From Invasion to Rebellion
In the 19th century a large number of Roman tombstones were discovered in the infill of the north wall of Chester City Walls. Initially thought to have simply been re-used as building materials as was the Roman way, it has since been noted that many of the tombstones had been badly mutilated and defaced with references to Legio XX obliterated. This legion was part of the Roman invasion force of Britain in AD 43 and fought in the Iceni Revolt of AD 60-61 and later permanently based at the legionary fortress at Chester (Deva).
The origins of the legion’s name ‘Valeria Victrix’ ("Valiant and Victorious") are uncertain and the subject of much debate; the title is generally thought to have been bestowed on Legio XX following the Iceni Revolt led by their queen Boudicca.
As the ruthless Romans war machine moved through Britain conquering all before it Legio XX transferred to Kingsholm, Usk and then Wroxeter, before campaigning in the north. The legion then formed the Chester garrison where they remained until Legio XX disappears from the historical record in the late 3rd-early 4th centuries.
Some historians argue that Legio XX was still stationed in Britain when Magnus Maximus withdrew the bulk of the British garrison in pursuit of his imperial ambitions in AD 383. Numismatic evidence certainly suggests the fortress at Chester was occupied at this time but what this occupation was has been the subject of much debate.
The legions were restructured around this time resulting in a much reduced Chester garrison. Yet the last days of Legio XX is somewhat of a mystery; the legion disappears from the historical and archaeological record at the end of the 3rd century. Legio XX is notably absent from the Notitia Dignitatum, a document containing a list of military and civilian commands in both eastern and western parts of the Roman empire from the late-4th to early-5th century.
Further, we have seen how a large number of the Legio XX tombstones from the Roman cemetery at Chester have been broken up and recycled into the north wall during repairs to the defences of the fortress. But these tombstones were not just re-used as convenient building materials: many of the inscriptions referencing Legio XX have been obliterated if not snapped off resulting in the loss of the inscription; many faces defaced beyond recognition and legionary emblems chiseled out.
Rather than using the nearest available tombstones as building material for hurried repairs to the north wall this deliberate mutilation of the funerary monuments dedicated to Legio XX must have taken effort and time. As the tombstones were used as infill for the north wall, hidden behind the facing stones, why was necessary to go to such effort to deface the stones? It appears the memory of Legio XX was purposefully removed at Chester.
This destructive treatment of the tombstones of Legio XX immediately brings to mind the Roman practice of ‘Damnatio memoriae’ (condemnation of memory), the erasure of the subject from the historical record including the destruction of depictions and the removal of names from inscriptions and documents. Without an inscription a memorial stone is meaningless. The practice was usually exercised for usurping emperors or failed conspirators.
The treatment of the legion’s tombstones at Chester suggest the legion fell from grace at a late point in its history; what could cause a once illustrious legion to become denigrated overnight?
Foundations
When and where Legio XX was founded is not known for certain yet the legion is first recorded during the reign of Augustus, also known as 'Octavian'. Gaius Octavius officially became known as Augustus in 27 BC when he was granted the title marking the beginning of his reign as the first Roman emperor and founder of the Roman Empire. Thereafter ‘Augustus’ was used as a title for all subsequent emperors.
Symbolized by the emblem of a boar, Legio XX is thought to have been established around 31 BC when the legion is recorded as fighting at the battle of Actium when Octavian defeated Mark Antony. Legio XX fought for Antony at the battle but following their defeat his troops, including Legio XX, deserted and joined Octavian's army. At the time there were two legions named "XX" which were were brought together as one unit by Octavian after Actium.
Legio XX then played a significant part in the Cantabrian Wars from 25-19 BC, the Roman conquest of Hispania. The legion was then stationed in Illyricum from AD 6 during the Great Illyrian Revolt (Bellum Batoninum) and was relocated to Germania Inferior following the massacre of three Roman legions under the command of Publius Quinctilius Varus in the Teutoburg Forest in AD 9.
