The Battle of Graves Hall took place in Graves Hall, the Aisonian military academy, in 1000 AE when a fire elemental, which had been let loose by agents of the Clergy of Nergal and Magestar, attacked the academy and its staff. It took the efforts of the entire academy as well as the graduates Rhett Lassiter and Marcus Sarillius, who wielded the magic sword Dusk, to finally banish the elemental to the High Plane. Although the elemental was driven away, damage to the academy was excessive, and several hundred lives were lost. As a result of this, Aison's military might weakened, which would later leave it vulnerable to the Yamatian Invasion which was to follow.