# Marcia, Eclectus, and Laetus form the palace plot that ends in Commodus’s murder as later Dio/Herodian tell it

Date: 192

## The fact

Dio and Herodian independently narrate Marcia, Eclectus, and Laetus as the inner plotters before Narcissus strangles Commodus.

It is one event.

## Context

A palace murder-plot is a [democratic-resilience](/drivers/democratic-resilience) harm heading for succession-by-cubiculum. Shared fear of the New Year gladiator plan remains in the literary file. Do not treat HA extras as minutes.

Commodus’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.

The assassination row stores the 31 December killing. Pertinax’s succession is aftermath, not Commodus’s act. Dio and Herodian are later literary carriers.

Named person as heading of the dated public instrument. Later editors, museums, printers, or offices share publication. Complex where later carriers are the surviving public file.

## Evidence and sources

Cassius Dio Book 73 (Loeb English) — Commodus and Herodian, Roman History — Livius English independently describe this instrument.

Official or archival record: Cassius Dio Book 73 (Loeb English) — Commodus (https://penelope.uchicago.edu/Thayer/E/Roman/Texts/Cassius_Dio/73*.html; LacusCurtius / University of Chicago).

## Significance

The Marcia–Eclectus–Laetus plot is a resilience-harm path of high confidence on the named trio in the standard file, medium on every private motive clause.

## What is established and what is not

Established as a sourced public record of this instrument at the date assigned here.

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 Commodus.

They are not a public rating.

The driver `democratic-resilience` is attached because the mechanism named in Significance follows from this instrument, not because a standing list of welfare headings needed another tick. Commodus did not file a later UNESCO form, a later Loeb colophon, or a later museum label as a personal act. A portrait or conventional bust is not this mechanism. Allegation, reconstruction, and established occurrence stay distinct. Pertinax aftermath is not Commodus’s act. Split plot from the strangling outcome row. Keep the carrier date of later English distinct from the received historical year stored in the date field. Do not read a later English edition as a recovered autograph of Commodus.

## People

- Commodus: https://factrail.ai/people/commodus

## Drivers

- Democratic Resilience: https://factrail.ai/drivers/democratic-resilience

## Sources

- https://www.livius.org/sources/content/herodian-s-roman-history/
- https://penelope.uchicago.edu/Thayer/E/Roman/Texts/Cassius_Dio/73*.html

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/com-marcia-eclectus-laetus-plot