This is litterally retarded.
This is a map of the southern cone.
This is a map of south america
Argentina right now is a land power, the UK is a naval power. The UK is in alliance with several other countries if your trying to expand then the Falklands gives you a maximum amount of power for a very tiny amount of land. And if you do go after them the UK is in alliance with several other countries and your facing them in their feild of strength. Its a waste of fucking resources.
If you want to expand and get maximum amount of gain you don't go up against the UK you go up against Chile.
Why? Tierra del Fuego, to be more exact Isla Grande de Teirra del Feugo. If you control the entirety of that island you control over 1800 square miles of land, you control the strait of magelian one of the more important straits in the world, your able to dominate shipping pasting the cape horn. You do a little bit of expansion in the direct south on top of taking that critical island and you now have full access to both pacific and atlantic trade and brother that is one hell of an edge.
On top of this you have a natural ally to fight Chile with and thats Bolivia a country that desperately wants access to the sea. You form links they attack from the north you attack from the south. Between the two countries you have what you need to make Santago come to terms.
The Bolivians get their coridor, and you walk away with access to two oceans, control over a very important stragic strait, and a much larger influance over all trade around the southern cone. This gets you more land, more influence and more money, and its a winnable fight.
Instead Argentina decides to piss away men, money and blood on a high risk low reward senerio.
Fucking stupid.