# Diocletian is acclaimed after Numerian’s death, opening a civil war with Carinus

Date: 284

## The fact

On 20 November 284 the army acclaimed [Diocletian](/people/diocletian) after Numerian’s death. A civil war with Carinus followed, ending at the Margus as received.

It is one event.

## Context

Third-century accessions are usually bloody. This still stores a Roman-on-Roman war as a humanitarian-harm path.

Diocletian’s documented role is bounded by other offices and collaborators named in the sources below. Sharing a field with them is not a reason to drop a documented act, and it is not a reason to assign later consequences done in the name after death.

20 November 284 as received at Nicomedia. Battle of the Margus 285 kills Carinus as received. Later Latin is the carrier.
Named person as heading of the dated public instrument. Later editors, museums, printers, or offices share publication. Complex where later carriers date the row.

## Evidence and sources

Livius and Britannica independently date 284 and the war with Carinus; Lactantius later moralizes, not a casualty roll.

Official or archival record: Livius — Diocletian (https://www.livius.org/articles/person/diocletian/; Livius.org).

## Significance

Winning the purple by civil war is a humanitarian-harm path.

284 is not 303. Keep the persecution edicts.

Winning the purple by civil war is a humanitarian-harm path.

## What is established and what is not

Established: received 20 November 284 acclamation and subsequent war with Carinus. Not established: a unique 285 death series.

What would change the picture: a contradictory original with a different date or name, or a measured series that can be argued, with lag and alternatives, as a consequence of this instrument rather than of later institutions.

The date is the date of this instrument, not a licence to back-date every later harm or benefit.

Established here: a sourced, dated public instrument with a named contribution by Diocletian.

What would change the picture: a contradictory original with a different date, signatory, or non-occurrence; a demonstrated forgery; or a measured series that can be argued, with lag and alternatives, as a consequence of this instrument rather than of other causes.

They are not a public rating.

## People

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

## Drivers

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

## Sources

- https://www.britannica.com/biography/Diocletian
- https://www.livius.org/articles/person/diocletian/

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/di-accession-284-civil-blood