Today I wanted to take a look at Controlling and Liberating sites.
Site control was introduced in the Two Towers Block, but became more popular with the release of Siege of Gondor.
Essentially, site control is a tactic the Shadow Player can use to do various, powerful things called out by specific cards. For example, once you control a site, you can activate Gorgoroth Assassin's text to assign him to an unbound companion.
You take control of a site by using a card like Siege Troop.
Physically, when the Shadow Player controls a site, they take the first available site on the Site Path and place it in their Support Area.
For example, if Player 1 is at Site 5 and Player 2 is at Site 4, and Player 1 uses Siege Troop to control a site, they take Site 1 from the Site Path and move it to their Support Area. Note that if a player's Site Marker is still on Site 1, it can't be controlled. The gametext of that site can no longer be used, although it's keywords are still active (i.e. it is still a battleground).
Finally, the Free Peoples' player can liberate a site using a card like Helm! Helm!
Sites must be liberated from highest site number to lowest site number. When the site is liberated, put it back on the Site Path.
As an interesting aside, when I worked at Decipher during the summer of 2002, we were playtesting The Two Towers and creating the control mechanic. There was originally going to be an auto-win condition, saying that if a player controlled more than 5 sites, they won the game (or if I recall correctly, if a Shadow Player could spot 5 controlled sites, the Ring-Bearer was corrupted). We opted to not introduce a new rule, which I think made the mechanic less popular. Leave a comment to let me know what you think!