Fastred wants you to travel to the town of Walstow to the east and meet with Winsig, the Thane. He is concerned about the number of Orcs that have been pouring into the Sutcrofts and hopes that the town has held.
'${PLAYER}, you have done me a great many services in your short time here.
'I have one more task to ask of you for now. To the east is the town of Walstow and more importantly, the path to the East Wall from which countless Orcs are spilling into our lands.
'I want you to fight your way to Walstow and ensure that the town still stands. Riders of the enemy patrol the roads and will make every attempt to cut you down on your way. Once you make it to Walstow, speak to the Thane, Winsig. She is young, but she has strength far beyond her years.
'May fortune find you well on your journey. For Rohan!'
Fastred wants you to defeat riders on your journey to Walstow.
Goblin and Orc riders can be found just off the road to the east.