Bungie.net Clan Alliances: Growing your community
The current purpose of an Alliance is to link together Clans that share like-minded interests and to allow larger communities and organizations to sort their Clan members by interest. Clans who have reached the 100 member cap on Clan rosters can use the Alliance feature to grow by creating more Clans and link them together with an Alliance.
A Clan may only join one Alliance. However, an Alliance can be made up of any number of Clans.
To help navigate through Clan Alliances, there is a navigation tab at the top right of your Group page so you can easily jump from one Clan to another within an Alliance.