NATO would setup in if UK really need the help. There's not a single military power in this world right now that can really counterbalance the USN's 11 Supercarriers.

You also have to take into consideration of the RN's 2 new super carriers. Once they're in operation, the RN would be formidable again.

The Commonwealth has 54 member countires VS the USAN which has 12.

The Commonwelth has 2 of the worlds largest economies (G8) Vs the USAN which has no members of the G8.

If any member attacks the Falkland islands, that would invoke Article 5 of the NATO Charter, "An attack on any member shall be considered to be an attack on all"

So yeah, i would love to see Argentina start a war with the UK, they would get pummled just like they did in 1982. Would make for intersting TV.

I do not want to get NATO involved. I just want to see how those two organizations would fight each other.

Somebody has way too much time on their hands.

It's Argentina, dude. Of course they'd lose. Again. 

Mhm. I don't think Colombia would get into that mess. Our army is busy enough fighting a civil war. And, let's face it, the Colombian army is among the best in this part of the world. Fighting the guerrillas for more than 40 years really helps. And, since we get a lot of economical help from the US, I don't think we'd want to get involved.

Venezuela is a whole different story, though. Their president is anti-imperialist to the bone, so he would go head on. The Venezuelan military isn't as big or well trained as the Colombian military, but they've gotten some pretty cool **** they bought from Russia. 

I don't know about the other countries.  I believe one of the decisive factors would be Brazil, as they are the strongest country in South America.

Well he is just assuming that all happens Carrot.

Hmm the Canadians, Aussies, Kiwis etc. will be helping Britain. What could they do? India could provide a lot of manpower just like they did in WW2. The USAN would certainly lose.

Argentina should know better to get into a war with a Nuclear power. And the Commonwealth contains 3 nuclear powers.

If for some reason the Commonwealth became a British Empire V2.0 then it would be one sided. One sided like a gang rape.

Imagine the production, manpower and technical capabilities of all CW nations combined against the favela dwellers of South America.

Chile would also side with Britain.