Forgive me if this is somewhere in the rules; I've poked around and can't seem to find answers to these questions:
1) If a home area (Winterfell, Lannisport, etc.) is left empty of units, containing only its 2-strength Garrison Token, does an enemy attack start a combat sequence (i.e. playing House Cards, etc.), or is the Garrison Token treated the same way as a Neutral Force Token?
2) When, if ever, are Garrison Tokens placed back on the board? Are they permanent features of that location? (i.e. Greyjoy takes Lannisport: does the 2-Strength Garrison Token remain?) If they are removed, are they gone forever? Or are they put back if their natural owner retakes the location?