here are the rules. choose a famous empire that fits on the RTW map. for example the roman empire. instead of playing the romans you're going to play the germans. with those germans you're going to immitate the roman empire. so you win when you've immitated the roman borders (as best as possible).

here a few famous empires

Roman Empire (west an/or east)
alexanders empire
carthaginian empire
sassanid empire (rtr only)

but also the 3rd reich
modern day france
sovjet union and more