I got two in the first game i played. And I played badly. I was the french (commercial industrious) and avoided most wars. The first one was a musketeer fighting some weak lousy unit, and the second was a cavalry, again fighting some weak lousy unit.
The next time round I played the Germans (mil, sci) (very well, to toot my own horn), and got absolutely zilch, despite annhiliating (I can never get that word right) two civs singlehanded and beating a third one up quite badly.
MAJOR BUMMER