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eventVerified

Imperial troops massacre civilians at Thessalonica in 390 after the lynching of Butheric; numbers and orders remain source-critical

7,000 is a later figure, not supplied here as a Factrail count. Date is conventionally April/summer 390. 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

Ambrose’s Letter 51 independently of Britannica’s narrative treats the emperor as needing repentance for the Thessalonica killings.

Context

Gothic soldiery of the reconstituted army is the usual mechanism in the sources. Allegation about the emperor’s exact words stays allegation. Penance is a neighbouring 390 offset.

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

No contemporaneous civic register survives. Sozomen, Rufinus, Theodoret, and Ambrose’s Letter 51 are later. Britannica records a brutal retaliation and Ambrose’s demand for penance. 7,000 is a later figure, not supplied here as a Factrail count. Date is conventionally April/summer 390.

Who was responsible

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

  • Theodosius I

    Person

    Direct responsibility

    responsibility level 0.4 · verified

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.Ambrose, Letter 51 (to Theodosius) — New AdventNew Advent / Nicene and Post-Nicene Fathers · High credibility · verified
  2. 2.Britannica — Theodosius IEncyclopaedia Britannica · High credibility · verified
What the sources establish

Theodosius I did not file a later UNESCO form, a later Loeb colophon, or a later museum label as a personal act.

Causal path

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

  1. ActorTheodosius I
  2. contributed toFactImperial troops massacre civilians at Thessalonica in 390 after the lynching of Butheric; numbers and orders remain source-critical
  3. weakensDriverHumanitarian Access
  4. strengthensIndicatorPeople Internally Displaced by Conflict and Violence (IDMC)

Cite this page

Factrail. (2026). Imperial troops massacre civilians at Thessalonica in 390 after the lynching of Butheric; numbers and orders remain source-critical. Factrail. https://factrail.ai/facts/theo-thessalonica-390

https://factrail.ai/facts/theo-thessalonica-390

Accessed 16 October 2026.

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

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