Minas Tirith has 30 hit points plus 10 for each player.
Forced: At the end of the round, deal 1 damage to Minas Tirith for each enemy in the staging area. Then, if Minas Tirith has no hit points remaining, the players lose the game.
Immune to player card effects.
X is the number of resources on Grond.
Forced: At the beginning of the quest phase, place 1 resource on Grond. Then, deal X damage to Minas Tirith.
Travel: The Witch-king makes an immediate attack against each player, in turn order.
Immune to player card effects.
While Gate of Gondor is the active location, each enemy in play gets -30 engagement cost.
Forced: When Gate of Gondor is explored, return each engaged enemy to the staging area.
...it was the key, the weakest point in all that high and impenetrable wall. –The Return of the King
While City Wall is the active location, damage that would be placed on Minas Tirith must be placed here first.
Forced: When City Walls has damage equal to its quest points, discard it. Then, each player raises his threat by 3.
For the main wall of the City was of great height and marvellous thickness... –The Return of the King
While at least 1 enemy is in the staging area, progress cannot be placed on locations in the staging area.
Shadow: Attacking enemy gets +1 
(+2 instead if it has the Harad trait).
Forced: When a player plays an event that would cancel the effects of a treachery card just revealed from the encounter deck, cancel the effects of that event. Then, discard Fire-filled Trench.
...as the trenches were made each was filled with fire, though how it was kindled or fed, by art or devilry, none could see. –The Return of the King
While Siege Tower is in the staging area, it gains Archery 3.
Forced: After Siege Tower becomes the active location, shuffle the encounter discard pile into the encounter deck and discard cards from the top until an enemy is discarded. Add the discarded enemy to the staging area.
5
2
5
Cannot have attachments or be attacked by more than 1 character at a time.
When Revealed: The Black Serpent makes an immediate attack against the first player.
...he was filled with a red wrath and shouted aloud, and displaying his standard, black serpent upon scarlet, he came... –The Return of the King
6
2
9
Cannot have attachments or take more than 3 damage each round.
Forced: When War Mûmak is defeated, reduce each player's threat by 4.
4
2
4
Forced: After Southron Champion is dealt a shadow card with no shadow effect, either deal 3 damage to Minas Tirith, or it makes an additional attack after this one.
Shadow: Deal 1 damage to Minas Tirith
3
1
4
When Revealed: Put the topmost Orc enemy in the discard pile into play engaged with you.
Shadow: If this attack destroys a character, return attacking enemy to the staging area.
3
1
3
When Revealed: Either deal 2 damage to a hero you control, or deal 2 damage to Minas Tirith.
Shadow: Attacking enemy gets +1 (+2 instead if it has the Mordor trait).
2
1
2
While Minas Tirith is in play, undefended damage dealt by Mordor Orc must be dealt to Minas Tirith.
Shadow: If Minas Tirith is in play, engage Mordor Orc and deal it a shadow card.
When Revealed: Each player searches the encounter deck and discard pile for an enemy and puts it into play engaged with him. Shuffle the encounter deck.
Shadow: Either deal 3 damage to Minas Tirith or attacking enemy makes an additional attack after this one.
When Revealed: Attach to a Nazgûl enemy. Limit 1 per enemy. (Counts as a Mount attachment with the text: "Attached enemy gets +1 +1 +1 and -10 engagement cost.Forced: At the end of the round, return attached enemy to the staging area.
...horrible as carrion–fowl yet greater than eagles, cruel as death. –The Return of the King
When Revealed: Remove a hero you control from the quest and attach Black Dart to that hero. Limit 1 per hero. (Counts as a Condition attachment with the text:"Forced: At the end of the round, deal 1 damage to attached hero.")
Shadow: If this attack damages a hero, attach Black Dart to that hero.
When Revealed: Either deal 1 damage to each exhausted character, or deal 5 damage to Minas Tirith.
Shadow: Attacking enemy gets +1 If this attack destroys a character, deal 2 damage to Minas Tirith.
When Revealed: Each player deals 1 damage to a hero he controls. Until the end of the round, treat the printed text box of each damaged character as if it were blank, except for Traits.
...a great cloud streamed slowly westward from the Black Land, devouring light... –The Return of the King
6
4
12
1 
Setup: Add Wraith on Wings to the staging area.
Cannot have non-Morgul attachments.
Wraith on Wings gets +1 and -1 enagement cost for each resource on it.
Forced: At the beginning of the quest phase, place 1 resource on Wraith on Wings (Limit 5 resources.)
"Here will the hammer–stroke fall hardest. And for that reason Mithrandir came hither in such haste. For if we fall, who shall stand?
