Roman battlefield found deep inside Germany

[L C Cinna]

Couldn't this be the wars of Marcus Aurelius in Germany?

I just can't imagine anyone going so far as to invade Germany in the 3rd century when their own reigns were falling apart.

1st the area is completely off from where Marcus' campaigned (Bohemia)

2nd a coin of Commodus was found so it has to be post Antonine periode.

My first guess was Maximinus Thrax but might be any other as well.

It's not that the empire was constantly falling apart during the 3rd century :?

Literature mentiones at least Maximinus, Gallienus and Maximianus campaining beyond the Rhine in the 3rd century (not sure if any others are mentioned but I think Carinus wasn't inactive as well)