Gallienus

Gallienus was Roman emperor from 253 to 268, ruling first with his father Valerian and then alone amid civil wars, invasions, and breakaway provinces.

Valerian: Valerian was Roman emperor from 253 to 260 and Gallienus’s father and co-ruler. Their joint rule began in 253; Valerian’s capture left Gallienus sole emperor.
Roman cavalry: Roman cavalry comprised mounted troops used for scouting, combat, and pursuit across the empire. Gallienus is associated with elevating cavalry forces as a mobile response to invasions.
Valerianic dynasty: The Valerianic dynasty was the short-lived imperial house formed by Valerian and his son Gallienus. Gallienus’s authority initially rested on his place in this ruling family.
Gallienus medallions: Gallienus medallions are large Roman bronze or gold issues bearing imperial portraits and ceremonial imagery. Their imagery shows how the emperor presented his authority and military role.
Battle of Edessa: The Battle of Edessa in 260 was a Roman defeat by the Sasanian Empire, after which Emperor Valerian was captured. Valerian’s capture at Edessa forced Gallienus to manage the eastern crisis from afar.
Aurelian: Aurelian was Roman emperor from 270 to 275, known for defeating breakaway regimes and repelling invasions. Aurelian’s reunification of the empire followed the fragmentation Gallienus struggled to contain.
Roman Senate: The Roman Senate was the aristocratic assembly that retained civic and ceremonial roles under the emperors. Ancient accounts connect Gallienus with limiting senators’ access to military commands.
Antoninianus: The antoninianus was a Roman silver-based coin introduced in the third century and widely issued during the imperial crisis. Gallienus’s coinage used this denomination to circulate imperial portraits and messages across his territories.
Postumus: Postumus was a Roman general who established the breakaway Gallic Empire around 260. His revolt deprived Gallienus of control over much of the western provinces.
Claudius Gothicus: Claudius Gothicus was Roman emperor from 268 to 270, succeeding Gallienus after his assassination. His accession ended Gallienus’s reign and continued rule by military emperors.

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