The Seventh Column
From Bungiepedia
The Seventh Column is the name of Bungie's official fanclub and underground army.
Although Bungie fansites can be found throughout the internet and the world, the Seventh Column, found on Bungie.net, is the largest and only "official" fanclub. The Seventh Column's primary presence on Bungie.net can be found in its Groups, which members can join and create, tailoring them to their own preferences on Bungie.net.
The 7th Column is yet another example of Bungie's and its fans' obsessions with the number Seven.
