...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

Assault.

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).