Legio XX was then moved from its fortress at Novaesium (Neuss) in Germania to northern Gaul where the legions were mustering in anticipation of Caligula’s planned invasion of Britain in AD 40. The biographer Suetonius tells us that the invasion was aborted and it became known that the emperor intended to discipline Legio XX for their mutiny against his father Germanicus. Suetonius claims Caligula intended to decimate the legion, that is execute every tenth man. Caligula apparently abandoned the idea when the legionaries became aware and started to arm themselves.
Legio XX went on to play a key role in the Claudian invasion force of Britain in AD 43. Thereafter, the legion remained in the country for most of the Roman occupation which officially ended in AD 410 when Honorius, Emperor in the West, officially acknowledged that the Britons were no longer under imperial protection and should take to their own defences.
Four legions and some 20,000 auxilaries are said to have taken part in the Roman invasion of Britain under the command of Aulus Plautius, but only Vespasian’s Legio II Augusta is directly mentioned in contemporary sources. However, the four legions that made up the invasion force are generally accepted as the same four legions mentioned during the later Boudiccan revolt of AD 60-61: II Augusta, IX Hispana, XIV Gemina and XX.
Richborough in Kent is the favoured landing site of the Romans. The invasion force rapidly moved through the south-eastern corner of Britain. Then the Romans crossed the Thames and headed north to the territory of the Trinovantes who inhabited an area roughly encompassing modern Essex and southern Suffolk. They were bordered to the west by the Catuvellauni and in the north by the Iceni.
Dio tells us that the emperor Claudius joined the legions at the Thames and led them across the river where they defeated the Britons who had gathered there. Claudius then took Camulodunum (‘fortress of the war god Camulos’) the tribal capital of the Trinovantes, where he received the submission of 11 British Kings. Claudius declared the foundation of the province of Britannia, establishing Camulodunum (Colchester) as its capital with Plautius appointed as first governor.
The Roman’s now consolidated their foothold in Britain. Vespasian would lead the south-westward campaign with Legio II Augusta, Legio XI Gemina would head for the midlands while Plautius would take Legio IX Hispana north.
Legio XX remained at the newly founded Roman Colchester and constructed a legionary fortress next to the oppidum of the Trinovantes, the first permanent legionary fortress to be built in Britain. In one of the ditches of the fortress at Colchester six human skulls were found, all displaying signs of a violent end. These are the remains of members of Trinovantes who had been beheaded by soldiers of Legio XX. Whether they were part of a minor uprising against the Romans is unclear, their heads were likely impaled on stakes outside the fortress as a warning to others, in a similar manner to the Dacian heads shown on Trajan’s Column.
 |
| Trajan's column |
An inscription on the tombstone of Marcus Favonius Facilis, a centurion from the unit (RIB 200), attests the presence of Legio XX at Colchester. The absence of wording typical of later funerary inscriptions and the absence of the legion’s cognomina ‘Valeria Victrix’ suggests that the tombstone was erected in the first half of the 1st century, before Legio XX suppressed the Boudiccan Revolt of AD 60-61, a victory said to have led to the legion being awarded the honorific title.
Breakout
Plautius and Vespasian returned to Rome in AD 47. Plautius was replaced as governor by Publius Ostorius Scapula who was intent on expanding the territory of the Province further west and north. Following initial success in the north against the Brigantes, Ostorius turned his attention to Wales where the Silures occupied the south and Ordovices the centre.
The legions had pushed out from the territory gained in the initial years of the invasion, establishing a series of vexilliation forts along a line roughly from Exeter to Lincoln, which would later be used as logistics bases in the next phase of conquest. The western limit of Roman conquest became known as the ‘Fosse Way Frontier’, following the line of the later Roman road running across the country from the south-west to the north-east.
 |
| The Fosse Way |
In AD 49 Ostorius moved Legio XX from Colchester to a new vexillation-sized fort at Kingsholm near Gloucester. We lack firm evidence for the movement of Legio XX after it left Colchester yet epigraphic evidence indicates a presence at Kingsholm, but we cannot be certain of the size of the unit based there.
This fort would typically accommodate around half-a-legion plus axillaries, between 2,500 – 4,000 men. The remainder of Legio XX were, presumably, left behind at Colchester and formed a colony of veterans, making Camulodunum the first Roman colonia in Britain officially named Colonia Claudia Victricensis. The majority of the colony's citizens would have come from Legio XX who had completed their service but were also complimented with retired soldiers from other British legions.
