Bosporan War under Diocletian?

[Nathan Ross]

the men stationed there were from Legio XI Claudia in the late 5th cenutry, if I recall correctly.

There are inscriptions from the 3rd-4th century from Cherson, Olba, Charax and other places naming legions I Italica and II Herculia, plus V Macedonia and XI Claudia and a couple of auxiliary cohorts. So it seems there was a garrison there, from the mid 3rd century at least, drawn from the Moesian and Scythian armies. Interesting that they remained there into the 5th century!