Magnus Decentius (died 18 August 353) was ''

caesar Gaius Julius Caesar (; ; 12 July 100 BC – 15 March 44 BC), was a Roman general and statesman. A member of the First Triumvirate, Caesar led the Roman armies in the Gallic Wars before defeating his political rival Pompey in a civil war, an ...

'' of the

Western Roman Empire The Western Roman Empire comprised the western provinces of the Roman Empire at any time during which they were administered by a separate independent Imperial court; in particular, this term is used in historiography to describe the period ...

from 350 to 353, under his brother

Magnentius Magnus Magnentius ( 303 – 11 August 353) was a Roman general and usurper against Constantius II from 350 to 353. Of Germanic descent, Magnentius served with distinction in Gaul under the Western emperor Constans. On 18 January 350 Magnentius ...

History

Nothing is known of Decentius prior to 350. Magnentius usurped power from

Constans Flavius Julius Constans ( 323 – 350), sometimes called Constans I, was Roman emperor from 337 to 350. He held the imperial rank of '' caesar'' from 333, and was the youngest son of Constantine the Great. After his father's death, he was mad ...

on 18 January 350, and elevated Decentius as ''caesar'' later that year, perhaps on July or August. He was appointed

consul Consul (abbrev. ''cos.''; Latin plural ''consules'') was the title of one of the two chief magistrates of the Roman Republic, and subsequently also an important title under the Roman Empire. The title was used in other European city-states throu ...

in 352. In the following year, after he had lost the battle of Mursa Major, Magnentius' exactions to finance the war drove Gaul into revolt against his dictatorial rule, and Decentius was expelled from the capital,

Treves Trier ( , ; lb, Tréier ), formerly known in English as Trèves ( ;) and Triers (see also names in other languages), is a city on the banks of the Moselle in Germany. It lies in a valley between low vine-covered hills of red sandstone in the w ...

, which headed the revolt.

Constantius II Constantius II (Latin: ''Flavius Julius Constantius''; grc-gre, Κωνστάντιος; 7 August 317 – 3 November 361) was Roman emperor from 337 to 361. His reign saw constant warfare on the borders against the Sasanian Empire and Germanic ...

, emperor of the East, had meantime incited the Alemans to invade the province in order to increase the pressure on the usurper. Decentius, who led his brother's forces in the north, was defeated in a pitched battle by the

Alemannic Alemannic (''Alamannic'') or Alamanni may refer to: * Alemannic German, a dialect family in the Upper German branch of the German languages and its speakers * Alemanni, a confederation of Suebian Germanic tribes in the Roman period * Alamanni (surna ...

chief

Chnodomar Chnodomar (Latinized Chnodomarius) was the king of an Alamannic canton in what is now south-west Germany, near the Rhine from sometime before 352 till 357. He seems to have had a recognized position among the other Alamanni. Early career Chnodo ...

, and besieged in Sens. Decentius, when he heard of Magnentius' defeat by Constantius at the

Battle of Mons Seleucus The Battle of Mons Seleucus was fought in 353 between the forces of the Roman emperor Constantius II and the forces of the usurper Magnentius. Constantius' forces were victorious, and Magnentius later committed suicide. Background Following hi ...

and his subsequent suicide, strangled himself in the besieged city, signalling the end of the civil war.Gibbon, chap. XVIII., p. 597.

References

Ammianus Marcellinus Ammianus Marcellinus (occasionally anglicised as Ammian) (born , died 400) was a Roman soldier and historian who wrote the penultimate major historical account surviving from antiquity (preceding Procopius). His work, known as the ''Res Gestae ...

''Res Gestae'', XVI
*

Edward Gibbon Edward Gibbon (; 8 May 173716 January 1794) was an English historian, writer, and member of parliament. His most important work, '' The History of the Decline and Fall of the Roman Empire'', published in six volumes between 1776 and 1788, is ...

789 __NOTOC__ Year 789 ( DCCLXXXIX) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. The denomination 789 for this year has been used since the early medieval period, when the Anno Domini calenda ...

(1932) ''

The History of the Decline and Fall of the Roman Empire ''The History of the Decline and Fall of the Roman Empire'' is a six-volume work by the English historian Edward Gibbon. It traces Western civilization (as well as the Islamic and Mongolian conquests) from the height of the Roman Empire to th ...

''.

The Modern Library The Modern Library is an American book publishing imprint and formerly the parent company of Random House. Founded in 1917 by Albert Boni and Horace Liveright as an imprint of their publishing company Boni & Liveright, Modern Library became a ...

External links

{{Roman Emperors Ancient Roman military personnel who committed suicide 4th-century Roman usurpers Suicides by hanging in France Imperial Roman consuls 353 deaths Year of birth unknown Flavii