How did the germanic tribes of europe affect the roman empire ?

Question: How did the germanic tribes of europe affect the roman empire !?
Best Answer - Chosen by Asker:

they were initially viewed as a threat!. then they were viewed as easy and plentiful additions to a strained military!. then they moved in and everyone started speaking germanic languages, started dressing like germans, adopted germanic style politics!.Www@QuestionHome@Com