The Romans were now pushing westward beyond the Fosse Way Frontier with Legio XX engaged with the Silures in southern Wales and Legio XIV Gemina positioned in the Welsh Marches to confront the Ordovices. Following the refusal of the Silures to surrender Ostorius was determined to completely wipe them out, as was the Roman way with tribes they could not pacify. The conflict rumbled on until the death of Ostorius in AD 52.
We find epigraphic evidence for Legio XX at Kingsholm, again in the form of a tombstone. A funerary inscription for Lucius Octavius Martialis (RIB 3073), fragmented into two large pieces and many minor fragments, unusually lacks the years of service and age at death and as we saw at Colchester (RIB 200) the legion’s cognomina ‘Valeria Victrix’ is again absent.
Aulus Didius Gallus, a member of the Roman Senate, was sent to Britain to replace Ostorius as governor of Britain (AD 52-57). He relocated Legio XX to Usk (Burrium) in south-east Wales and Legio XIV Gemina to Wroxeter (Viroconium Cornoviorum) to continue the campaign against the Silures and Ordovices respectively. Archaeological excavations have confirmed that construction of the Roman fort at Usk commenced around AD 50. It is uncertain if Legio XX originally built the fort yet by AD 57 the legion occupied the fort which proved to be a key site in the campaign against the Silures in South Wales.
Didius is accused of being rather inactive during his tenure, with the ongoing conquest of the troublesome Britons becoming a frustration to Rome. Didius may have been following instructions from Claudius who began to doubt whether further conquest in the difficult terrain in Wales and the North was worth the risk. In AD 54 when Claudius died, Nero, the new emperor is said to have considered abandoning the province of Britannia entirely. Didius returned to Rome after five years as governor of the Province to be replaced by Quintus Veranius Nepos in AD 57. The new governor immediately reversed Didius’s policy of maintaining existing territory and resumed military operations against the Silures.
Veranius’s tenure was short, he died later that year, and was replaced as Governor by Gaius Seutonius Paulinus in AD 58. Paulinus continued the campaign against the Silures with relatively quick results. He then turned his attention to what he considered to be at the heart of the Briton’s resistance to Rome; Mona (Anglesey) the island home of the Druids, the leaders of Celtic religion.
Boudicca and the Druids
In AD 60 Paulinus led a force of around 20,000 soldiers, consisting of Legio XIV Gemina, a division of Legio XX with a similar number of auxiliaries to attack and destroy the seat of the Druids at Mona. This was likely a division from Legio XX on battle orders with the remainder of the legion remaining stationed at their parent fort.
The historians Tacitus and Cassius Dio, our only sources for this event, tell us that Legio XX were in Mona supporting the Roman governor Paulinus on a mission to exterminate the Druids who had been influencing the Celtic tribes of Britain. Paulinus was also intent on destroying the Druids' sacred groves and temples on the island but he had to abandon his conquest of Mona to take the legions south to deal with a rebellion of the Britons.
 |
| Boudicca |
Boudicca, Queen of the Iceni, had protested to the Romans how badly they were treating her kingdom. The Romans gave a brutal response; centurions pillaged the territory, the dead king’s household ransacked, the Queen flogged and her daughters raped. Boudicca’s response was to lead a savage rebellion against the Romans.
Boudicca led her tribal warriors south and besieged the now thriving town at Roman Colchester. As the governor Paulinus was engaged in Mona exterminating Druids, the veterans appealed to the procurator Catus Decianus in London for assistance. Decianus sent 200 poorly equipped Roman soldiers to defend Colchester to little effect. Quintus Petillius Cerialis (Rufus) commander of Legio IX Hispana, brought a division of his troops, probably 2,000 men, south from Lincoln (Longthorpe) but they were ambushed and annihilated by the wrath of the Iceni Queen. Cerialis fled with his cavalry, leaving his legionaries to suffer the slaughter, and hid in a nearby fort. Seeing the size of the rebellion Decianus fled to Gaul.
