Political event
A dark day for the empire as dozens of men, women, and children were executed for treason. All of which thereafter presumed innocent
During a large scale raid on a growing crime syndicate in Choilli, the royal guard discovered a book containing dozens of names of various people around the city. Without further investigation they took to finding these people. Almost every single Tiefling discovered that day was trialed and found guilty of treason. Without any stronger evidence, they were hung...enmasse.
Forever written in history as one of the central kingdoms darkest days, there was national outcry against the actions taken by the royal guard. There was no reason, cause, or piece of evidence that could place any of the Tiefling arrested that day within the syndicate. They were simply executed on a "strong suspicion.