At its live event today, Activision announced an ongoing 'Clan Wars' meta-game for Call of Duty: Ghosts.
In Clan Wars, teams are paired up with other clans at similar skill levels, and then fight for territories in two week-long matches. Every win in multiplayer contributes toward clan scores. Territory wins unlock goodies, like camos and helmets. Clan Wars is an ongoing battle, offering new maps and new locations, throughout the year. An app has also been announced that allows players to manage their clans' activities.