colonial paperwork signed before most of today’s claimants were born. New Caledonia itself remains under Paris’s authority only because a 2021 independence referendum, boycotted by most Kanak voters, produced a lopsided result.
Vanuatu’s case at The Hague therefore carries a weight beyond two uninhabited rocks, since it invites judges to test the legitimacy of borders drawn without local consent across the wider region.
Washington Grows Less Certain
A similar unease now touches London’s Atlantic holdings. President Trump said last weekend he was reviewing the long-standing American position of neutrality over the Falklands, telling reporters he reviews every stance eventually.
Argentina’s Javier Milei responded by preparing a national address for Thursday evening, describing the Malvinas cause as a solemn priority for Argentines and vowing to defend his country’s interests “tooth and nail”.
Buenos Aires last pressed the claim by force in 1982, a conflict that killed roughly nine hundred combatants and ended in British victory.
A parallel retreat is already visible over the Chagos Islands, where London agreed in 2025 to hand sovereignty to Mauritius and to keep the joint US-UK base on Diego Garcia under a ninety-nine-year lease.
The transfer has stalled, because the arrangement needs Washington’s consent to amend a 1966 treaty, and Trump has called the handover “an act of great stupidity”.
European sovereignty across the South Atlantic and the Indian Ocean increasingly leans on a US ally that no longer treats old alliances as automatic.
Global Chokepoints Draw New Attention
Distant islands count less for their soil than for the water surrounding them, and narrow channels elsewhere show why ownership of remote outposts carries weight far beyond their size.
Iranian pressure on the Strait of Hormuz and Chinese manoeuvres near Taiwan have already pushed European navies to widen their presence outside home waters, sending French, Italian and British carrier groups on rotations through the Indo-Pacific. France alone keeps more than twenty vessels stationed permanently across its Pacific and Indian Ocean territories, guarding the second-largest exclusive economic zone on Earth.
Losing uncontested control of small outposts such as Matthew, Hunter or the Falklands would not sink that footprint outright, but it would remove convenient anchorages and weaken the legal claims that justify continuous naval movement through distant water.
Europe’s Narrowing Options at Sea
The Vanuatu case could take years to resolve at The Hague, given France’s right to reject the court’s jurisdiction outright. Milei’s address may prove more theatre than policy, and Trump’s Falklands remarks could fade as quickly as they appeared on Tuesday.
The direction of travel stays constant regardless. Washington grows less willing to underwrite European claims over water it does not need for itself, and European governments have not built the independent means to fill that space on their own.
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