A major river forming part of the boundary between Roman and Persian territory, the Tigris marked the eastern limit of Roman military ambition on multiple occasions. The emperor Carus died on its banks in 283, allegedly struck by lightning—a story some sources treat as cover for foul play—halting a Roman advance into Persia. Over a century later, Julian crossed back over the river after abandoning his siege of Ctesiphon, beginning a harassed retreat northward that would prove fatal to his campaign.
What each episode says
Episode 2 (1 mention)
The river on whose banks the emperor Carus was killed by a bolt of lightning in 283, halting the Roman advance into Persia. Brownworth implies the lightning story was cover for assassination by Diocletian.
“got no further because there, on the banks of the Tigris, the 59 year old Charis was”
Episode 5 (1 mention)
Julian recrossed the Tigris after abandoning the siege of Ctesiphon, beginning his ill-fated retreat northward through Persian territory while constantly harassed by the enemy.
“With morale sinking, he abandoned the siege, recrossed the Tigris, and proposed to his”
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