Editing Legio I Adiutrix (section)

==Legio I Adiutrix Pia Fidelis==
Following the murder of Domitian in 96, the ''Adiutrix'', along with the Danubian army, played an important role in Roman politics, forcing [[Nerva]] to adopt [[Trajan]] as his successor. When Trajan became emperor, he gave the legion the cognomen '''''[[Pia Fidelis]]''''' ("loyal and faithful") to acknowledge their support.<ref>''ILS'' 1029, 1061, etc.</ref> Between 101 and 106, under the new emperor's command, I ''Adiutrix'', along with [[Legio IV Flavia Felix|IV ''Flavia Felix'']] and [[Legio XIII Gemina|XIII ''Gemina'']], [[Trajan's Dacian Wars|conquered Dacia]] and occupied the [[Dacia (Roman province)|newly formed province]]. Trajan also used his ''Pia Fidelis'' in the [[Trajan's Parthian campaign|campaign against Parthia]] (115&ndash;117), but they were sent back to Pannonia by his successor emperor [[Hadrian]], with base in Brigetio.

During the next decades, I ''Adiutrix'' remained in the Danube frontier. Under [[Marcus Aurelius]], I ''Adiutrix'' fought the [[Marcomannic Wars|war against Marcomanni]] commanded by [[Marcus Valerius Maximianus]]. Between 171 and 175, the commander was [[Pertinax]], emperor for a brief period in 193. When [[Septimius Severus]] became emperor, I ''Adiutrix'' was among his supporters, following him in the march for Rome.

In the next decades, the main base was again Pannonia, but they played a part in several Parthian wars, namely the campaigns of 195 and [[Battle of Ctesiphon (198)|197&ndash;198]] of Septimius Severus, [[Parthian war of Caracalla|215&ndash;217]] led by [[Caracalla]] and 244 by [[Gordian III]].

It (probably vexilationes of it) took part in the [[battle of Mediolanum]].

The legion received the cognomen '''''Pia Fidelis Bis''''' ("twice loyal and faithful") and '''''Constans''''' ("reliable"), sometime in the 3rd century.