I am hearing again and again in history documentaries and other such sources that the Romans abandoned their territory of Raetia and Noricum. After that Germanic people flooded in and settled there.
I have been researching this a lot and did not find any evidence for the Romans retreating (even if they did officially, there would still have been a lot of people who had stayed behind to keep their land), nor any evidence that a huge Germanic immigration took place. There are a lot of things that point to the Romanized Celtic population staying and building the nobility, while perhaps some Germanic people immigrated. This gives me enough reason to doubt the common opinion I hear on the media and makes me question the sources (which I found very little of to support either side of the claim).
Since I'm sadly lacking the sources I'm asking you:
What is the currently accepted theory and what are the sources (especially things like digging sites, artifacts and first hand accounts) to this conclusion?
- Bavarians (Wikipedia) (Most information I could find, but I don't have those books that are linked as reference)
- Noricum (Wikipedia)
- Vindelici (Wikipedia)
- Raetia (Wikipedia)
- Roman Empire (Wikipedia)
- History of Bavaria (Wikipedia)
- Regensburg (Wikipedia)
- Salzburg (Wikipedia)
- Augsburg (Wikipedia)
- Limes Germanicus (Wikipedia)
- Upper Germanic-Rhaetian Limes (Wikipedia)
- Marcomannic Wars (Wikipedia)
- Alemanni (Wikipedia)
- Goths (Wikipedia)
- Theoderic the Great (Wikipeia)
- Also some books I don't know the name of anymore