Argentina has lodged a formal protest with the United Kingdom over the passage of a Royal Navy warship near the Falkland Islands, a move that has reignited tensions between the two nations. The complaint, filed in a diplomatic note on July 13 and made public shortly after Argentina's World Cup semi-final victory over England, alleges that HMS Medway conducted an "unconsulted and illegal" transit through Argentine territorial waters.

Argentine Foreign Minister Pablo Quirno stated that the presence and actions of HMS Medway, which is permanently stationed in the Falklands as the Royal Navy's guard ship, violated bilateral agreements. "In diplomacy, work is not shouted about like goals, but we are driven by the same conviction: the pride of being Argentine and the constant defence of our interests," Quirno said in a statement.

Argentina's vice president, Victoria Villarruel, had previously urged the nation to "claim what's ours" back from "the usurping pirates," setting a combative tone ahead of the high-stakes football match.

The sovereignty dispute over the Falkland Islands, which Argentina refers to as the Malvinas, dates back to a 1982 conflict. The ten-week war resulted in the deaths of 907 people, including 649 Argentines and 255 Britons, after an Argentine invasion was repelled by British forces.

Following the World Cup match, which Argentina won 2-1, some Argentine players were seen displaying a banner asserting their claim to the Falkland Islands, despite FIFA regulations against political displays. UK Secretary of State for Business and Trade Peter Kyle deemed the act "entirely inappropriate," contrasting it with England's "dignity" during the match.

Argentine President Javier Milei, while celebrating the World Cup victory, described it as "just a football match." He noted that diplomatic progress had been made, with the UN reportedly compelling the UK to engage in discussions. However, he cautioned against conflating the sporting achievement with the ongoing diplomatic efforts.

Falkland Islanders have consistently voted in favor of remaining a British Overseas Territory. A 2013 referendum saw 99.8% of voters choose to remain under British rule. Foreign Minister Quirno has also previously questioned the legitimacy of the referendum, claiming the islands' population was "artificially implanted."