Location of the Frigidus River

[Tormenta]

Bela seems like a Slavic name to me (meaning 'white')?

Yes, it's true. Bela is more a stream going down from the mountains.

I do. Both routes have narrow defiles, but I agree that such a descrition would fit better with a battle at the southern end of the Vipava valley. Nevertheless, this was quite a large battle, and parts of it could have taken place miles apart. And since both routes meet south of Ajdovščina/Castra, I think it remains possible, whichever of the 2 routes favoured, that a main battle took place on the banks of the Vipava river, south of Ajdovščina/Castra. I would not bet on any remains, because rivers like these often burst their banks and change course across the whole valley floor.

I agree on most things. Vipava river seem calm and slow, but almost every year floods(last year was quite serious). The valley is undergoing "heavy" farming, because of it fertile soil and it's Mediterranean climate, for centuries.

Last month in Miren(still in the valley, close to the Italian border the archaeologists found a few graves of Eastern Goths, but they are from 6. c. Maybe they will have more luck next time.

Next year(hope) will be out a collection of papers about Roman army in Slovenia, lectures from last month meeting about the same subject organized by the National museum and Science academy of Slovenia(they promised a English translation, but is on the authors to do it, so it will take some time, at at last in my case). It should have an article on Ad Pirum, when the fort(or one of the towers) was burned down and rebuild, maybe this will help understand the situation in that times. It also should have some more articles on Claustra Alpium Iuliarum.