Anreppen

An archaeological association for Westphalia-Lippe is arguing for Romans in the Rhineland. That wouldn't be news except... the subwatershed would be the Lippe. The "Anreppen" site is Delbrück just downstream of Paderborn. This isn't just on the wrong side of the limes but far on that side.

And it's not from Varus' tenure, when the Anreppen camp proper; nor even Germanicus'. They're going with the AD second to third centuries: Antonines through Severans (I doubt much past them). The locals would have been Chatti by then, German-speaking. Later, Allemani and Cenni.

An important event around this time would be the Marcomannic War, further southeast along the Danube; the Chatti came along for that ride. In AD 170, the Chatti opened a new front through their own river, on their own. The Chatti lost that one, and maybe even lost their existence. After a generation or two, in AD 213 we next hear from the Allemani in this area - when they asked for Roman help. Caracalla provided that "help", first slaughtering insufficiently-enthusiastic Allemani before attacking the Cenni. This campaign went better, overall, for the locals, as Caracalla paid off the survivors to leave Rome alone. Next up was Severus Alexander who died miserably in a mutiny, followed by Maximinus Thrax; one of these two fought and beat some specie of Alleman at the Harzhorn even further-east.

As for Anreppen II: excavated so far are a well, farms, and cottage-industries like weaving. The Roman imports include a gemstone of Mercury - they think it's a signet - and an iron knife in the Roman style. Mercury is here in his capacity as merchant.

At this time the Romans took interest in the Lippe, which included a financial interest. This merchant compound/village might just have been a "friendly". But it may be that, at times, the Romans went as far as to fortify an embassy; as they did at Drumanagh in Ireland, and in the Yemen.