Question

what advantage did the germanic tribes have in their conflict with the roman empire during the 3rd to 5th centuries A.D.

Answer 1

Another answer: Nearly every German male was a trained warrior.

Answer 2

The main advantage which the germanic tribes had in their conflict against the Roman Empire at teh time during the 3rdr and 5th century was that they were very motivated to defend their own lands which were invaded by the Romans. They also knew the terrain and felt comfortable being there.