Which preposition to use with teutones

by Occurrences 1%

Of that enemy a trial had been made within our fathers' recollection, when, on the defeat of the Cimbri and Teutones by Caius Marius, the army was regarded as having deserved no less praise than their commander himself.

in Occurrences 1%

[Sidenote: Beaten back by Celtiberi, they are joined by the Teutones in South Gaul.]

Which preposition to use with  teutones