Create or join
Build an Alliance Hall. At level 3 you can create an alliance. Leaders and officers can invite other players by name.
Size
An alliance can have 3 members for each level of the leader's Alliance Hall, up to 30.
Roles
The leader can make officers and can give the leadership to another member. Officers can invite and remove members.
Weekly badges
Each week the best attacker, defender, builder and looter — player and alliance — earn a badge.