BUENOS AIRES, September 3, 2026. – President Javier Milei announced a new offensive to reinforce Argentina’s sovereignty claim over the Malvinas, combining tougher sanctions against companies involved in offshore oil exploration with a major expansion of Argentina’s strategic and defence capabilities in the country’s far south.

In a nationally televised address on Thursday, Milei said Argentina’s sovereignty faces a “concrete and urgent danger” and announced a package of measures aimed at responding to what his government considers the unilateral exploitation of natural resources in the Malvinas.

One of the central measures is a presidential decree designed to accelerate sanctions against companies involved in hydrocarbon exploration and exploitation in the islands without Argentine authorization. Milei also announced that his government will send Congress a bill to strengthen the existing legal framework and increase the consequences for companies participating in such activities.

The measures are particularly significant because of the development of Sea Lion, an offshore oil project in the North Falkland Basin, involving Rockhopper Exploration and Navitas Petroleum. Buenos Aires considers the development of hydrocarbons in the area to be unauthorized exploitation of Argentine natural resources.

Milei said the government intends to extend the scope of its response beyond companies directly involved in oil production, potentially including businesses providing technical assistance, logistics, infrastructure or other services to projects considered illegal by Argentina.

The initiative builds on Law 26.659, Argentina’s existing legal framework governing hydrocarbon exploration and exploitation on the continental shelf. The government now seeks to accelerate and strengthen the sanctions mechanisms available under that legislation.

A new strategic base in Tierra del Fuego

Milei also announced a presidential decree to increase resources for the Ministry of Defence, with the priority of building an Integrated Naval Base in Tierra del Fuego and strengthening Argentina’s communications capabilities.

The government says the project is intended to reinforce Argentina’s strategic position in the South Atlantic and transform Tierra del Fuego into a major logistical hub for the region. The measure is part of a broader plan that includes greater protection of critical infrastructure and stronger maritime and aerospace capabilities.

The announcement gives the Malvinas dispute a broader strategic dimension, connecting sovereignty with energy resources, maritime security, logistics and Argentina’s presence in the South Atlantic.

Trump adds uncertainty to the British position

Milei’s announcement came on the same day that Donald Trump made remarks that could further complicate the diplomatic landscape surrounding the Malvinas.

In an interview with British broadcaster GB News, Trump declined to give an unequivocal commitment that the United States would support the United Kingdom in a future conflict with Argentina over the islands.

Trump linked his position to Britain’s role in the war with Iran, criticizing London for what he described as a lack of military assistance to the United States.

The U.S. president argued that Britain had not been sufficiently supportive during the conflict and referred specifically to the strategic importance of the Strait of Hormuz, through which Britain obtains energy supplies. Trump questioned why the United Kingdom had not provided greater naval assistance to the United States.

Asked about a possible future conflict over the Malvinas, Trump recalled the 1982 war but stopped short of reaffirming Washington’s traditional position regarding Britain.

The comments follow Trump’s statement earlier this week that he was “reviewing” the U.S. position on the sovereignty dispute, generating intense attention in Argentina and Britain.

For Milei, Trump's remarks come at a strategically significant moment. The Argentine president has repeatedly emphasized the importance of his relationship with Washington and has argued that closer ties with the United States could help Argentina advance its long-term objective of recovering sovereignty over the Malvinas through diplomatic means.

The British government, however, continues to maintain its sovereignty over the islands.

Oil moves to the centre of the dispute

The growing importance of offshore hydrocarbons has added a powerful economic dimension to the longstanding sovereignty dispute.

Argentina's government says it will use diplomatic, economic, judicial and legal instruments to discourage companies and governments from supporting oil and natural-resource projects in the Malvinas.

According to Argentine government figures cited following Milei’s announcement, the Foreign Ministry has sent approximately 180 diplomatic notes to companies and more than 29 countries connected to activities involving the islands.

Milei's strategy therefore combines pressure on the companies involved in offshore oil development with a stronger Argentine presence in Tierra del Fuego and renewed diplomatic efforts over sovereignty.

The developments also come as the United States and United Kingdom face tensions over defence spending, NATO commitments and Britain's role in the conflict with Iran.

For Argentina, the Malvinas issue is increasingly being framed not only as a historical sovereignty dispute but also as a question involving energy resources, maritime security, logistics and the geopolitical future of the South Atlantic.