Duel for middle earth - Grond

Grond goodie
During setup, after revealing 3 Landmark tiles, shuffle the Grond tile with the other remaining Landmark tiles and form a stack, facedown.
Remove 1 enemy Fortress from any region. If enemy Units are present in the region, they must retreat to a single adjacent region.
Note: If this retreat triggers a conflict, resolve it as normal. Finally, place 1 Fortress and 1 Unit in the region