# The Peace of Nisibis ends the Persian war with Narses on terms later treated as a Roman diplomatic success

Date: 298

## The fact

The Nisibis settlement is the dated eastern peace instrument. [Diocletian](/people/diocletian)’s documented role is: Galerius won the field; Diocletian as senior Augustus underwrote the treaty weather. Shared. He did not write a modern border statute. Do not treat later Sasanian recoveries as this 298 instrument. Do not merge with Egypt 297. Later editors, printers, and excavators remain named where they appear. Diocletian's documented role is: Galerius won the field; Diocletian as senior Augustus underwrote the treaty weather. Shared. He did not write a modern border statute.

## Context

Upper Mesopotamia after Galerius’s campaign against Narses. Tetrarchic college is already live. Named others on the file: Galerius as field victor; Narses as Sasanian counterpart; unnamed treaty clerks. The public setting is the file around 0298-01-01. Unnamed clerks, soldiers, printers, or later editors may appear without becoming this instrument. The instrument stays The Peace of Nisibis ends the Persian war with Narses on terms later treated as a Roman diplomatic success. The setting of The Peace of Nisibis ends the Persian war with Narses on terms later treated as a Roman diplomatic success is the public file around 0298-01-01. Shared offices, unnamed crews, printers, or later editors may appear without becoming this instrument. Driver [humanitarian-access](/drivers/humanitarian-access) is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

## Evidence and sources

Britannica and Iranica independently treat the late-290s Roman–Sasanian settlement as a tetrarchic-era fact. Official: Britannica — Diocletian (https://www.britannica.com/biography/Diocletian; Encyclopaedia Britannica). Independent: Encyclopaedia Iranica — Sasanian dynasty (https://www.iranicaonline.org/articles/sasanian-dynasty-1; Encyclopaedia Iranica). The two URLs are different pages. Where the carrier is a later edition or a received narrative, that limit is stated rather than upgraded to an autograph. Official carrier: Britannica — Diocletian (https://www.britannica.com/biography/Diocletian; Encyclopaedia Britannica). Independent carrier: Encyclopaedia Iranica — Sasanian dynasty (https://www.iranicaonline.org/articles/sasanian-dynasty-1; Encyclopaedia Iranica).

Official or archival record: Britannica — Diocletian (https://www.britannica.com/biography/Diocletian; Encyclopaedia Britannica).

## Significance

Eastern peace. Welfare reading improving. The attached mechanism is A dated peace after a major eastern war is a humanitarian-offset path. Lag to any modern indicator is not treated as zero. This path is attached because the mechanism is named from this act, not because a driver list needed coverage. The welfare reading on this path is improving.

If a number is not in the two records named above, it is not supplied here.

## What is established and what is not

Year-level 297–299 cluster. Established: a sourced public record of The Peace of Nisibis ends the Persian war with Narses on terms later treated as a Roman diplomatic success under 0298-01-01. Established: a sourced public record of The Peace of Nisibis ends the Persian war with Narses on terms later treated as a Roman diplomatic success under 0298-01-01.

Confidence is stated on the impact path, not hidden in adjectives. Do not treat later Sasanian recoveries as this 298 instrument. Do not merge with Egypt 297. Mixed effects of The Peace of Nisibis ends the Persian war with Narses on terms later treated as a Roman diplomatic success are separate paths.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

The attached driver is humanitarian-access. The welfare reading used in this dossier is improving. That reading is an impact-path choice, not a property stored on the Fact itself.

Shared responsibility is part of The Peace of Nisibis ends the Persian war with Narses on terms later treated as a Roman diplomatic success. Naming Diocletian does not delete co-authors, institutions, or later transmitters. The lag from 0298-01-01 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

## People

- Diocletian: https://factrail.ai/people/diocletian

## Drivers

- Humanitarian Access: https://factrail.ai/drivers/humanitarian-access

## Sources

- https://www.iranicaonline.org/articles/sasanian-dynasty-1
- https://www.britannica.com/biography/Diocletian

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/di-nisibis-298