171 DR


 * Halaster Blackcloak begins Halaster's Hunts in Undermountain. They last until 308 DR.
 * In northern Arcorar (present-day Yûlash), the last temple of Moander is destroyed and its priests killed following a two-year-long siege and skirmishing with the elves of Cormanthyr.


 * The deity Moander is trapped underneath the ruins by the High Magic of the Coronal and sixteen of Cormanthyr's High Mages, and banished from Toril.