Argentine President Javier Milei used his address to the UN General Assembly in New York on Wednesday to escalate his country's long-running dispute with Britain over the Falkland Islands, warning that Argentina would take "matters into our own hands" and branding the United Nations itself a "useless organisation whose only purpose is to sustain a cast of faintly arrogant parasites masquerading as well-intentioned bureaucrats." He closed his speech with a vulgar exclamation — "Viva la libertad, carajo!" (Long live freedom, damn it!) — a signature flourish he has used at previous international appearances.

At the heart of Milei's remarks was Argentina's opposition to the Sea Lion project, a major offshore oil development in the North Falkland Basin operated as a joint venture between an Israel-based energy company and a London-listed oil and gas firm. Milei described the exploitation of resources in the area as an "unlawful act" and accused the UK of violating a 1976 UN resolution calling on both sides to refrain from unilateral action while the sovereignty dispute remains unresolved. His government has in recent weeks launched administrative and criminal proceedings against more than 60 companies and individuals linked to the project, and has submitted legislation to Argentina's congress aimed at protecting what Buenos Aires regards as its sovereign rights. No penalties have yet been applied and none of the allegations has been proven.

The Falkland Islands — known in Argentina as the Malvinas — are a British overseas territory in the South Atlantic with a population that voted 99.8% in favour of remaining British in a 2013 referendum, on a turnout of 92%, with independent observers present from Canada, the United States, New Zealand, Uruguay, Chile and Brazil. Argentina contests the legitimacy of that vote, with Milei arguing that the principle of self-determination cannot apply because "the population was implanted by the occupying power on a territory whose sovereignty is in dispute." The two countries fought a 74-day war over the islands in 1982, after an Argentine invasion, which ended with the surrender of Argentine forces at a cost of more than 900 lives on both sides.

Britain responded swiftly, submitting a formal written statement to the UN General Assembly record — the same procedure London used in 2012 in response to then-president Cristina Fernández de Kirchner. The statement declared that the UK has "no doubt" about its sovereignty over the Falklands, South Georgia and the South Sandwich Islands, and described Argentina's conduct as "wholly incompatible with the principles established in the United Nations Charter" and "not the behaviour we expect of a democracy." The document rebutted Milei's legal arguments point by point, asserting that UN resolutions do not prohibit economic development or override the islanders' right to self-determination, and that Argentina's efforts to sanction international companies amount to an "unacceptable attempt to exercise extra-territorial jurisdiction" with no basis in international law.

The episode comes at a diplomatically sensitive moment. Earlier this month, US President Donald Trump indicated he was reviewing Washington's traditionally neutral position on the Falklands — a signal that emboldened Buenos Aires. In response, British Prime Minister Andy Burnham, who addressed the assembly the day before Milei, said he had raised the issue directly with Trump, stating: "We will stand firm in the face of any threats. We will defend the right of the Falkland Islanders to self-determination and to remain British." The flurry of statements over 48 hours at the UN underscores how a dispute that many had considered frozen is once again generating real diplomatic friction, with the prospect of sustained Argentine economic pressure on international energy companies now a concrete policy rather than a rhetorical stance.