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Constantine defeats Maxentius at the Milvian Bridge, a civil-war killing of a rival court

On 28 October 312 Constantine’s army defeated Maxentius at the Milvian Bridge on the Tiber. Rome’s rival western court ended by battle, not by a senate ballot. In the causal graph this event weakens Humanitarian Access, a driver that strengthens People Internally Displaced by Conflict and Violence (IDMC) — an improving welfare path.

Sources: [1][2]

Read the full account

On 28 October 312 Constantine’s army defeated Maxentius at the Milvian Bridge on the Tiber. Maxentius died in the river. Rome’s rival western court ended by battle, not by a senate ballot.

Context

A civil-war victory can later be captioned as Christian liberation.

Constantine the Great’s documented role is bounded by other offices and collaborators named in the sources below.

28 October 312 is received battle date. Maxentius drowned. Eusebius and Lactantius later attach a vision/labarum. Those attachments are not a staff diary.

Why it matters

Split Milan 313.

Who was responsible

Contribution type and responsibility level for each recorded actor — not sole-author shorthand.

What changed

Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.

Evidence

The sources behind this fact and its verification state.

Verified2 sources on file
  1. 1.Britannica — Battle of the Milvian BridgeEncyclopaedia Britannica · High credibility · verified
  2. 2.Lactantius, Of the Manner in Which the Persecutors Died — New AdventNew Advent / Catholic Encyclopedia fathers · High credibility · verified
What the sources establish

Britannica’s Milvian Bridge entry and Livius independently date the battle; Lactantius/Eusebius are later Christian narrators, not a casualty roll.

Established: received 28 October 312 battle and Maxentius’s death. Not established: a Factrail headcount, or that a heavenly sign was photographed.

Causal path

How this event connects to drivers and indicators in the graph.

  1. ActorConstantine the Great
  2. contributed toFactConstantine defeats Maxentius at the Milvian Bridge, a civil-war killing of a rival court
  3. weakensDriverHumanitarian Access
  4. strengthensIndicatorPeople Internally Displaced by Conflict and Violence (IDMC)

Cite this page

Factrail. (2026). Constantine defeats Maxentius at the Milvian Bridge, a civil-war killing of a rival court. Factrail. https://factrail.ai/facts/co-milvian-bridge-312

https://factrail.ai/facts/co-milvian-bridge-312

Accessed 16 October 2026.

By the Factrail desk · Method: how we source and score · Last reviewed

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