Legio III Diocletiana: one of the legions of the later Roman empire. Its name is a reminder of the creator of the legion, the emperor Diocletian.
In the fourth century, it became clear that stronger forces were needed in southern Egypt, and units of III Diocletiana were sent to Thebes and Kom Ombo. During the reign of Theodosius I (378-395), northern barbarians were sent as legionaries to Egypt and served in III Diocletiana, whereas Egyptian soldiers were sent to Macedonia. They were called III Diocletiana Thebaeorum and served under the military commander of Thrace.