Kahdavrakan Supper (concept)
The Kahdavrakan Supper was a massacre conducted by the Order of Saint Sansia's Rose in 1227, in the waning years of the Faghira-Jalil Revolt, against the capital of the Hudi client kingdom of Kudamash.
Entering the metropole under the flag of a truce, the Sansianite representatives would be invited to join the local ruler in a feast in honor of his nominal submission to the Order. The dinner would, instead, end with the Sansianites pulling daggers on their hosts and butchering the entire Hudi royal dynasty. After the city gates were opened from within, the bloodshed continued on the streets for hours, until the Agionists promised an end to the battle and honorable treatment for those still in hiding. The 'honorable treatment' would turn out to be gathering all the survivors on a nearby hill, and bloodletting them to death. The attrocity was not limited to the city itself, and in the coming months, what can only be described as an attempt by the Sansianites to utterly destroy the Hudi people wherever they found them ensued, causing a mass exodus to the lands of the Mamuramat south. In all, anywhere from 20,000 to 50,000 perished in the mayhem.
The event, naturally, incited outrage across the continent, and the final crystallization of feelings among the locals that the threat the Saintly Orders posed to their very existence outweighted any petty feuds or regional squabbles that prevented their cooperation.