Book XV Chapter 12: One Hope Remains  

'I thought I has seen the this hilt for the last time. The very weight of it brings back memories both painful and heartening. Long and well it served me before it was shattered by the false king.

'Bring the hilt to Narmeleth. She has been preparing for the final assault and is awaiting your return.'

Narmeleth seeks to put a final end to Mordrambor and Mordirith.

Objective 1
Bring the hilt to Narmeleth
Gath Forthnir is in the northern reaches of Anmgar.

Golodir told you to bring the hilt to Narmeleth in Gath Forthnir.

Objective 2
Assault Gador Gularan
Narmeleth is in Gath Forthnir in the northern reaches of Anmgar.

Narmeleth told you to gather friends and speak with Narmeleth to begin the final assault.

You enter the instance at this point:

Objective 3
Talk to Golodir at Gath Forthnir
Gath Forthnir is in the northern reaches of Anmgar.

You should speak with Golodir in Gath Forthnir.

Objective 4
Talk to Glorfindel in Rivendell
Rivendell is in the north-east corner of the Trollshaws.

Golodir sent you to speak with Glorfindel and bring him news of Mirdirith's defeat.

Objective 5
Talk to Elrond in Rivendell
Elrond can be found in the Last Homely House in Rivendell.

Glorfindel told you to deliver your tidings to Master Elrond.

Objective 6
Talk to Failloth in Rivendell
Failloth is in the courtyard of the Last Homely House in Rivendell.

Elrond told you to retrieve Laerdan's legacy from Failloth, the caretakers of Rivendell.

After completing this quest, and if you have completed the books:
Epic - Book IX: The Shores of Evendim
Epic - Book X: The City of the Kings
Epic - Book XI: Prisoner of the Free Peoples
Epic - Book XII: The Ashen Waste
Epic - Book XIII: Doom of the Last King
Epic - Book XIV: The Ring-forges of Eregion
Then at this point, you will have completed the deed:
The Shadows of Angmar II