Great Disaster

The Great Disaster (大災) is one of the four major disasters, taking place in the Sacred Vollachia Empire approximately one year and five months after Natsuki Subaru was summoned to the world. Its prognosis is a driving force behind Arc 7 and it is a major event that takes place during Arc 8. Prior to the disaster, there was a major battle for control over the Imperial Capital of Lupugana between the Imperial Army, Natsuki Subaru’s Pleiades Battalion, and a loose collection of individuals — including the Emilia Camp, the Priscilla Camp, Serena Dracroy’s Flying Dragon Squadron, members of the Imperial Army, and numerous rebels who began uprisings all throughout the Empire — colloquially known together as the Rebel Army.

According to Ubilk, a Stargazer of the Empire, the Great Disaster would only commence after the death of Emperor “Vincent Vollachia”. In a confrontation between Vincent Abellux and Chisha Gold during the ongoing battle, the latter was killed by Balleroy Temeglyph, a dead man who had formerly been the Ninth among the Nine Divine Generals. Balleroy, along with all the deceased of Vollachia, were brought back as zombies by the bearer of the Great Disaster, Sphinx, a copy of Ryuzu Meyer who was created from the Witch of Greed’s failed immortality experiments and was a driving member of the Demi-Human Alliance during the Demi-Human War. With Chisha’s death, the Great Disaster commenced.

Trivia

 * The name “Great Disaster” is not exclusive to this disaster. Long ago, at an unknown time in the past, Lupugana's Magic Crystal Cannon once destroyed a large city, and according to legend, it was used in an incident also known as a Great Disaster.