After a two-day siege, the destruction of Camulodunum was intense and complete with Colonia Claudia Victricensis burnt to the ground. Archaeologists refer to the ‘Boudiccan destruction layer’ as evidence of a widespread fire. The Iceni and Trinovantes then headed south to Londinium (London) before turning northwards to Verulamium (St Albans) where the destruction continued. Boudicca then turned her Celtic rebel army north to engage the Roman legions coming south from Mona for the final battle somewhere near the meeting place of the Roman roads Fosse Way and Watling Street. The Roman war machine was absolutely brutal in ensuring that this did not become a repeat of the Teutoburg Forest disaster.
The Trinovantes joined Boudica’s rebellion which now numbered as many as 230,000 Britons according to Dio, which is certainly an exaggeration although it was clearly a sizeable force. Modern estimates gauge the strength of the Britons at around 100,000 Iceni and Trinovantes joined by groups of other Celtic tribes and around 12,000 Romans consisting of Legio XIV Gemina and divisions from two other legions including Legio XX, plus several thousand auxiliaries and cavalry.
On shear strength of numbers the Britons should destroyed the much smaller Roman force, then British history may have been totally different. But as we know it was not to be.
Paulinus called upon Legio II Augusta at Isca Dumnoniorum (Exter) to join his force but the legion under acting-commander Poenius Postumus, the praefectus castorum, failed to respond and kept the legion safely in the south away from the action. Postumus clearly expected the Romans to fall and was ready for a speedy exit from the Province. But the disorganised Britons proved to be no match for the well-disciplined and better armed Roman forces. Having brought shame on Legio II Postumus committed suicide.
 |
| Boudicca's rebellion |
The battle site where the Iceni were slaughtered by the Romans has never been positively identified but Mancetter near Atherstone on the modern A5 road, roughly following the line of the Watling Street, is favoured. Tacitus writes that 80,000 Britons and just 400 Romans were killed in the battle. According to Tacitus Boudicca poisoned herself rather than face the humiliation of being taken captive by the Romans. The rebellion was over.
__________________________________________________________________________________
The cognomina of Legio XX
It is often said that both Legio XX and Legio XIV Gemina were awarded honorific titles for their courageous behaviour in the Boudiccan campaign; it is generally accepted from this point on Legio XX used the cognomina ‘Valeria Victrix’ (Valiant and Victorious) and XIV Gemina ‘Martia Victrix’ (Warlike and Victorious). Therefore the date of the Boudiccan rebellion AD 60-61 is assumed as the dating horizon for the honorific titles as we have seen with the epigraphic evidence at Colchester and Kingsholm. However, it should be noted that no ancient writer explains when or why these titles were awarded to Legio XX.
Tomlin ponders if the whole legion of Legio XX would have been awarded a honorific title for their part in quelling the Boudiccan Revolt as they only supplied a division whereas a full legion was provided by Legio XIV Gemina who accordingly did the bulk of the fighting at the battle of Watling Street. If Legio XX were not awarded the title for the Boudiccan campaign, as Tomlin questions, when did they receive it?
There are inscriptions to Legio XX in Illyricum where they fought in the Great Illyrian Revolt from AD 6 to AD 9 but none use the cognomina ‘Valeria Victrix’. We find three inscriptions which honour officers of Legio XX known to have served in Britain prior to AD 61 where the cognomina are also absent, whereas there are over fifty inscriptions to Legio XX from the 2nd and 3rd centuries, of which all but four contain the cognomina.
The cognomia does not appear to have been awarded early in the 1st century and there is a lack of evidence to confirm it was awarded to Legio XX after the Boudiccan Revolt. Was there a later event that would warrant such an award? Tomlin puts forward the suggestion that the cognomina ‘Valeria Victrix’ may have awarded after Legio XX distinguished itself for the campaign in Scotland under Agricola from AD 79, culminating in the Battle of Mons Graupius in AD 83. This is a distinct possibility, yet we must conclude that the current evidence does not allow us to determine the first instance of ‘Valeria Victrix’.
________________________________________________________________________________
Aftermath: Ravaged with Fire and Sword
The consequences of the Boudiccan revolt proved to be devastating for the Iceni. Nero immediately sent a further 2,000 legionaries with 1,000 cavalry and auxiliaries to replace the Roman losses and aid Paulinus in recovering the Province.
