Argentina has announced that it will investigate and sanction oil companies working near the Falkland Islands without authorisation, after President Javier Milei said the “winds of change” favour his country’s claim to the archipelago. Britain and Argentina fought a 10-week war in 1982 over the South Atlantic islands, a British overseas territory that Argentines call Las Malvinas. Argentina’s presidency said in a statement on Friday that it had ordered the opening of proceedings to “investigate...