Publius Licinius Egnatius Gallienus was Roman emperor with his father Valerian from 253 to 260 and alone from 260 to 268. He ruled during the Crisis of the Third Century that nearly caused the collapse of the empire. He won numerous military victories against usurpers and Germanic tribes, but was unable to prevent the secession of important provinces. His 15-year reign was the longest in half a century.
Valerian was Roman emperor from 253 to spring 260 AD. Valerian is known as the first Roman emperor to have been taken captive in battle, captured by the Persian emperor Shapur I after the Battle of Edessa, causing shock and instability throughout the Roman Empire. The unprecedented event and his unknown fate generated a variety of different reactions and "new narratives about the Roman Empire in diverse contexts".
The Praetorian Guard was an elite unit of the Imperial Roman army that served as personal bodyguards and intelligence agents for the Roman emperors.
The equites constituted the second of the property-based classes of ancient Rome, ranking below the senatorial class. A member of the equestrian order was known as an eques.
Titus Fulvius Junius Quietus was a Roman usurper against Roman Emperor Gallienus.
Aureolus was a Roman military commander during the reign of Emperor Gallienus before he attempted to usurp the Roman Empire. After turning against Gallienus, Aureolus was killed during the political turmoil that surrounded the Emperor's assassination in a conspiracy orchestrated by his senior officers. Aureolus is known as one of the Thirty Tyrants and is referenced in ancient sources including the Historia Augusta, Zonaras' epitome and Zosimus' Historia Nova.
A vexillatio was a detachment of a Roman legion formed as a temporary task force created by the Roman army of the Principate. It was named from the standard carried by legionary detachments, the vexillum, which bore the emblem and name of the parent legion.
Publius Licinius Cornelius Saloninus Valerianus, typically just called Saloninus, was a Roman nobleman who briefly became emperor in 260. The grandson of Valerian I, Saloninus was appointed (subordinate) Caesar in 258 in an attempt to shore up the Licinial line of succession during the Crisis of the Third Century. During his time in power, Saloninus administered the German marches out of Cologne. Nevertheless, Saloninus soon became embroiled in a dispute with future Caesar of the Gallic Empire Postumus over war spoils. In 260, Saloninus' troops acclaimed him Emperor in an unsuccessful bid for political legitimacy; Postumus killed Saloninus shortly thereafter.
Gaius Ceionius Rufius Volusianus was a Roman senator who had a lengthy political career and who was appointed consul at least twice, the known dates being AD 311 and 314.
Marcus(?) Aurelius Heraclianus was a Roman soldier who rose to the rank of Praetorian Prefect in the latter part of the reign of the Emperor Gallienus. He was a member of the cabal of senior commanders of the Imperial field army that plotted and achieved the assassination of the Emperor Gallienus. His subsequent fate is uncertain. The only ancient reference has him committing suicide, but the circumstances are unclear.
Lucius Petronius Taurus Volusianus was a Roman citizen, apparently of equestrian origins, whose career in the Imperial Service in the mid-Third Century AD carried him from a relatively modest station in life to the highest public offices and senatorial status in a very few years. He may have secured his first appointments before the Licinian Dynasty – – acceded to the Empire in 253 AD, but it was in the course of their reign that his upward progress achieved an almost unprecedented momentum and the second factor seems to have been a consequence of the first. The nature of his relationship to the Licinii is uncertain, but it seems likely that a common origin in the Etruscan region of central Italy at least predisposed Gallienus in his favour and he seems to have been that emperor's most trusted servant and adviser during the period of his sole reign - 260(?)-268 AD.
Aper was a Roman citizen of the third century AD. First known to history as a professional soldier, he went on to serve as an acting provincial governor and finally became Praetorian prefect, under the Emperor Carus - in effect "vice principis". This rendered him hugely influential in the government of the empire - not excepting in matters of peace and war.
