Ok there has been a lot of confusion with clan wars and new members not knowing how to join or participate.
The following information is exclusive to the Call of Duty mobile app. The old COD Elite is going way so forget anything you knew of it.
Forum Usergroups
Please note clan rosters are NOT the same as forum usergroups. In the past we've used the usergroups to help us cross reference who's active on the forum with who's in the clan roster. At this time its not imperative as to which usergroup(s) you're apart of as long as you choose one for your console - in order to change your forum name color (yellow - no group defined, green - xbox, red - playstation). It's also recommended to join any game related usergroups - you can easily send mass PM's to a usergroup to setup play time or what not.
Within the COD mobile app if you if you tap the people icon (lower right corner) it'll bring you to a screen that displays your friends list - at the top there is a search field. This field is used to find PLAYERS AND CLANS. Here are all the clans / rosters we have officially with a brief explanation of what they're for and who runs them.
Clan Rosters / Names
Over 30 Clan
Xbox 360 explicitly - general population / default roster
Run by - BlackDeath / gt: aXBlackDeathXa
Over30Clan Wars
Xbox 360 explicitly - Ghosts clan wars - highly active players only / inactives will be purged
Run by - Z06NESS
Over 30 Clan X1
Xbox One explicitly - Ghosts clan wars / general population (for now)
Run by - Vidzjunkie
Over 30 Clan P1
Playstation 3 & 4 mix - Ghosts clan wars / near max capacity
Run by - JAGERpatrol
Over 30 Clan P2
Playstation 3 & 4 mix - casual players / any new applicants will be placed here due to P1 being near capacity
Run by - Repo_dog
PLEASE PM the leader of the respective roster you want on. Most of us are getting spammed with dozens of clan applications (within the COD mobile app) making it a nightmare to manage. At this time there is no way to make the clan invite only within the app.
mods feel free to edit names / descriptions
1/24/2014 - updated 360 clan wars roster leader