The Legio II Flavia Constantia (reliable Flavian legion) was a comitatensis Roman legion, created by Diocletian, probably in the year 296 or 297 . II Flavia Constantia was formed together with I Maximiana to garrison the newly created province Thebaid which became part of the new diocese of Aegyptus. this province faced south against the enemies the Romans, such as the Nubians, Kush, Meroe and Axum. The name of the legion is related to Constantius Chlorus, who was one of the four emperors at the time of the tetrarchs.