When Argentina invaded the Falkland Islands, 30 years ago this week, they got 4,700 square miles of land in the South Atlantic inhabited by British sheep farmers driving Land Rovers on the left. A few days after the Argentinian flag was raised over Government House on April 2, 1982, traffic was redirected to the right, in keeping with Argentina’s rule of the road, and arrows were painted on local roads to mark the new driving side. As this period photo of a Land Rover shows, the locals weren’t amused and kept driving on the left when the Argentines weren’t looking. A little over two months later, a British task force retook the islands and the arrows were removed.