Vehicles, Choppers, Aircraft, Ships & Subs used in any War / Conflict / Insurgency in 2013 .
Here's a small list from wiki ( July 2013), I'll add if there's any additional conflict until the end of the year.
The Rules and Regs
1. You must have fun
2. You must have fun
3. Builds must not be started before the campaign start date
4. Must have in progress photos on the Campaign thread
5. An image of your build when finished must be uploaded into the campaign photo gallery
You'll receive a ribbon for this campaign. But only one even if you build 64 builds for this Campaign.