for now I know only a few medlas but there are medlas I don't know how to get them...
Wounded in Action - post 5 defeats (Retire not count)
Capitan - 15 games
fleet capitan - 25 games
commodore - 35 games
Rear Admiral - 45 games
Vice Admiral - 55 games
Admiral - 100 + games (according to Rallos-Zek's medals)
the medals that are above Wounded in Action,
and write what you want...