Decius was born at Bubalia, a town near Sirmium in Pannonia. He was either forty-eight or fifty-eight years of age, it is uncertain which, when he was proclaimed emperor; and from the imperfect accounts which we have of his reign he would seem to have been a man of considerable ability. His reign was, however, brief and unquiet. It had hardly commenced when he had to go in person to quell an insurrection in Gaul, and all the rest of it was occupied in war with the Goths.
[250-253 A.D.]
This people, whose original seat seems to have been the Scandinavian peninsula, had at an early period crossed the Baltic, and settled on its southern coast. They had gradually advanced southwards, and they now had reached the Euxine. In the time of Alexander Severus they had made inroads into Dacia; and in that of Philip they ravaged both that province and Mœsia. In the first year of Decius (250) the Gothic king Cniva passed the Danube at the head of seventy thousand warriors, and laid siege to the town of Eustesium (Novi); being repelled by the Roman general Gallus, he advanced against Nicopolis, whence he was driven by the emperor or his son (it is uncertain which) with a loss of thirty thousand men. Undismayed by his reverses he crossed Mount Hæmus, in the hope of surprising Philippopolis; Decius followed him, but his camp at Berœa was surprised by the Goths and his troops were cut to pieces. Philippopolis stood a siege of some duration; but it was taken, and the greater part of its inhabitants were massacred. The Goths now spread their ravages into Macedonia, the governor of which, Philip’s brother Priscus, assumed the purple under their protection.
It seems most probable that it was the younger Decius who met with these reverses, for the emperor must have been at Rome, as we find that on his leaving it (251) to direct the Gothic war, a person named Julius Valens was declared emperor, to the great joy of the people. He was, however, killed shortly after. Decius, who was worthy of empire, was meantime amidst the cares of war engaged in the visionary project of restoring the long-departed public virtue which had once ennobled Rome. With this view he proposed to revive the office of censor, and the choice of the person being left to the senate they unanimously voted it (October 27), to P. Licinius Valerianus as being the man most worthy of it. The decree was transmitted to the emperor, who was in Thrace; he read it aloud in a large assembly, and exhorted Valerian, who was present, to accept the proffered dignity. Valerian would fain excuse himself. We know not if the emperor was satisfied with his excuses, but from the turn which public affairs took the censorship was never exercised.
Decius was successful against the Goths, who offered to surrender their booty and prisoners if allowed to repass the Danube; but the emperor, who was resolved to strike such a blow as would daunt the barbarians and make them henceforth respect the Roman arms, refused all terms. The Goths therefore gave him battle in a place where a part of their front was covered by a morass. The younger Decius was slain by an arrow in the beginning of the action; but the emperor crying out that the loss of one soldier did not signify, led on his troops. In the attempt to cross the morass they were pierced by the arrows of the enemy, or swallowed up in the mire, and the body of the emperor was never found.
Gallus (C. Vibius Trebonianus Gallus), 251-253 A.D.
The senate, it is said, but more probably the army, conferred the vacant purple on Gallus, the governor of Mœsia. He adopted Hostilianus, the remaining son of Decius, and gave him the title of Augustus; but this youth dying soon after of the plague, Gallus associated his own son Volusianus in the empire. Unable probably to resist the victorious Goths, Gallus agreed that they should depart with their booty and prisoners, and even consented to pay them annually a large sum of gold. He then set out for Rome, where he remained for the rest of his reign, ruling with great mildness and equity.
[253-256 A.D.]
The Goths and their allies, heedless of treaties, again (253) poured over the Danube; but Æmilianus, the governor of Mœsia, gave them a signal defeat, and his victorious troops forthwith proclaimed him emperor. Without a moment’s delay he put them in motion for Rome. Gallus advanced to engage him; the troops came in sight of each other at Interamna (Terni), and those of Gallus seeing themselves the weaker, and gained by the promises of Æmilianus, murdered the emperor and his son, and passed over to the side of the rebel.
Æmilianus (C. Julius Æmilianus), 253 A.D.