You do a list of quest to join a GC. Then you chose a path withone of the militias. I understand many feel that as was mentioned "one of the biggest selling points of this game is that we can access all content as 1 character." But now content was added that demanded loyalty to one of the 3 city states. You make a commitment. I like it, and agree with it. I feel that in the future though, its reasonable to believe a betrayal quest that would allow a player to change militia is reasonable.