Legio XI Claudia
|Legio XI Claudia|
Map of the Roman empire in AD 125, under emperor Hadrian, showing the LEGIO XI CLAUDIA, stationed on the river Danube at Durostorum (Silistra, Bulgaria), in Moesia Inferior province, from AD 104 until the 5th century
|Active||58 BC to sometime in the 5th century|
|Country||Roman Republic and Roman Empire|
|Type||Roman legion (Marian)|
|Role||Infantry (some cavalry support)|
|Size||Varied over unit lifetime.|
|Garrison/HQ||Burnum, Dalmatia (9-70)
Vindonissa, Germania Superior (70-101)
Brigetio, Pannonia Inferior (101-104)
Durostorum, Moesia Inferior (104-5th century)
|Nickname||Claudia Pia Fidelis
Pia V Fidelis V
Pia VI Fidelis VI
|Mascot||Neptune, she-wolf lactating the twins|
-Against the Nervians
Caesar's civil war
Liberators' civil war
Antony's civil war
Bar Kokhba's revolt
Vexillationes of the 11th participated in many other campaigns.
Legio undecima Claudia (Eleventh Claudian legion) was a Roman legion. XI Claudia dates back to the two legions (the other was the XIIth) recruited by Julius Caesar to invade Gallia in 58 BC, and it existed at least until early 5th century, guarding lower Danube in Durostorum (modern Silistra, Bulgaria). The emblem of this legion is not recorded; it could have been, as well as of all Caesar's legions, the bull, possibly the she-wolf lactating the twins.
The caesarean Legio XI
The XI and XII legions were levied by Caesar for his Helvetii campaign in 58 BC. The legion fought in the Battle against the Nervians, and probably fought at the Siege of Alesia too. During the civil war, the Eleventh legion fought for Caesar at the Battle of Dyrrhachium and at Pharsalus. The legion was disbanded in 45 BC, and its veterans were offered lands at Bojano, which received the name of Bovianum Undecumanorum, "Bovianum of the members of the eleventh".
Following Augustus' rise to power
The XIth was reconstituted in 42 BC by Augustus (at the time known as Octavian), to fight in the civil war against the assassins of Caesar. The XIth fought in the Battle of Philippi, and was then sent back to Italy to quell a revolt at Perugia. It was probably involved in the fight against Sextus Pompeius, who had seized Sicilia.
The Eleventh was sent to the Balkans, but after the major defeat at the Battle of Teutoburg Forest (AD 9), Augustus redistributed the legions on the Northern frontier, sending the XIth at Burnum, Dalmatia (modern Kistanje), together with the VIIth.
Second half of 1st century
In 42, the governor of Dalmatia, Lucius Arruntius Camillus Scribonianus, revolted against Emperor Claudius. The Eleventh and the Seventh sided with the Emperor, and put down Scribonianus' rebellion. Claudius awarded each of the two loyal legions with the title Claudia Pia Fidelis.
In the Year of the Four Emperors (69), the XI, the VII (which had moved from Burnum in 58) and the XIV Gemina sided with Otho. A subunit of the Eleventh moved to participate to the Battle of Cremona between Otho and his opponent Vitellius, but arrived late on the battlefield, and was sent back to Dalmatia by the victorious Vitellius. When the commander of the Eastern army, Vespasian, claimed the purple, the XIth sided with him, fighting in the Second Battle of Bedriacum, which marked the beginning of the rule of Emperor Vespasian.
The following year, 70, Claudia was led by Cerialis to quell with the Batavian rebellion; after the rebellion was put down, the Claudia was moved to Vindonissa, in the province of Germania Superior, to replace XXI Rapax, while IIII Flavia Felix moved to Burnum.
In 101 XI Claudia moved to Brigetio, Pannonia Inferior, in occasion of the Dacian Wars of Trajan (101-106). In 104, the legion is in Durostorum, Moesia Inferior, to guard the Danubian frontier, and will remain there for the following centuries. The legion was responsible, with the other Moesian legions (I Italica and V Macedonica), for the protection of the Roman-allied Greek colonies of Crimea. The legion is attested togher with legion I Italica at the castra of Drajna de Sus. 
In 193, after the assassination of Pertinax, several claimant for the purple raised; among these there was the governor of Pannonia Superior, Septimius Severus, who gained the support of the XIth. The Claudia did not take part in Septimius' march on Rome, but fought with Severus, together with I Italica, against his rival Pescennius Niger. Severus besieged Byzantium, crossed the Gülek Pass(Cilician Gates), and defeated Niger at the Battle of Issus. It is possible that XI Claudia fought also during the Parthian campaign of Emperor Severus, conquering the Parthian capital of Ctesiphon (198).
3rd century and beyond
During the clash between Emperor Gallienus and the Emperor of the Gallic Empire Postumus, XI Claudia fought for the first, receiving the titles Pia V Fidelis V and Pia VI Fidelis VI ("Five/Six times faithful and loyal").
- Vlădescu, Cristian M. & Co. (1992). "Archaeological Excavation Report". CIMEC. Retrieved 2013-05-04.
- Lendering, Jona, "Legio XI Claudia Pia Fidelis", at Livius, livius.org.