Milei Threatens International Arbitration Over Falklands Oil Project

Argentine President Javier Milei has said his government will pursue international arbitration against the United Kingdom over an offshore oil project near the disputed Falkland Islands, sharply escalating a long-running dispute over resources in the South Atlantic.

According to a presidential statement, Argentina has given the UK two weeks to suspend work on Sea Lion, an oilfield being developed by Israel's Navitas Petroleum and the UK's Rockhopper Exploration. If London does not comply, Buenos Aires said it would ask the International Tribunal for the Law of the Sea, a Hamburg-based maritime court, to order a temporary halt to the project.

The statement warned that Argentina "will not stand idly by" and accused the UK of causing "irreversible and irreparable" harm to Argentine sovereign rights. The tribunal, established under the 1982 UN Convention on the Law of the Sea, can issue legally binding emergency orders, though it has no enforcement mechanism to compel a government to comply.

Foreign Minister Pablo Quirno described the move as "a historic and unprecedented step" in Argentina's nearly two-century campaign to assert sovereignty over the archipelago, which it calls the Malvinas. "Whoever explores or exploits our natural resources in the Malvinas without Argentine authorization must face the consequences," he wrote on X.

The UK rejects Argentina's sovereignty claim, maintaining that the islanders have the right to determine their own future and develop their natural resources. In a 2013 referendum, residents voted overwhelmingly to remain a British overseas territory. Argentina contends the islands were populated illegally.

Milei, who describes himself as an "anarcho-capitalist," initially sought warmer ties with Britain, drawing criticism from nationalist opponents for his conciliatory approach and professed admiration for Margaret Thatcher, the wartime British prime minister. The 1982 conflict, which began when Argentina's military dictatorship invaded the islands, killed 649 Argentine troops, 255 British service members and three islanders.

Milei has adopted an increasingly confrontational stance as oil production near the islands approaches its anticipated start in 2028. US President Donald Trump, a close ally, has suggested he could reconsider Washington's longstanding neutrality in the dispute.

Last week, Milei devoted a substantial portion of his UN General Assembly speech to Argentina's sovereignty claim, accusing the international body of neglecting the conflict and denouncing the oil project as an illegal exploitation of Argentine resources. He has threatened sanctions against companies involved and sent Congress legislation proposing prison terms of up to 20 years for extracting resources around the islands without Argentine authorization. The bill would also extend penalties to fishing, the mainstay of the islands' economy. An Argentine judge this month ordered a halt to work on Sea Lion pending an environmental review, though enforcement remains unlikely.

Critics accuse Milei of using the sovereignty claim — one of the few causes that cuts across the country's stark political divisions — to shore up public support ahead of next year's presidential election as his approval ratings slide and the economy falters.