First Dragonspear War

The First Dragonspear War was an armed conflict between the allied armies of Baldur's Gate and Waterdeep, and the devils that dwelled within Dragonspear Castle.

Location
The war took place in the region of the Sword Coast surrounding Dragonspear Castle, as well as within the fortress itself.

History
On Hammer 1, in the, a Waterdhavian patrol passing through the Open Marches was assaulted by a group of devils and goblinoids. The portal that Ithtaerus Casalia once created beneath Dragonspear Castle was open once more.

The city-state's soldiers tracked the monstrous assailants back to Dragonspear Castle and set fire to the ancient ruin. The devils were not beat however, as their ranks continued to swell for months.

After some time the Waterdhavian troops were joined by the Flaming Fist from Baldur's Gate, and the combined forces were able to defeat the remaining fiends.

Aftermath
In the years that followed, a significant number of tieflings appeared in the lands surrounding the castle.