"Aliens are weak and impure, a blight on the galaxy. I'm carrying out the Emperor's will and gaining key alliances. This is only the beginning"
- Commander Vergost to Republic operatives

Vergost was a human male who lived during the Cold War

The Cold War Event Cold War (3653BBY - 3642BBY)

.
He was an ideologue who spent his career in the Empire

Reconstitued Sith Empire Organization Galaxy-Wide Organizations

pursuing the elimination of non-human species, viewing aliens not merely as inferior, but as a plague to be wiped out. Although respected for his effectiveness by the Moffs

Moff Miscellaneous Ranks

, his own obsessions had limited his advancement within the Empire - such extreme views were outside the Imperial mainstream and represented a counterpart to the progressive movement that had opened the gateway for aliens to become Sith.
Shortly before the end of the war, Vegost held the rank of Commander

Commander Miscellaneous Roles

and was stationed on Nar Shaddaa

Nar Shaddaa Planet

in charge of the operations in the Labor District of the Industrial Sector, where Pharmalux Technologies, one of the companies controlled by Empire, operated several facilities. When he realized that the Hutt Cartel

Hutt Cartel Organization Galaxy-Wide Organizations

's favor could be gained through the elimination of the Evocii

Evocii Sentient Species

population, he saw it as a chance at vindication - an opportunity to prove, once and for all, that his terrible science of mass murder could directly benefit the Empire.
He ordered the development of a special toxin

Evocii Extermination Toxin Weapon Viruses, poisons, diseases and bioweapons

at the Pharmalux

Pharmalux Technologies Organization Misc. Companies

chemical plant that would only affect Evocii, and when it was ready, he began testing it

Genocide Event Cold War (3653BBY - 3642BBY)

on the local population. The toxin proved effective, but Vergost's plans were disrupted

Chemical Agent Event Cold War (3653BBY - 3642BBY)

by a group of Republic operatives

Republic Operatives Organization Temporary Unions

who raided the plant and shut it down completely. Obsessed with pleasing the Emperor

Emperor Miscellaneous Ranks

by gaining favor with the Hutt Cartel, Vergost decided to commit genocide against the Evocii using the remaining toxin and ordered as many Evocii as possible to be captured and taken to the Pharmalux waste processing facility where he set up his extermination factory. He even invited several prominent Imperial officers to a demonstration of the toxin's effectiveness, but his plans were again thwarted when the same group of operatives stormed the facility

Extermination Event Cold War (3653BBY - 3642BBY)

. The operatives managed to defeat his security forces and capture Vergost himself, preventing him from spreading the toxin throughout Nar Shaddaa.