Through the use of a magical device known as a beacon torch, we can mark targets of our choosing for future actions by our troops.  To that end, we think the Scourge are using Andorhal's watchtowers as a means to control their troop movements.$B$BYour mission: breach Andorhal's defenses to plant beacons at all four watchtowers.  You'll need to be in the doorway of each tower to plant the beacon; it will then proceed to mark the tower.  There are only five charges on the beacon torch, so use them wisely!