Source: EU Portal
As we explained in the previous announcement, the superstars for (half of) December are the British tank destroyer line, leading up to the FV215b (183). Use the discounts and bonuses on this tank line from 1 December at 06:00 to 13 December at 06:00 CET (UTC+1).
Remember that if you have the FV215b (183) in your garage when Update 9.21 is implemented, you’ll not just keep it as a special vehicle, but also get the FV217 Badger for free!
50% discount on purchasing the following vehicles:
30% discount on purchasing the following vehicles:
+50% Crew XP bonus on all vehicles discounted in the special