This Friday December 5th at 12PM PST / 9PM CET and running through to December 8th at 12PM PST / 9PM CET, you will be able to rally your Clan up to take place in the first Clan Wars for Call of Duty: Advanced Warfare.
Gold Centurion Exo/Shin Guards
‘Clans that place 1st in either the Gold or Platinum division will unlock access to the in-game Gold Centurion Exo. If you already unlocked the Exo from the final Call of Duty®: Ghosts Clan War, you will move to the next piece and unlock the Gold Centurion Shin Guards.’
If you don’t really understand how all this ‘Clan Wars’ stuff is meant to work please check this out:
SOURCE: Call of Duty