I've been playing for the last 3 months, and it's been a lot of fun.
There is basically a huge world war, with America, Canada, Spain, Greece, Romania, Croatia (+ more) vs. Hungary, Indonesia and Russia.
It was just a few weeks ago that Russia was one battle from conquering
ALL of America.
It's an addicting game that starts out super boring (since you can't do anything for the first 5 days essentially). After that, there is military and political strategy that is very engrossing. I'm in the Mobile Infantry and we deploy all over the world to fight in resistance wars.
Here is my referral link if anyone wants to join (joining under me gets me 5 gold when you hit level 6. I'll also be your friend and help you succeed).
http://www.erepublik.com/en/referrer/Herr+Vootsman