Those in the conquest of Gorgoroth and those in fealty to Gondor work together to cleanse the Morgul Vale and the fortress of Minas Morgul of the evils that inhabit them.
'${PLAYER}! You earned my respect and it has not wavered; word of your deeds in Gorgoroth and in the northern lands has made its way back to me and to the other Rangers of Ithilien. And here we now meet upon the very doorstep of Minas Morgul! That is incredible, my friend, and yet I should not have doubted our paths would lead us here, where there is evil to be faced. Is that not what we do, time and again? It is indeed!
'Faramir has regained his health, a gift of time and some say the healing powers of King Elessar himself, and he has led us here. There is a camp now, Echad Uial, and from there he plans to cleanse the city of its evil, and reclaim it for Gondor. Damrod travels with him and will be pleased to speak with you. Return to me when Damrod sees fit to release you!'
Echad Uial can be found in Rath Dúath.
You should travel to Echad Uial.
Damrod and Thurindol can be found at Echad Uial.
You should talk to Damrod and Thurindol.
Complete quests in Rath Dúath to establish a hold in the area.