–Beregond, The Return of the King
Setup: Set Minas Tirith, Grond, The Witch-king, and each copy of Wraith of Wings aside, out of play. Search the encounter deck for a copy of Pelennor Field and make it the active location. Shuffle the encounter deck. The players may attach Esquire of Rohan and Esquire of Gondor to different heroes.
...companies came and were hailed and cheered and passed through the Gate, men of the Outlands marching to defend the City of Gondor in a dark hour.
–The Return of the King
Skip the quest phase and combat phase.
Forced: At the end of the planning phase, place 1 progress here.
"The enemy," men murmured. "The dike is down. Here they come pouring through the breaches!" –The Return of the King
When Revealed: Each player adds 1 set aside Wraith on Wings to the staging area and reveals an encounter card. Starting with the first player, each player discards cards from the top of his deck until he discards an ally that is not in play. Put the discarded ally into play in the staging area and treat its text box as if it were blank until the end of the phase.
"Where are our own folk?" –Men of Gondor, The Return of the King
X is the total cost of all allies in the staging area.
Allies in the staging area are treated as if their text box is blank, are immune to player card effects, and are under no player's control.
Forced: At the end of the round, assign damage among the allies in the staging area equal to the number of enemies in the staging area.
...at east the city was besieged, enclosed in a ring of foes. The Rammas was broken, and all the Pelennor was abandoned to the Enemy. –The Return of the King
When Revealed: Each player takes control of each ally he owns in the staging area and exhausts it. The first player adds Minas Tirith, Grond, and The Witch-king (Captain side faceup) to the staging area. Each other player searches the encounter deck and discard pile for a different enemy and adds it to the staging area. Shuffle the encounter deck.
...since the middle night the great assault had gone on. –The Return of the King
The White City Besieged gets +4 quest points for each player in the game.
The players cannot travel to Pelennor locations.
Forced: When an enemy is destroyed, place progress on this stage equal to that enemy's total (progress must be placed on the active location first).
Horns, horns, horns. In dark Mindolluin's sides they dimly echoed. Great horns of the North wildly blowling. Rohan had come at last.
–The Return of the King
When Revealed: Set the Witch-king aside, out of play. Each player searches the top 10 cards of his deck for an ally that matches the sphere of a hero he controls and put it into play under his control. Each player shuffles his deck.
...the hosts of Mordor wailed, and terror took them, and they fled, and died, and the hoofs of wrath rode over them. –The Return of the King
Progress cannot be placed on this stage by questing successfully is instead assigned as damage among enemies in play. (Progress must be placed on the active location first.)
Forced: At the end of the quest phase, advance to stage 5A.
And now the fighting waxed furious on the fields of the Pelennor; and the din of arms rose upon high, with the crying of men and the neighing of horses.
–The Return of the King
When Revealed: The first player adds The Witch-king to the staging area (Sorcerer side faceup). Then, he searches the encounter deck and discard pile for a Fell Beast and attaches it to The Witch-king, if able. Shuffle the encounter deck. Each other player reveals an encounter card.
The Witch-king and shadow cards deal to The Witch-king are immune to player card effects.
Forced: When an enemy attacks and destroys a character, deal 1 damage to Minas Tirith.
This stage cannot be defeated unless Aragorn is in play and The Witch-king is in the victory display. If the players defeat this stage, they win the game.
Setup: Set each Harad enemy recorded in the campaign log aside, out of play. The first player attaches Andúril and Banner of Elendil to Aragorn and set him aside, out of play. Add The Corsair Fleet to the staging area (Gondor side faceup) and place X resources on it, where X is the number recorded in the campaign log. Remove each burden with the following burden set icons from the encounter deck, then flip this card over.
Forced: When the players advance to stage 5B, add each set aside Harad enemy to the staging area.
Resolution: Add 1 copy, per player, of Wraith on Wings to the campaign pool. The players have earned those burdens. If Esquire of Gondor or Esquire of Rohan is attached to a hero, that hero's controller has earned that boon.
Thus came Aragorn son of Arathorn, Elessar, Isildur's heir, out of the Paths of the Dead, borne upon a wind from the Sea to the kingdom of Gondor.
–The Return of the King
6
6
14
Immune to player card effects.
Cannot be optionally engaged or take damage.
Forced: At the beginning of the quest phase, discard cards from the encounter deck until an enemy is discarded. Add the discarded enemy to the staging area.
6
6
14
Only the engaged player can declare attackers against the Witch-king.
Forced: At the beginning of the encounter phase, The Witch-king engages the first player. Then, it makes an immediate attack.
"No living man may hinder me!" –The Return of the King