The Stockwood Scrolls
Battle of Secomber
This event was a major defeat for the combined Waterdeep and Zhentarim forces fighting against the Cult of the Dragon near Secomber in Uktar 1489 DR. The Cult had advanced and taken the town, setting it up as a base to raid the surrounding area. Dagult Neverember, then Open Lord of Waterdeep, arranged a small army to try and take it back, but they were thoroughly defeated upon the arrival of an ancient blue dragon.
Shortly after, the Cult finished their raiding of the town, and moved away, leaving the town mostly in ruins.