Check out
http://tinyurl.com/lhxld7
pp. 11-14
on Frankish origins.
I think it is remarkable that all the armies on the border to Germania rebelled at the death of Augustus. Was the Sarmatization of the weapons and organization of the Roman army on the Limes also a Sarmatization in terms of personnel? That would make sense of the Frankish chroniclers' claim of a journey from (Yazygian) Pannonia; they moved as troops within the Roman standing army on the Limes.
Torsten