The Roman frontiers are weakening against the…
244 CE
The Roman frontiers are weakening against the Germanic tribes across the Rhine and Danube, and the Sassanid Persian kingdom across the Euphrates has increased its own attacks.
When the Persians under Shapur I invaded Mesopotamia, the eighteen-year-old emperor Gordian III had opened the doors of the Temple of Janus for the last time in Roman history, and sent a huge army to the East.
The Sassanids had been driven back over the Euphrates in 243 and defeated in the Battle of Resaena.
The campaign was a success and Gordian, who had joined the army, was planning an invasion of the enemy's territory, when his father-in-law, Timesitheus, died in unclear circumstances.
Without the Praetorian Prefect, the campaign, and the emperor's security, are at risk.
Marcus Julius Philippus, known in English as Philip the Arab after the origin of his family, steps in at this moment as the new Praetorian Prefect and the campaign proceeds.
In the beginning of 244, the Persians counterattack.
Persian sources claim that a battle was fought near modern Fallujah (Iraq) and resulted in a major Roman defeat and the death, in late January or early February, of Gordian.
Roman sources do not mention this battle and suggest that Gordian died far away, upstream of the Euphrates.
Although ancient sources often described Philip, who succeeded Gordian as emperor, as having murdered Gordian at Zaitha (Qalat es Salihiyah) on February 11, the cause of Gordian's death is unknown.
The famous relief and trilingual inscription on Shapur’s monument, which he had cut at Naqsh-i-Rustam in modern-day Iran, claims that Gordian was killed in battle near the city of Misiche (roughly forty miles west of modern Baghdad) in which Shapur's forces were triumphant.
In any case, Philip, as the new emperor, is compelled to buy from the Sassanid Persian Empire what Roman historians will call a "most shameful peace."
Despite Shapur’s losses to the Romans, he is able to conclude the favorable peace in the spring of 244, reestablishing the former Roman-Persian boundary.