Lol, i guess German history is a very resourceful place to generate a lot of civilizations. i think no other people can say to have formed so many civs, that were unified to spilt it up again... only to name the most important names: well we wave the Angles & Saxons, Bavarians, Goths, the Alamanni, Lombards, then there comes Francia, the Holy Roman Empire succeded by Swiss, Netherlands, Prussia, Austria yet again partially united itno Germany (or the 3rd Reich) to be divided again forming the west germany FRG and the east GDR only to be unified again... to be continued? EU? hmm thinking of it it would unify the Anglo Saxian lands, with former Francian France, the German core lands, Prussians eastern territories, the Lobardian takeover of north Italy.. would be a fine ending i guess.
each one of this can be called a civilization with it's own distinct history while they are all german in a way. anyway i don't think there are many countries with such a vivid past, hehe.