Emperor from 217 to 218, and a one-time prefect of the praetorian guard under Caracalla
Macrinus was born to a poor family in Caesarea, in Mauretania, and many details of his life have not been verified, but he apparently moved to Rome and acquired a position as adviser on law and finances to the Praetorian prefect Plautianus. Surviving the fall of the prefect in 205, Macrinus became financial minister to Septimius Severus and of the Flaminian Way. By 212, Macrinus held the trust of Emperor Caracalla and was appointed prefect of the Praetorian Guard, sharing his duties with Oclatinus Adventus. Campaigning with Caracalla in 216 against the Parthians, Macrinus came to fear for his own safety, as Caracalla could be murderous. When letters addressed to the emperor seemed to point to his own doom, Macrinus engineered a conspiracy that ended in early 217 with Caracalla’s assassination near Edessa.
Feigning grief and surprise, Macrinus manipulated the legions into proclaiming him emperor. To ensure their devotion and to assuage any doubts as to his complicity in the murder, he deified the martially popular Caracalla. Meanwhile, the Senate, which had come to loathe the emperor, granted full approval to Macrinus’s claims. The Senate’s enthusiasm was dampened, however, by Macrinus’s appointments, including Adventus as city prefect and Ulpius Julianus and Julianus Nestor as prefects of the Guard. Adventus was too old and unqualified, while the two prefects and Adventus had been heads of the feared frumentarii.
Real problems, both military and political, soon surfaced. Artabanus V had invaded Mesopotamia, and the resulting battle of Nisibis did not resolve matters. Unable to push his troops, whom he did not trust, Macrinus accepted a humiliating peace. This, unfortunately, coincided with plotting by Caracalla’s Syrian family, headed by JULIA MAESA. Macrinus had tried to create dynastic stability, but mutiny in the Syrian legions threatened his survival. The Severans put up the young Elagabalus, high priest of the Sun God at Emesa, as the rival for the throne. Macrinus sent his prefect Ulpius against the Sev-eran forces only to have him betrayed and murdered. He then faced Elagabalus’s army, led by the eunuch Gannys, and lost. Macrinus fled to Antioch and tried to escape to the West but was captured at Chalcedon and returned to
Antioch. Both Macrinus and his son diadumenianus, whom he had declared his co-ruler, were executed.
The reign of Macrinus was important in that it was the first time that a nonsenator and a Mauretanian had occupied the throne. Further, he could be called the first of the soldier emperors who would dominate the chaotic third century c. E. As his successors would discover, the loyalty of the legions was crucial, more important in some ways than the support of the rest of the Roman Empire.
Macrinus, Veturius (fl. late second century c. e.) Prefect of the Praetorian Guard in the reign of Didius Julianus and the era of Septimius Severus
Macrinus, a supporter of Severus, was appointed to the post of prefect by Julianus in 193 in the hopes that the emperor might gain favor with Severus, who was advancing on Rome with the legions from Pannonia. The attempt failed, and Julianus fell from power. Macrinus, who had already been promised the office by Severus, was retained, serving until 200.