Constantius II was Roman emperor from 337 to 361. His reign saw constant warfare on the borders against the Sasanian Empire and Germanic peoples, while internally the Roman Empire went through repeated civil wars, court intrigues, and usurpations. His religious policies inflamed domestic conflicts that would continue after his death.
Magnus Maximus was Roman emperor of the Western Roman Empire from 383 to 388. He usurped the throne from emperor Gratian.
The Battle of Adrianople, sometimes known as the Battle of Hadrianopolis, was fought between an Eastern Roman army led by the Eastern Roman Emperor Valens and Gothic rebels led by Fritigern. The battle took place in the vicinity of Adrianople, in the Roman province of Thracia. It ended with an overwhelming victory for the Goths and the death of Emperor Valens.
Valentinian I, sometimes called Valentinian the Great, was Roman emperor from 364 to 375. He ruled the Western half of the empire, while his brother Valens ruled the East. During his reign, he fought successfully against the Alamanni, Quadi, and Sarmatians, strengthening the border fortifications and conducting campaigns across the Rhine and Danube. His general Theodosius defeated a revolt in Africa and the Great Conspiracy, a coordinated assault on Roman Britain by Picts, Scoti, and Saxons. Valentinian founded the Valentinianic dynasty, with his sons Gratian and Valentinian II succeeding him in the western half of the empire.
The Notitia Dignitatum is a document of the Late Roman Empire that details the administrative organization of the Western and the Eastern Roman Empire. It is unique as one of very few surviving documents of Roman government, and describes several thousand offices from the imperial court to provincial governments, diplomatic missions, and army units. It is usually considered to be accurate for the Western Roman Empire in the AD 420s and for the Eastern or Byzantine Empire in the AD 390s. However, the text itself is not dated, and omissions complicate ascertaining its date from its content.
Britannia Prima or Britannia I was one of the provinces of the Diocese of "the Britains" created during the Diocletian Reforms at the end of the 3rd century. It was probably created after the defeat of the usurper Allectus by Constantius Chlorus in AD 296 and was mentioned in the c. 312 Verona List of the Roman provinces. Its position and capital remain uncertain, although it was probably located closer to Rome than Britannia II. At present, most scholars place Britannia I in Wales, Cornwall, and the lands connecting them. On the basis of a recovered inscription, its capital is now usually placed at Corinium of the Dobunni (Cirencester) but some emendations of the list of bishops attending the 315 Council of Arles would place a provincial capital in Isca (Caerleon) or Deva (Chester), which were known legionary bases.
Britannia Secunda or Britannia II was one of the provinces of the Diocese of "the Britains" created during the Diocletian Reforms at the end of the 3rd century. It was probably created after the defeat of the usurper Allectus by Constantius Chlorus in AD 296 and was mentioned in the c. 312 Verona List of the Roman provinces. Its position and capital remain uncertain, although it probably lay further from Rome than Britannia I. At present, most scholars place Britannia II in Yorkshire and northern England. If so, its capital would have been Eboracum (York).
Paulus Catena (fl. 350s, d. 361/2) was a senior Roman public official who served as an investigator and notary for Constantius II during the mid-fourth century. He is principally known through the writings of Ammianus Marcellinus, though he is also present in the works of Libanius and Julian the Apostate. Marcellinus describes him as infamously cruel, and a skilled fabricator of false accusations.
The Count of the Saxon Shore for Britain was the head of the Saxon Shore military command of the later Roman Empire.
The Great Conspiracy was a year-long state of war and disorder that occurred near the end of Roman Britain. The historian Ammianus Marcellinus described it as a barbarica conspiratio, which took advantage of a depleted military force in the province; many soldiers had marched with Magnentius in his unsuccessful bid to become emperor. Few returned, and supply, pay, and discipline in the following years may have been deficient.
The Laterculus Veronensis or Verona List is a list of Roman provinces and barbarian peoples from the time of the emperors Diocletian and Constantine I, most likely from AD 314.
