It took a World Cup to transform a remote cluster of islands that's home to more sheep than people into a cultural juggernaut.

A decision by Argentina's players to unfurl a banner about the disputed Falkland Islands after defeating England in the World Cup semifinals carried a historical cause onto the T-shirts, bedroom walls and Instagram feeds of a new generation. In the weeks since, the image that has endured from the tournament in soccer-crazed Argentina hasn't been of Lionel Messi. It's been the crudely painted sign reading: "The Malvinas are Argentine."