# Constantine defeats Licinius at Chrysopolis, ending the eastern colleague in war

Date: 324

## The fact

In 324 Constantine defeated Licinius at Adrianople and Chrysopolis (18 September 324 in received chronology), ending the last tetrarchic colleague in open war and taking the East. Troops and cities were moved as the prize.

It is one event.

## Context

The 313 Milan agreement had been a joint instrument. 324 cancelled that partnership by force. Displacement of a court and its dependents is the path.

[Constantine the Great](/people/constantine-the-great)’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.

Cibalae 316 and the 324 campaign are received civil wars. Licinius was later executed despite an amnesty story. Shared armies, his command.
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

Britannica’s Constantine biography and Cambridge Ancient History independently narrate the 316/324 wars; Eusebius celebrates, which is a bias flag.

Official or archival record: Eusebius, Life of Constantine — New Advent (https://www.newadvent.org/fathers/2502.htm; New Advent).

## Significance

Destroying a co-emperor’s regime by campaign is a forced-displacement and war path, not a church council.

Licinius’s later execution is its own row.

Destroying a co-emperor’s regime by campaign is a forced-displacement and war path, not a church council.

## What is established and what is not

Established: received 324 victory over Licinius at Chrysopolis. Not established: that every eastern Christian was safer the next morning.

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 Constantine the Great.

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

- Constantine the Great: https://factrail.ai/people/constantine-the-great

## Drivers

- Forced-Displacement Scale: https://factrail.ai/drivers/forced-displacement-scale

## Sources

- https://www.britannica.com/biography/Constantine-I-Roman-emperor
- https://www.newadvent.org/fathers/2502.htm

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/co-licinius-wars