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Gallus(Caius Vibius Trebonianus Gallus) (găl`əs), d. 253 or 254, Roman emperor after 251. He fought in the eastern campaign that proved fatal to DeciusDecius
(Caius Messius Quintus Decius) , 201–51, Roman emperor (249–51), b. Pannonia. He was sent by Philip (Philip the Arabian) to quell a mutiny, but when the soldiers hailed him as emperor, he marched at their head, defeated and killed Philip near Verona, and
..... Click the link for more information. . Gallus became emperor and accepted Hostilianus, Decius' son, as his colleague, or nominal coruler. In Gallus' reign the Persians overran Mesopotamia, and the Goths invaded Moesia and Thrace. In 252 or 253 a new invasion was repelled in the Danube valley by the general Aemilianus, whose troops proclaimed him emperor. Gallus sent ValerianValerian
(Publius Licinius Valerianus) , d. after 260, Roman emperor (253–60). He held important posts, both civil and military, under the emperors Decius and Gallus. After the short reign of the former general Aemilianus, Valerian was proclaimed emperor.
..... Click the link for more information. to put down the sedition. Aemilianus entered Italy, and the army murdered Gallus. Aemilianus succeeded, and Valerian succeeded him soon afterward.
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