In terms of population it would like the US against Albania.
I think the U.S. vs. Denmark is a better example.
Seriously, Sarkastic Empire vs. Vatican would be a lot more interesting battle...
And as I heard, 9000 of Nauruans are in refugee camps so it's a case of 600+CFCers vs. 1000. The refugees would take the side of the side to provide them a better life.Again, Nauru has a population of 10,000, Sark has a pop of 600. So unless they're shockingly well trained, I don't like their odds.