Legio XX Valeria Victrix
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The origin of the Legion's name is unclear and there are various theories, but the legion may have gained its title Valeria Victrix from a victory it achieved during the Great Illyrian revolt under the command of the general Marcus Valerius Messalla Messallinus.
The legion then moved to Burnum in Illyricum at the beginning of the Pannonian uprising (Bellum Batonianum) in AD 6. It is recorded operating against the Marcomanni in AD 6 in the army of Tiberius.
In Illyria they were led by the governor of Illyricum, Marcus Valerius Messalla Messallinus, who may have given his clan (gens) name Valeria to the legion. Although understrength, they managed to defeat the rebels led by Bato of the Daesitiates. In one battle the legion cut through the enemy lines, was surrounded, and cut its way out again.
The legion was one of the four with which Claudius invaded Britain in 43 AD. It was also one of the two legions that defeated Caratacus at the Battle of Caer Caradoc, after which, from the AD 50s, it was encamped at Camulodunum, with a few units at Kingsholm in Gloucester.
Around AD 55 it moved to Usk, for the conquest of the Silures, a tribe very resistant to the imposition of Roman rule in Wales. In AD 60 or 61 the Twentieth helped put down the revolt of queen Boudica, after having routed the Ordovices by crossing Menai Strait in Wales to destroy the Druids' sacred groves in 58. In AD 66, the legion was transferred to Viroconium (Wroxeter).
In the year of the four emperors, the legion sided with Vitellius. Some units went with him to Rome. In AD 78–84, the legion was part of Gnaeus Julius Agricola's campaigns in northern Britannia and Caledonia, and built the base at Inchtuthill. In AD 88 the legion returned south and occupied Castra Deva (Deva Victrix), where it remained based for at least two centuries.
The Twentieth was among the legions involved with the construction of Hadrian's Wall, and the discovery of stone altars commemorating their work in Caledonia suggests that they had some role in building the Antonine Wall.
During the Carausian Revolt, which established the Britannic Empire under Carausius and Allectus in the 280s and 290s, the XX Valeria Victrix was still active. No further information is known after this period and scholars believe the XX legion was still stationed in Britain when the usurper Constantine III pulled the bulk of the military forces from there in the year 407 for his doomed campaign on the continent.
This legion has been much studied; at least 250 members of the legion have been identified in surviving inscriptions.
Legio XX Valeria Victrix and their final days in Deva (Chester) in the early AD 400s form the backdrop to the Tom Stevens mythic fiction genre novel The Cauldron (special edition) with the story's protagonist Valerian—the Praefectus and Chief Centurion—defending the city with the rump of the legion against the incursions of Hibernian pirates as the "Dark Ages" settle on Britannia. The movie Victrix! The Valiant of Albion is in production and features an adaptation of Tom Stevens novel.
Gaius Petreius Ruso, protagonist of Medicus by Ruth Downie, is a military doctor in Britannia attached to Legio XX.
Legio XX Valeria Victrix lends its name to the character Valeria Matuchek in Poul Anderson's Operation Chaos and its sequel Operation Luna; her mother is said to describe this legion as the last to leave Britain—"the last that stood against Chaos".
The first person narrator of Stephen Vincent Benét's short story "The Last of the Legions" is the senior centurion of the Valeria Victrix, who recounts the events and the impressions of soldiers and populace surrounding the departure of the legion from Britain.
Legion Company of the U.S. Army's 1st battalion, 503rd Infantry Regiment, 173rd Airborne Brigade stationed in Vicenza, Italy is named after Legio XX. They chose this name for the paratroopers' ability to fight fiercely behind enemy lines.
Legio XX Valeria Victrix features in the six novel series "Soldier of Rome - The Artorian Chronicles" by James Mace
- Velleius Paterculus, Compendium of Roman History, 2.112.1-2.
- Velleius Paterculus, 2.112.1-2, Cassius Dio, 55.30.1-5.
- Moffat, Alistair (2005). Before Scotland. Thames & Hudson. pp. 243–245. ISBN 978-0-500-05133-7.
- W. H. Manning (2000). "The fortresses of Legio XX". In RJ Brewer (ed.) Roman Fortresses and Their Legions.
- "RIB 2199. Distance Slab of the Sixth Legion". Roman Inscriptions of Britain. Retrieved 18 November 2017.
- Macdonald, Sir George (1934). The Roman wall in Scotland, by Sir George Macdonald (2d ed., rev., enl., and in great part rewritten ed.). Oxford: The Clarendon press. p. 387. Retrieved 11 October 2017.
- "Distance slab of the 20th Legion, Cochno Estate, Duntocher". Retrieved 14 November 2017.
- "Distance slab of the Twentieth Legion, Castlehill". Retrieved 27 October 2017.
- Mason (2001), pp. 155–156.
- (special edition) ISBN 978-0-9559656-1-6