But duh... I could have conquered on the continents... but there were more than one. I didn't even think of that. So I just played a Pangea with the same set up... ended up going war monger... took over the world and couldn't get the achievement because stupid Mongolia only had one city... I was tempted to lose it on purpose just for the achievement, but pride got in the way.
Most fun war game I've had. First time I have been nuked. That was fun.