That’s right. Here’s the site for that find: http://www.roemerschlachtamharzhorn.de
Site says that the Romans used to clear up after battles (collecting missiles, swords etc. for re-use) and the fact that archeologists found so much means the Romans were in a haste. They speculate the Romans might have suspected more trouble brewing.
He probably had to hustle down to Rome to defend his claim, and of course, he didn’t make it. :’)