The article discusses four fragments of inscribed bronze tablets from the Notranjska region. The inscription on the fragment from Gradišče above Gornja Košana names the ethnic group Batavi, possibly referencing an auxiliary military unit (ala or cohort of Batavi) as part of a military diploma. The fragments from Gradišče at Čepna and from an unknown site in Notranjska may also be parts of military diplomas, whereas the fragment from Gradišče above Knežak belonged to a different type of inscribed tablet. The four finds provide further evidence that life in these prehistoric hillforts continued into the Roman period, while the presumed military diplomas also raise intriguing questions concerning the recruitment of auxiliary units and the return of veterans following discharge from service in the Roman army.