The Forest Follows

Immediately after determining who deploys first (after step 1 of the Deployment Phase Sequence), you must place a single Forest Terrain Feature:
• Entirely within your half of the Battlefield
• Not in contact with any other Terrain Feature except Open Terrain
• More than 6″ away from the centre of the board when playing Hold the Ground, and more than 6″ away from the center of any marker used for the Secondary Objective.
If both players are fielding Sylvan Elves, the player that selected their Deployment Zone places their Forest first.
This Terrain Feature may not be larger than 27 cm in length and 19 cm in width. All Forests on the Battlefield are considered Dangerous Terrain (1) for all units except those with Strider or Strider (Forest).