Justina was a Roman empress. She was initially the wife of the rebel emperor Magnentius and was then married to Valentinian I, with whom she had four children, including the emperor Valentinian II and the empress Galla.
The Damnonii were a Brittonic people of the late 2nd century who lived in what became the Kingdom of Strathclyde by the Early Middle Ages, and is now southern Scotland. They are mentioned briefly in Ptolemy's Geography, where he uses both of the terms "Damnonii" and "Damnii" to describe them, and there is no other historical record of them, except arguably by Gildas three centuries later. Their cultural and linguistic affinity is presumed to be Brythonic. However, there is no unbroken historical record, and a partly Pictish origin is not precluded.
The Osismii, Ossismii, or Ostimii were a Gallic tribe dwelling in the western part of the Armorican Peninsula during the Iron Age and the Roman period.
The Taifals or Tayfals were a people group of Germanic or Sarmatian origin, first documented north of the lower Danube in the mid third century AD. They experienced an unsettled and fragmented history, for the most part in association with various Gothic peoples, and alternately fighting against or for the Romans. In the late fourth century some Taifali were settled within the Roman Empire, notably in western Gaul in the modern province of Poitou. They subsequently supplied mounted units to the Roman army and continued to be a significant source of cavalry for early Merovingian armies. By the sixth century their region of western Gaul had acquired a distinct identity as Thifalia.
The Saxon Shore was a military command of the Late Roman Empire, consisting of a series of fortifications on both sides of the Channel. It was established in the late 3rd century and was led by the "Count of the Saxon Shore". In the late 4th century, his functions were limited to Britain, while the fortifications in Gaul were established as separate commands. Several well-preserved Saxon Shore forts survive in east and south-east England.
The Description of Britain, also known by its Latin name De Situ Britanniae, was a literary forgery perpetrated by Charles Bertram on the historians of England. It purported to be a 15th-century manuscript by the English monk Richard of Westminster, including information from a lost contemporary account of Britain by a Roman general, new details of the Roman roads in Britain in the style of the Antonine Itinerary, and "an antient map" as detailed as the works of Ptolemy. Bertram disclosed the existence of the work through his correspondence with the antiquarian William Stukeley by 1748, provided him "a copy" which was made available in London by 1749, and published it in Latin in 1757. By this point, his Richard had become conflated with the historical Richard of Cirencester. The text was treated as a legitimate and major source of information on Roman Britain from the 1750s through the 19th century, when it was progressively debunked by John Hodgson, Karl Wex, B. B. Woodward, and John E. B. Mayor. Effects from the forgery can still be found in works on British history and it is generally credited with having named the Pennine Mountains.
This article chronicles the attested movements of the fourth-century Roman emperors Constantine II, Constantius II, Constans, Gallus, and Julian the Apostate from 337 to 361 AD. It does not cover the imperial usurpers of the period, including Magnentius, Vetranio, Claudius Silvanus, and Poemenius. The chronology is principally derived from Timothy Barnes' Athanasius and Constantius. Substantial additions and further sources are based on recent research that seeks to go beyond Barnes' own chronology and slightly modifying his at a few places.
The Heruli was an auxilia palatina unit of the Late Roman army, active between the 4th and the 5th century. It was composed of 500 soldiers and was the heir of those ethnic groups that were initially used as auxiliary units of the Roman army and later integrated in the Roman Empire after the Constitutio Antoniniana. Their name was derived from the people of the Heruli. In the sources they are usually recorded together with the Batavi, and it is probable the two units fought together. At the beginning of the 5th century two related units are attested, the Heruli seniores in the West and the Heruli iuniores in the East.
Vespasiana was a fictional 4th-century Roman province in Caledonia that appeared in Charles Bertram's 18th-century forgery On the State of Britain, which purported to be "Richard of Westminster"'s 14th-century retelling of a Roman general's contemporary account of Britain in late antiquity.
