Encounter set:
Assault on Osgiliath
Osgiliath.
The players cannot travel here.
Planning Action:
Spend 2 resources to place 1 progress token on The Old Bridge. (1 resource instead if there is another Osgiliath location in the staging area.)
Forced:
After the player who controls The Old Bridge lets an attack go undefended, return The Old Bridge to the staging area.