That was in the 1830s, some 250 years after it was first discovered. The French were the first to settle there, in the 1700s and then the Brit, one year later, claimed it as British Sovereign Territoty. The Spanish followed, and after some toing and fro-ing there was a joint agreement in place between Spain and Britain (France left and had no interest).
Where the hell did youo get that from?
I'm sure they will remain British now because of any potential oil to be had, but they shouldn't be, the reason there are British people there now, is because the Argentition people were evicted.
Just look at a map how they can be classed as British is a joke, it's like the isle of wight belonging to Argentina
Cheers
David
History of the Falkland Islands, look it up
The claims of ownership by the Argentinians are based on a Pope, considered to be one of the most corrupt in history, giving the land to the Spanish - but the land was not even the Pope's to give away. They also use the same argument for claiming Antartica. When the 1982 Falklands war kicked off in 82 it was seen by many as a desperate attempt of the military dictatorship to cling on to power.
It's all quite complicated - but the Falklands do not belong to Argentina. The only reason they give a damn is the oil.