And there was a man named Francisco Moreno who explored the area and was able to use his knowledge to resolve border disputes about some of those edge cases in

And there was a man named Francisco Moreno who explored the area and was able to use his knowledge to resolve border disputes about some of those edge cases in favor of Argentina, making him something of a national hero. Argentina's most famous glacier is named after him: https://en.wikipedia.org/wiki/Perito_Moreno_Glacier https://en.wikipedia.org/wiki/Perito_Moreno_Glacier