Paulinus was determined to carry out harsh reprisals against the Iceni and their allies. Many of the rebellious Britons that had supported Boudicca were put to the sword, their homes burned and crops destroyed. So effective was the retribution of the Romans that the homelands of the Iceni in Norfolk remained derelict and deserted for many years.
Concerned that this ruthless retribution had gone too far and would only lead to continued hostilities with the native Britons Paulinus was recalled by Emperor Nero in AD 62 and replaced by Publius Petronius Turpilianus. Taking a more conciliatory approach, the new governor’s aim was to stabilize the region and prevent further uprisings, consequently Petronius carried out few military operations. A year later Petronius was replaced by Marcus Trebellius Maximus.
The New Frontier
It is thought that Legio XX was involved with the defeat of Caratacus and the Ordovices in AD 51. The Iron Age hillfort at Caer Caradoc near Church Stretton in Shropshire is traditionally claimed as the site of Caratacus’s last battle. It is often assumed that Legio XX was withdrawn from Usk and posted to Viroconium (Wroxeter, Shropshire) taking possession of the fortress from Legio XIV Gemina which had been withdrawn from Britain in AD 68. Wroxeter would have been the perfect base to pursue the Ordovices in mid-Wales.
However, there is little direct evidence to support the presence of Legio XX at Wroxeter; it has been suggested that the legion may have been at Gloucester from AD 67 to AD 75. As noted above the movement of Legio XX once it left Colchester is poorly documented at this time and apart from involvement in the Boudiccan Revolt we know little for certain of their exact whereabouts.
Even so, it is generally accepted that the Roman presence at Gloucester was probably maintained by Legio II Augusta, transferred up from Isca Dumnoniorum (Exeter) who may have constructed the new legionary fortress at Glevum (Gloucester) replacing the smaller vexillation fort nearby at Kingsholm.
With the possible movement of Legio XX to Wroxeter the fort at Usk (Burrium) had been totally evacuated, and probably demolished, by AD 69 with construction of a new legionary fortress commenced at Isca Silurum (Caerleon) about 7 miles further downstream. Usk was liable to frequent flooding and not accessible by boat. The new fortress at Caerleon was sited where the river was navigable. It is of course possible that Legio XX had spent the period AD 67 – AD 75 building the new fortress at Caerleon, but again we lack firm evidence for this.
 |
| Caerleon legionary fortress |
On completion of the new fortress Legio II Augusta were transferred to Caerleon which remained as the legion’s headquarters until the 4th century. With Legio II Augusta firmly established at Caerleon the Roman fort at Glevum become a "colonia" of retired legionaries as Colonia Nervia Glevensium by AD 97.
Appointed as governor of Britain in AD 63, Trebellius continued the policy of consolidation taken by Petronius avoiding expansion of Roman territory. He continued the Romanisation of Britain and set about repairing the destruction caused by the Boudiccan revolt at Colchester and London. Five years later we can only assume that the province was relatively peaceful and sufficiently secure to permit the withdrawal of Legio XIV Gemina from Britain by the emperor Nero in AD 68 who considered the legion the best he had. Nero had plans for them in an eastern campaign but owing to his death the legion remained in the Balkans.
 |
| The Balkerne Gate, Colchester |
The remaining British legions became restless with the lack of activity and sure enough mutinies followed. Lacking military experience Trebellius was unable to restore discipline in the legions and soon came into conflict with Marcus Roscius Coelius, commander of Legio XX.
The Year of the Four Emperors
With the death of Nero in AD 68 the Julio-Claudian dynasty ended. Chaos ensued in the following year; The Year of the Four Emperors, the first civil war of the Roman Empire which would see four different individuals proclaimed as emperor.
