Remnants is a side quest in Tyranny, available if you governed Lethian's Crossing during the Conquest and granted it to the same side whose storyline you follow after Act I. The quest only appears after completing Blood and Bronze (Chorus) or Iron and Blood (Disfavored).
The enemy is either the Disfavored or the Chorus, depending on who you sided with.
The remnants of a larger enemy force have taken some settlers prisoner in the nearby village of Timbervale. Head to the village to see how many settlers survived the attack and kill any groups of enemy soldiers you find in Timbervale Village.
- Simple enough. Head to Timbervale Village and kill any hostiles you come across, then liberate the imprisoned settlers.
- Return to whomever gave you the quest and collect your reward.