Argentina threatens UK with international legal action over Falkland Islands oil exploration

In a major update, Argentina has escalated its decades-long sovereignty dispute with the United Kingdom, giving London a strict two-week ultimatum to halt offshore oil exploration near the Falkland Islands.

Shifting the political dynamic, Argentine President Javier Milei announced that his administration has instructed legal teams and the Foreign Ministry to prepare arbitration proceedings under the United Nations Convention on the Law of the Sea (UNCLOS).

At the center of the diplomatic flare-up is the multi-billion-dollar Sea Lion oil project in the North Falkland Basin.

Buenos Aires has fiercely condemned the venture, characterizing the extraction of natural resources in the disputed waters as an illegal exploitation of sovereign territory.

Milei stated that if the United Kingdom fails to comply within the 14-day window, Argentina will formally petition the International Tribunal for the Law of the Sea (ITLOS) for provisional measures.

The move marks a sharper, legally aggressive tack by the current Argentine government following frustrations with international bodies.

Meanwhile, London has consistently maintained that the Falkland Islands government holds the sovereign right to develop its own natural resources for economic benefit, setting the stage for a high-stakes legal showdown between the two nations over the South Atlantic energy reserves.