Legio IV Flavia Felix

During the Batavian rebellion, the IV Macedonica fought for Vespasian, but the emperor distrusted his men, probably because they had supported Vitellius two years before.

Therefore IV Macedonica was disbanded, and a new Fourth legion, called Flavian Felix was levied by the emperor, who gave the legio his nomen, Flavia.

IV Flavia Felix was camped in Burnum, Dalmatia (modern Kistanje), where it replaced XI Claudia.

This suggests that a subunit replaced II Adiutrix during its absence during the wars of Lucius Verus against the Parthian empire (162-166).

After the death of Pertinax, the IV Flavia Felix supported Septimius Severus against usurpers Pescennius Niger and Clodius Albinus.

Map of the Roman empire in AD 125, under emperor Hadrian , showing the Legio IV Flavia Felix , stationed on the Danube river at Singidunum (Belgrade, Serbia), in Moesia Superior province, from AD 82 until the 5th century
Antoninianus minted under Carausius . On the reverse, the lion, symbol of the legion, and the legend LEG IIII FL .
Brick lec iiii f f stamp of IV Flavia Felix from the Castra of Aradul Nou , Romania