A conflict between the Kyrians and Vaskans that Voyager stumbled into, and which Kyrian history seven centuries later recast as a massacre carried out by a ruthless warship Voyager.
The Voyager episode Living Witness is set about seven hundred years after the ship's visit. A Kyrian museum presents a reconstruction in which Janeway's crew are brutal mercenaries hired by the Vaskans, who slaughter Kyrians with biogenic weapons and execute their leader Tedran.
The curator, Quarren, activates a recovered backup of the Emergency Medical Hologram, who is appalled. His account is different: Voyager was trading medical supplies with the Vaskans when Tedran's Kyrians boarded and took hostages, and it was the Vaskan ambassador Daleth who shot Tedran.
The Doctor's testimony inflames tensions between the two peoples, who still share the planet unequally, and a mob wrecks the museum. He and Quarren nonetheless set the record straight, and a later scene shows that the correction became the start of a real reconciliation.