Weeping War

The Fall of Myth Drannor was a battle that culminated on 15 Flamerule, 714 DR, in which the Akh Velahr (the army of Cormanthor) were defeated by the invading demonic forces.

Akh Velahr
The army was led by Fflar Starbrow Melruth and consisted of an unknown number of elves.

Demonic horde
The demons were led by Aulmpiter, Gaulguth and Malimshaer and included nycaloths, yugoloths and other demons and devils. It also included thousands of gnolls, goblins, orcs and ogres.

Origins
The exact power responsible for the original demonic summoning is unknown, but it is believed to have been a flind or orc shaman, or a human archmage. This unknown individual summoned yugoloths to raid the lands of the Dragonreach, but Aulmpiter, Gaulguth and Malimshaer broke free of their master's control and rounded up huge numbers of goblinkin in the surrounding area.

Word of this large army reached Captain Fflar of Myth Drannor, who set a watchpost north of the city at Helmgrove, appointing the company named the Shield of Myth Drannor to it. The entire company was destroyed by the demonic forces.