That's funny. I'm American, and I'd heard of the Falklands prior to the war. We had been told, in a physics class, about the first battle of the Falklands and how the British had to correct for Southern Hemisphere coriolis effects manually by scratching new lines into their sights (which only had northern hemisphere corrections).
The other funny thing is - that story may not even be true! There are no good historical references to this; plus it's not like the British in WWI were exactly strangers to the seas below the equator... But in any case I already knew where the Falklands were located as the rhetoric heated up.