Interesting study in the news this week based on 200 skeletons from five sites in 5th century Pannonia, a frontier province of the Roman Empire now in Hungary. Cambridge archaeologist Susanne Hakenbeck and her colleagues studied the trace elements in the bones, which provide clues as to where people grew up and what they ate. They found great diversity in their sample. Some of the people seemed to have eaten a meat-heavy nomad diet, others a peasant, cereal-based diet. A majority had elemental signatures matching the place they were buried, but others had very different signatures suggesting that they grew up far away. In terms of grave goods and burial style, the graves were much more consistent and much more in keeping with local habits.
Their conclusion is that this was a population in flux, with many people moving around and some entering the population from far away. They chose to focus on Pannonia both because ancient written sources suggest it was an area of intense conflict and much population change, and because the Hungarian plain is ecologically suitable for both agriculture and pastoralism, which have at times existed side-by-side there. It seems that they probably did so in the fifth century.
New stories about this find are playing up a weird "Huns were not barbarians" angle that I don't really understand. Just because different kinds of people coexisted doesn't mean they did so peacefully; in fact the written history and other archaeological evidence (e.g., the many buried treasures) both show that they experienced very high levels of violence. Still, they did coexist.
So I would say that this bone chemistry is another piece of evidence that the fifth century really was a "time of wandering" as the old historians had it, with many thousands of people in motion across thousands of miles. All that movement and mixing had effects in many small, ordinary places, where suddenly your neighbors might be members of a strange barbarian tribe, burying their own dead in the same cemeteries where your grandparents lay.