When the XXIst was lost, in 92, the XIV Gemina was sent in Pannonia to substitute it, camping in Vindobona (Vienna). After a war with the Sarmatians and TrajanDacian Wars (101-106), the legion was moved to Carnuntum, where it stayed for three centuries. Some subunits of the XIVth fought in the wars against the Mauri, under Antoninus Pius, and the legion partecipated to the Parthian campaign of Emperor Lucius Verus. During his war against the Marcomanni, Emperor Marcus Aurelius based his headquarters in Carnuntum.
In support of Septimius Severus
In 193, after the death of Pertinax, the commander of the XIVth, Septimius Severus, was acclaimed emperor by the Pannonian legions, and above all by his own. The XIV Gemina fought for its emperor in his march to Rome to attack usurper Didius Julianus (193), contributed to the defeat of the usurper Pescennius Niger (194), and probably fought in the Parthian campaign that ended with the sack of the capital of the empire, Ctesiphon (198).
In support of imperial candidates
In the turmoil following the defeat of Valerian, the XIV Gemina supported usurper Regalianus against Emperor Gallienus (260), then Gallienus against Postumus of the Gallic empire (earning the title VI Pia VI Fidelis — "six times faithful, six times loyal"), and, after Gallienus death, Gallic Emperor Victorinus (269-271).
The end of the unit
At the beginning of the 5th century, XIV Gemina still stayed at Carnuntum. It probably dissolved with the collapse of the Danube frontier in 430s. The Notitia Dignitatum lists a Quartodecimanicomitatensis unit under the Magister Militum per Thracias; it is possible that this unit is XIV Gemina.
