The Germans annihilated three Roman legions in southern Germany early in the first century. More likely that the artifacts found was booty traded by the Germans to people living in the area where they were found. There is no record of Romans reaching that area with military force. However Romanized Germans may have traded with the locals.
“Solidi found at Gaski”
These are late Roman, post-Constantine (note the cross on the coin on the right).
Just as likely the possessions of a retired German auxiliary of the Roman army. Quite early in Imperial times the majority of soldiers on the frontiers were non-Roman auxiliaries.
No, actually, your interpretation is just flat-out wrong. The fact is, the Romans returned to the area east of the Rhine, hunted down Arminius, and he pissed his drawers as he dropped his weapons and ran back into the barbarian wilds. With a few years, his relatives sold his head to the Romans. In recent years a rescue dig in Copenhagen, Denmark turned up, not a medieval or dark ages cemetery, but a Roman one. Roman finds continually turn up farther east, this being the most recent such finding.
Velleius Paterculus, a contemporary Roman historian, explained Varus' mistake: he thought that because the Germans had human shape and human voices, that they were human.
A little bitter, it appears.
Was the 9th legion among them?
That is also what I was thinking. The presence of Roman military artifacts does not necessarily mean there were Roman military personnel.