Tyranny of Dragons
Tresendar Manor was once owned by a royal family in Phandalin before the orc raids of Uruth Ukrypt wiped out the town and laid waste to the settlement in 951 DR. The manor, along with the whole town was abandoned during that time. Most of the members of the Tresendar Family were buried in the crypt below the manor. Sometime after the Spellplague, some members of the family had risen as undead defending the cellars of Tresendar Manor.
Sometime later, the ruins of the manor became the hideout for the band of thugs known as the Redbrands.