Following Nero's suicide after being declared a public enemy by the Senate, Galba was appointed Emperor. Galba quickly fell out of favour and was assassinated by Marcus Salvius Otho with the assistance of the Praetorian Guard. Otho's reign was also turned out to be brief after he was challenged by Aulus Vitellius, governor of the province of Germania Inferior. Vitellius and the legions of the Rhine with others marched on Rome. Otho was supported by the legions of the Balkans including Legio XIV Gemina. The rival armies met near Cremona in Italy in the First Battle of Bedriacum with Vitellius triumphant. Legio XIV Gemina declared they had not been defeated as the main body arrived too late for the battle; to prevent any threat of further rebellion Vitellius sent the legion back to Britain where they remained for the rest of the civil war. Vitellius continued to march on Rome and was declared Emperor by the Senate.
Meanwhile back in Britain the turmoil presented Roscius with opportunity to rebel against the British Governor Trebellius who then quickly fled to the continent. Roscius supported Vitellius and had sent units from Legio XX to fight for him as had the other legions in Britain. Roscius and his fellow legionary commanders now effectively governed Britain until Vitellius, now emperor, sent Marcus Vettius Bolanus as the new governor in AD 69, who must have arrived in Britain around the same time as Legio XIV Gemina.
Vitellius’s position as emperor was not accepted by all, notably Titus Flavius Vespasian, the governor of Judaea, who had the support of the legions in the eastern provinces. Vespasian marched on Rome and emerged victorious ending Vitellius’s eight month reign. By the end of AD 69, Vespasian, who had earlier distinguished himself by leading Legio II Augusta in the invasion of Britain, established himself as emperor marking the beginning of the Flavian Dynasty and bringing stability back to the empire.
 |
| Titus Flavius Vespasian |
In AD 70 Vespasian replaced Roscius the treacherous commander of Legio XX with Gnaeus Julius Agricola. Agricola reimposed discipline on the rebellious legion that had supported Vitellius during the civil war. Agricola began his career as a military tribune having served in Britain under Gaius Suetonius Paulinus, governor of Britain from AD 58-62. During this time Agricola almost certainly took part in the attack on the Druids of Mona and the suppression of the Boudiccan Revolt in AD 60-61.
Bolanus remained as governor, reclaiming some of the territory lost in the revolt. In the same year Vespasian sent Legio XIV Gemina back across the Channel to form an army under Quintus Petillius Cerialis (formerly commander of Legio IX Hispana during the Boudiccan Revolt) to deal with a Batavian rebellion led by Julius Civilis who was attacking the garrisons on the Rhine. Cerialis was Vespasian’s son-in-law and had been taken hostage by Vitellius during the civil war. He escaped and joined the army that took Rome for Vespasian.
Vespasian rewarded Cerialis’s loyalty and success in Germania by appointing him as governor of Britain in AD 71, replacing Bolanus. Cerialis brought Legio II Adiutrix with him to Britain where he was closely supported by Agricola, commander of Legio XX.
Tacitus attributes the unrest within the British legions to their troops having too much time on their hands while being under-utilised by governors Petronius and Trebillius. The northern frontier had been consolidated at a line roughly from the River Dee to the Humber estuary in the east. Cerialis and Agricola would form a successful partnership that would result in expansion of the Roman occupation deep into the north of Britain.
Sources:
Simon Elliott, Agricola in Scotland, Pen & Sword Military, 2025.
Nic Fields, Boudicca’s Rebellion AD 60–61, Osprey, 2011.
Stephen James Malone, Legio XX Valeria Victrix: Prosopography, archaeology and history, BAR Publishing, 2006.
Robert McPake, A Note on the Cognomina of Legio XX, Britannia, Vol. 12, 1981.
Nigel Pollard & Joanne Berry, The Complete Roman Legions, Thames & Hudson, 2015 (Reprint edition 2024).
I.A. Richmond and R.P. Wright, The Catalogue of the Roman Inscribed and Sculptured Stones in the Grosvenor Museum, Chester, Chester Archaeological Society, 1955.
RSO Tomlin, The Twentieth Legion at Wroxeter and Carlisle in the First Century: The Epigraphic Evidence, Britannia, Vol. 23, 1992.
Graham Webster, the Roman Invasion of Britain, Routledge, revised edition 2003.
Graham Webster, A Short Guide to the Roman Inscriptions & Sculptured Stones in the Grosvenor Museum Chester, Grosvenor Pubication, 1970.
* * *