The History of the Constitution of the Late Roman Empire is a study of the ancient Roman Empire that traces the progression of Roman political development from the abolition of the Roman Principate around the year 200 until the fall of the Western Roman Empire in 476 CE. When Diocletian became Roman Emperor in 284 CE, he inherited a constitution that was no longer functioning, and so he enacted the most significant constitutional reforms in over 300 years. His reforms, much like those 300 years before, were intended to correct the errors in the previous constitution. Diocletian's specific reforms were less radical than was the reality that he exposed the state of government for what it had been for centuries: monarchy. With Diocletian's reforms the Principate was abolished, and a new system, the Dominate, was established.
Publius Aelius Aelianus was a senior officer in the Imperial Roman army in the mid-3rd century AD who rose from lowly origins to become the prefect of a legion under Emperor Gallienus. He was one of the earliest beneficiaries of Gallienus's policy that effectively excluded senators from army commands in favour of career-soldiers of equestrian rank. His later life is obscure.
Successianus was a Roman soldier, general and praetorian prefect in the third century AD of whom very little is known for certain. He is said to have distinguished himself as commander of the garrison of an allied city besieged by barbarian pirates, and then made praetorian prefect by the emperor Valerian on the strength of this. As praetorian prefect appears to have done useful work in restoring Antioch, the capital of the Roman East, after the devastation which had been inflicted by Shapur, the King of the Persians, in his invasion of 252. However, he was overwhelmed by the circumstances with which he had to contend when Shapur invaded on a second occasion in 260 and seems to have shared in the defeat of Valerian at the Battle of Edessa and his subsequent captivity in Persia.
Aurelius/Iulius Marcellinus was a Roman soldier and Imperial functionary who had a brilliant equestrian career and was elevated to the Senate when he was chosen by the Emperor Aurelian as his consular colleague. His appointment as Consul is thought to have been a reward for his loyalty and steadfastness in 273 when, as Aurelian's deputy in charge of the eastern provinces of the Empire where the authority of the Imperial Government had only recently been restored, he resisted attempts to suborn him by a rebellious faction in the city of Palmyra.
Traianus Mucianus was a Roman soldier of Thracian origins of the second half of the Third Century AD who rose from the lowest ranks of the army to senior commands. He was almost certainly a remarkable soldier. However, the successive promotions he secured in the latter part of his career are thought to owe much also to the favour shown him by men highly placed in the Imperial entourage whose patronage secured him advantageous postings in the Imperial comitatus, the mobile field force under the direct command of the Emperor, that was undergoing massive expansion at this time.
Lucius Aurelius Marcianus was a Roman soldier whose military career coincided with the period of crisis that characterized the middle decades of the Third Century AD – see Crisis of the Third Century. Probably of humble origins in one of the Illyrician provinces of the Empire he was one of the group of men from this region who chose a military career – or had it chosen for them – whose professional capabilities brought them to the fore of public life in those troubled times. Marcianus rose to the highest levels of the military hierarchy. The evidence suggests that he earned the trust of the Emperors Gallienus and Claudius II and, possibly, Marcus Aurelius Probus among their successors and that he was one of the principal commanders in the prolonged war against a coalition of what the late antique Greek writers called Scythian peoples whose incursions in that period seemed to threaten the very survival of the Roman state. These would refer to the major Germanic and Iranian peoples, among them the Goths and Roxolani, who invaded the Roman empire across the lower Danube River.
Tenagino Probus was a Roman soldier and procuratorial official whose career reached its peak at the end of the sixth decade of the third century AD. A poverty of primary sources means that nothing is known for certain of his origins or early career. However, in later years he served successively as Praeses (governor) of the province of Numidia and of Egypt,. These were both very senior procuratorial offices, the latter in particular traditionally considered one of the pinnacles of an equestrian career. In these roles he exercised military skills in addition to administrative ones; as Praefectus Aegypti he led military operations outside his province. He died resisting the invasion of Egypt by the forces of Zenobia of Palmyra in the troubled interregnum between Emperors Claudius II and Aurelian.
